Home

MSeep User Manual

1. Support window Problem Descriptiontab L Send Support E Mail window L Model window e New Wizard window Basic Layout e New Wizard window Top Layer Shape screen New Wizard window Top Layer Specification screen New Wizard window Material types screen New Wizard window Summary screen e Select geometry window L Geometry Limits window Ahl lt lt lt Points window 7 Who Confirm window for deleting used points skn Layers window Boundaries tab kkk KL Layers window Materials tab kk e Information window on confirmation of a valid geometry Report Selection window A L Contour Potentials window Potential results Contour Potentials window Velocity results se Contour Potentials window Pressure results L View Input window Geometry tab k ee a View Input window Geometry tab legend displayed as Layer Numbers my Legend Context menu O LL LKV VVV Ve View Input window Geometry tab legend displayed as Material Numbers View Input window Geometry tab legend displayed as Material Names Legend Context menu for legend displayed as Materials Color window 5 E MEM ooo View Input window Geometry tab e Right Limit window NH gt LL KKK K K A k kkk n se Representation of a polyline lt se Examples of configu
2. la lo X 2 233 23 963 Figure 6 2 Contour Potentials window Potential results 36 of 61 Deltares View Results Data Data MEE options gt gt Y 24 500 Figure 6 3 Contour Potentials window Velocity results Data Dota REM options gt gt PAE AAA Y 24 423 Figure 6 4 Contour Potentials window Pressure results Deltares 37 of 61 MSeep User Manual 38 of 61 Deltares 7 7 1 Graphical Geometry Input This chapter explains how to define the soil layers in a two dimensional cross section by drawing using the shared D Series options for geometry modeling o section 7 1 introduces the basic geometrical elements that can be used o section 7 2 lists the restrictions and assumptions that the program imposes during ge ometry creation o section 7 3 gives an overview of the functionality of the View Input window section 7 4 describes the creation and section 7 5 describes the manipulation of general graphical geometry using the View Input window Besides graphical input the geometry can also be imported or tabular forms can be used see section 4 3 2 See the MGeoBase manual for a description of special features to create cross section geometry semi automatically from CPT and or boring records Geometrical objects Geometry can be built step by step through the repetitive use of sk
3. Deltares 21 of 61 4 3 4 3 1 4 3 2 MSeep User Manual The number of soil types do not have to be equal to the number of layers within your geometry You may define less soil types when one soil type can be used for more than one layer You can also define more soil types to be able to quickly change soil types per layer for alternative calculations When defining the geometry layers you can select the soil type for a specific layer from a list containing all the names of the soil types entered here This list will be maintained and provided by the program itself The lower limit for the permeability is 10 m s Geometry menu On the menu bar click Geometry to display the menu options These options are explained in the following sections New section 4 3 1 Start creating a new geometry manually New Wizard section 4 3 2 Create a new geometry using a wizard Import section 4 3 3 Import a settled geometry file in the Deltares exchange format Import from database section 4 3 4 Import a geometry from an MGeobase database Export section 4 3 5 Save a geometry file for exchange with other Deltares Systems Geo programs Export as Plaxis Dos section 4 3 6 Save a geometry file in a different format Limits section 4 3 7 Set the range of the horizontal co ordinates Points section 4 3 8 Add or manipulate points Layers section 4 3 9 Define or modify layer boundaries and corresponding soil types Ch
4. lt Previous Soft Clay y Properties Cancel Help Figure 4 5 New Wizard window Material types screen In the fourth screen Material Types of the New Wizard window the materials used for the layers in the project can be specified The number of layers was defined in the first screen Basic Layout The materials that can be chosen from are predefined and given in Table 4 2 Table 4 2 Predefined materials in D Settlement Material type Unsaturated weight Saturated weight kN m3 kN m3 Muck 11 11 Peat 12 12 Soft Clay 14 14 Medium Clay 17 17 Stiff Clay 19 19 Loose Sand 17 19 Dense Sand 19 21 Sand 18 20 Gravel 18 20 Loam 20 20 The materials for each layer can be selected individually using the selection boxes at the left hand side of the screen or one material for each layer can be selected at once using the selection box at the top right of the screen The parameters of each material can also be reviewed New Wizard Summary Deltares 25 of 61 4 3 3 MSeep User Manual New Wizard Basic layout Limit Left m 0 00 Limit Right m 75 00 Number of Layers 5 Ground Level m NAP 0 00 Phreatic Level m NAP 1 00 Top layer hl m 2 50 L1 h2 m 2 50 L2 h3 m 1 00 L3 h4 m 1 00 L4 2 50 3 00 8 00 4 00 6 00 12 50 3 00 2 50 Material types Layer1 Gravel Layer2 Soft Clay Layer3 Loose Sand Layer 4 Dense Sa
5. X 7 021 NY 23 848 Edit Current object None Figure 7 2 View Input window Geometry tab legend displayed as Layer Numbers In the Geometry tab of the View Input window it is possible to change the type of legend When a soil type box in the legend is right clicked the menu from Figure 7 3 is displayed v Layer Numbers Material Numbers Material Names Figure 7 3 Legend Context menu With this menu there are three ways to display the legend of the layers As Layer Numbers the legend displays one box for each layer Each layer and there fore each box is displayed in a different standard color Next to each box the layer number and the material name are displayed corresponding to the color and number of the layer in the adjacent Geometry window see Figure 7 2 As Material Numbers the legend displays one box for each material Each material and therefore each box is displayed in a different color which can be changed by the user see below Next to each box the material number and name are displayed corresponding to the color and number of the material in the adjacent Geometry window see Figure 7 4 As Material Names the legend displays one box for each material Each material and therefore each box is displayed in a different color which can be changed by the user 44 of 61 Deltares Graphical Geometry Input see below Next to each box only the material name is displayed corresponding to the
6. File menu and choose New In the New File window displayed select New Geometry and click OK see section 4 3 2 In both cases the Geometry tab of the View Input window is displayed Figure 7 8 with the default limits of the geometry from O to 100 m JA View Input Geometry Input Boundary Conditions Mesh Edit A RRE Para ra ere TA K A PA KE ERR 198 ale NE El gt od 3 2 o 5 E PI E E P Tool amp pa E Cal E FE 103 as 2 207 0 000 100 000 ccna 5 67 895 Y 15 250 Edit Figure 7 8 View Input window Geometry tab 7 4 2 Set limits The first thing to do when creating new geometry is to set the model limits This is possible by selecting and then dragging the limits to their proper place one by one It is also possible to select a limit and edit its value by clicking the right hand mouse button after selecting the limit and then choosing the Properties option in the pop up menu The property window belonging to the selected limit is displayed Figure 7 9 enabling to define the new X co ordinate for this limit 46 of 61 Deltares Graphical Geometry Input x Limit at right side m 75 000 omes Figure 7 9 Right Limit window 7 4 3 Draw layout It is possible to use the Add single line s Add polyline s and Add point s to boundary PL line buttons to draw the layout of the geometry See section 7 3 2 for more information s on ho
7. This means that you can focus your skills directly on the input of sound geotechnical data and on the subseguent stability analysis MSEEP is an integrated part of the M Series Therefore you can exchange relevant data with MGeoBase central project repository D SETTLEMENT transient settlements D GEO STABILITY stability and D GEO PIPELINE directional drilling MGeoBase is used to create and maintain a central project database containing data on measurements geometry and soil properties of several cross sections Besides exchange of input data MSEEP can also import a settled geometry that was calculated by D SETTLEMENT or a pore pressure load that was generated by MSEEP Features Sign agreements The direction of the positive X axis is perpendicular to the direction of the gravity pointing to the right The positive Y axis is opposite to the gravity direction pointing upwards The place of the origin may be chosen freely A positive discharge means injection a well A negative discharge means extraction pump ing Options Soil profile multiple layers The two dimensional soil structure can be composed of several soil layers with an arbitrary shape and orientation Each layer is connected to a certain soil type sheet piles It is possible to model vertical sheet piles The sheet piles are imperme able Calculation Methods The program MSEEP analyses two dimensional stationary groundwaterflow for the next
8. attachment Marked or not the Attach current file to mail check box and click OK to send it Send Support E Mail Gm This problem report will be sentto support amp deltaressystems nl You can also send the currentfile as an attachment Check the checkbox below to do this Sending of the problem report with E mail is only possible if the mail program on your system is configured as default Simple MAPI client consult your system administrator This will only work if your E mail program can reach external Internet E mail addresses F Attach current file to mail Cancel Figure 1 3 Send Support E Mail window The problem report can either be saved to a file or sent to a printer or PC fax The document can be emailed to support deltaressystems nl or alternatively faxed to 31 0 88 335 8111 Deltares Since January 1 2008 GeoDelft together with parts of Rijkswaterstaat DWW RIKZ and RIZA WL Delft Hydraulics and a part of TNO Built Environment and Geosciences are form ing the Deltares Institute a new and independent institute for applied research and special ist advice Founded in 1934 GeoDelft was one of the world s most renowned institutes for geotechnical and environmental research As a Dutch national Grand Technological Institute GTI Deltares role is to obtain generate and disseminate geotechnical know how The in stitute is an international leader in research and consultancy into the behavior of so
9. contains an echo of the input data concise information of the boundary nodes and if reguired detailed information of the potentails en discharges in each element node You can also view graphical output of the contour plots of the potentials or waterpressures History MSeep was first developed in 1987 1988 at GeoDelft with the support of both Oranjewoud BV and the Road and Hydraulic Engineering Division of the Ministry Version 1 0 was first released in 1988 and has since been upgraded a number of times each time adding new features and improving its users interface to suit the new demands of its users In version 4 5 1995 the Phreatic aguifer calculation method was added In 2001 version 6 0 the first Windows version of MSeep was released The option for display ing streamlines has been replaced by options for presentation of velocity vectors and contour plots The report presentation was furthermore enhanced Version 6 7 november 2002 contains improvements for geometry definition Version 7 3 2006 is enhanced with erosion calculations see option Enable erosion design in Figure 4 1 In Version 14 1 2014 Deo is renamed into Dz An option to specify page start number for report is added The limiting critical head is removed to certain upper limit dependent on geometry Calculation failed in some circumstances this is fixed in this version MSeep has shown to be a useful tool in engineering practice for solving relatively
10. flat elements It is recommended to use a ratio between 0 25 and 4 0 The generated mesh consists of triangles with three nodes per element If an error is found or when the number of elements or nodes exceeds the maximum num ber an ERROR MESSAGE will appear on the screen after which the system returns to this submenu At the position where a sheetpile is specified double nodes are created and the elements on both side of the sheetpile are disconnected The data of the sheetpile is shown on the screen with the calculated length of the sheetpile which depends on the coarseness of the mesh The bottom node of the sheetpile will be on the nearest node of the mesh in relation to the specified length To be sure that the reguired length is more or less egual to calculated length of the sheetpile there is the possibility to create a dummy layer boundary at the bottom of the sheetpile Generate Mesh All actions to generate an element mesh are now performed If the user returns to the previous menu the mesh will be renumbered along verticals to get a minimal bandwidth This means a minimal bandwidth for geometries most often encountered in geotechnics large width and small height The boundary nodes of the mesh will be determined Finally the program checks the created mesh by checking if the following formula holds ne 2 x nk 1 nr 2 1 where 12 of 61 Deltares 2 2 6 2 2 3 Getting Started ne number o
11. groundwater flow The sis Barends F B J LGM mededelingen no XIX DELFT GEOTECHNICS Bear J 1979 Hydraulics of Groundwater ISBN 0 07 0041 70 9 Engering F P H TUD rapport a free boundary problem in the theory of fluid flow through a porous dam Polubarinova Kochina P Y A Theory of groundwater movement Verruyt A Theory of groundwater flow Deltares 61 of 61
12. number O is reserved for the base A soil layer number is equal to the boundary number at the top of the layer The boundary with the highest number defines the soil top surface A material soil type must be defined for each layer except for layer O base Different layers can use the same material All the boundaries must start and end at the same horizontal co ordinates Boundaries should not intersect but they may coincide over a certain length All horizontal co ordinates on a boundary must be ascending that is the eguation X i 1 gt Xfi must be valid for each following pair of X co ordinates vertical parts are allowed PL lines may intersect and may coincide with each other over a certain length PL lines and layer boundaries may intersect All PL lines must start and end at the same horizontal co ordinate All X co ordinates on a PL line must be strictly ascending that is the eguation Xfi 1 gt X i must be valid for each following pair of X co ordinates no verti cal parts allowed ooo 0000 0000 One way for inputting geometry data is through the Geometry menu as explained in the Reference section section 4 3 This section describes an other way to create and manipulate geometry graphically using the tool buttons of the View Input window 7 3 View Input Window 40 of 61 Deltares 7 3 1 Graphical Geometry Input General To use the View Input option click the Geometry tab to acti
13. over the structure the erosion process eases down until water only is transported through the channels It is common to observe sand boils behind the dike which produce water alone However if a critical head difference is reached the erosion process continues and the structure may in the end collapse Figure 1 1 Deltares Systems website www deltaressystems com If the solution cannot be found there then the problem description can be e mailed preferred or faxed to the Deltares Systems Support team When sending a problem description please add a full description of the working environment To do this conveniently Open the program If possible open a project that can illustrate the question Choose the Support option in the Help menu The System Info tab contains all relevant information about the system and the software The Problem Description tab enables a description of the problem encountered to be added Support Deltares System Info Problem Description Please explain your issue here DeltaresSystems Rotterdamseweg 185 Phone 31 88 335 8100 P O Box 177 Fax 31 88 335 81 11 NL 2600 MH Delft E mail support deltaressystems nl Send Print Save As Figure 1 2 Support window Problem Description tab 6 of 61 Deltares 1 9 General Information After clicking on the Send button the Send Support E Mail window opens allowing sending current file as an
14. satisfy with the input just click the Next button to display the next input screen New Wizard Shape Selection New Wizard Select top layer shape by clicking on the desired picture lt Previous Next gt Cancel Help Figure 4 3 New Wizard window Top Layer Shape screen Deltares 23 of 61 MSeep User Manual In the second screen Top Layer Shape of the New Wizard window one of nine default top layer shapes can be selected A red frame indicates the selected shape Click the Previous button to return to the Basic Layout screen or the Next button to display the next input screen with shape specific input data New Wizard Shape Definition New Wizard Define measurements for top layer shape hl m 250 L1 m 250 L6 m 6 00 h2 m f250 L2 m 00 L7 m 1250 h3 m 1 00 L3 m 8 00 L8 m 300 h4 m 1 00 L4 m 400 19 m 250 L5 m 8 00 lt Previous ji Cancel Figure 4 4 New Wizard window Top Layer Specification screen In the third screen Top Layer Specification of the New Wizard window the sizes for the selected top layer shape can be specified New Wizard Material types 24 of 61 Deltares Input New Wizard Set material types Layer Nr Material Type 1 Gravel 2 Soft Clay y 3 Loose Sand ind 4 Peat y 5 Dense Sand v Set all layers to material type Soft Clay hud Apply Show properties of material type
15. two situations analysis of vertical two dimensional stationary groundwaterflow in layered soil struc tures taking into account all kinds of boundary conditions a phreatic surface and inter Deltares 1 of 61 1 2 2 3 1 3 MSeep User Manual nal wells or pumps This option from now on will be referred to as the Cross section method o analysis two dimensional steady flows in phreatic aguifers The assumption is that flow in an aguifer is essentially horizontal and therefore eguipotential surfaces are vertical All kinds of boundary conditions can be taken into account Internal wells or pumps can be added to the problem This option from now on will be referred to as the Phreatic aquifer method The Finite Element Method is used to solve the differential eguation of Laplace which repre sents the stationary groundwater flow A built in mesh generator creates an element mesh of iso parametric triangles for the geometry A direct solution method LDU decomposition is used to solve the set of eguations The final position of the phreatic surface is found using an iterative process For the Cross section method the finite element mesh is adapted each step see Verruyt Barends or Engering For the Phreatic aquifer method is permeability is adjusted each step see Bear 1979 Results As a result of the analysis MSeep can present results in a tabular and graphical form The tabular report
16. use this option to analyze the settled geometry at different stages as all other input is retained 26 of 61 Deltares Input 4 3 4 Geometry Import from Database 4 3 5 4 3 6 This option displays the Select geometry dialog for importing a geometry from an existing MGeobase database Select geometry Select 2 250801 250802 250803 250804 X 250805 250806 X 25080 X 2508b1 2508b2 X 2508b3 Cancel Help Figure 4 7 Select geometry window Again the imported geometry will replace the current one and will be displayed in the View Input window Geometry tab Note This option is only available when the correct database directory has been speci fied using the Locations tab in the Program Options window see section 3 2 3 For more information on MGeobase visit www deltaressystems com Geometry Export This option displays a standard Save As dialog that enables to choose a directory and a file name in which to save the current geometry The file will be saved in the standard geometry format for the Deltares tools Files in this format can be used in a multitude of Deltares geo programs such as D GEO STABILITY formerly known as MStab D SETTLEMENT formerly known as MSettle and D GEO PIPELINE formerly known as MDrill For a full description of these programs and how to obtain them visit www deltaressystems com Geometry Export as Plaxis DOS This option display
17. used in a boundary or PL line is selected and deleted the program deletes the point and its connected boundary lines as shown in Figure 7 16 It then inserts a new boundary that reconnects the remaining boundary lines to a new boundary After Figure 7 16 Example of deletion of a geometry point Before Deletion of a geometry element boundary boundary line geometry point PL line can result in automatic regeneration of a new valid geometry if the Automatic regeneration option is switched on When a line is selected and then deleted the line and its connecting points are deleted as shown in Figure 7 17 In addition the layer just beneath that boundary is deleted All other line parts that are not part of other boundaries will be converted to construction lines Figure 7 17 Example of deletion of a line Before 50 of 61 Deltares Graphical Geometry Input 7 5 3 Using the right hand mouse button When using the mouse to make geometrical manipulations the right mouse button enables full functionality in a pop up menu while the left button implies the default choice The options available in the pop up menu depend on the selected geometrical element and the active mode When the Select mode is active and the right hand mouse button is clicked the pop up menu of Figure 7 18 is displayed Properties Delete Del Ctrl z Ctrl Y Undo Redo View Preferences Statistic
18. will be displayed highlighted for example a point will be displayed as a large red box instead of a small black box The following remarks are relevant to selection accuracy and ambiguity Ambiguous selection A selection of geometrical elements can be ambiguous Figure 7 13 gives an example a user may want to select a point a boundary line a boundary or a PL line As several elements are in close proximity to each other MSEEP does not automatically select an element Figure 7 13 Selection accuracy as area around cursor In this case MSEEP reguires the user to assign the element that is to be selected by displaying a pop up menu Figure 7 14 with the available types of elements within the range of the selection click It is possible to select the element from this menu Select PL Line 1 Select PL Line 2 Select Boundary Line Figure 7 14 Selection accuracy as area around cursor Deltares 49 of 61 7 5 2 MSeep User Manual Clear selection It is possible to clear a selection by clicking in an area without geometry elements in the direct area Deletion of elements Click the Delete button X to delete a selected element This button is only available when an element is selected When a point is selected and deleted it and all lines connected to it are deleted as shown in Figure 7 15 After Figure 7 15 Example of deletion of a point Before When a geometry point a point
19. 01 1 0E 5 m s fine sand silt 1 0E 5 1 0E 8 m s peat 0 001 1 0E 6 m s layed clay 1 0E 6 1 0E 9 m s fine clay 1 0E 8 1 0E 10 m s The user of MSeep has to take into account that real soil layers are never homogeneous The above list of permeabilities give a rough indication When the permeability k in the porous medium differs in some points the medium is so called inhomogeneous If k only depends on the x or y direction the medium is anisotropic The potential is a handsome guantity because it doesn t depend on the gravity forces in the flowfield Horizontal and vertical flow have the same parametical relation The actual pressure can be calculated easily if the potential is known The following relation holds P P P9 Y 9 3 or in words pi zometric head pressure head elevation head where p is the unit weight of the fluid g is the acceleration of the gravity p is the potential or pi zometric hydraulic head y is the elevation head p is the water pressure Deltares 57 of 61 9 2 9 3 MSeep User Manual Cross section model Using the continuity equation and Darcy s law the Laplace equation is found for the description of two dimensional steady flow o Op o Op a wy 5 x S where kx and k are the permeabilities in x and y directions is the prescribed discharge along the boundaries or the discharge of internal sources The above differential equation is solved in MS
20. 0208 00 pa mom ka A iek 4 1 1 Project Model anaoa a 4 1 2 Project Properties k Ke 4 1 3 Project View Input File ke 4 1 4 Project View Mesh File e 42 Soil Men ooo coco adidas COAT K MSeep User Manual 4 2 1 Soil Materials a o 21 13 Geometry MeMi lt cc pom p aor Po aa aa artun Se a 22 43 1 Geometry New lt kk an csm 22 4 3 2 Geometry New Wizard e 22 4 3 3 Geometry Import o 26 4 3 4 Geometry Import from Database ooo a a 27 45 5 Geometry Expor isa ssa ee ewe Pe ewe eS 27 4 3 6 Geometry Export as Plaxis DOS 27 4 3 7 Geometry Limits o 28 43 8 Geometry Points 2 2 KL 28 4 3 9 Geometry Layers KAI 29 4 3 10 Geometry Check Geometry o A Ke 30 4 4 GeoObjects menu Ae 31 4 4 1 GeoObjects Discharges a a HL 31 4 4 2 GeoObjects Potentials 0 AL 31 4 4 3 GeoObjects Sheet Piles KKK 10 31 45 Water menu JLL O 32 4 5 1 Water properties Ln q 32 Calculations 33 5 1 Calculation Start Tay 4 33 5 1 1 Potential calculation Web lt lt 33 View Results 35 6 1 Report Selection MA We 35 6 2 Report lt lt SO ooo 35 6 3 Contour Potentials NAPIN LI KKKA NANA 36 Graphi
21. 1 To enter a project identification and to alter default project settings Soil menu section 4 2 To define the properties of the soil types o Geometry menu section 4 4 To add the MSeep specific geometry data on the slip plane and optional geotextiles o GeoObjects menu section 4 4 Water menu section 4 5 To define the degree of consolidation modify the unit weight or import pore pressures from a MSeep analysis Calculation menu chapter 5 To start the determination of the critical slip circle and the stress distribution along the plane o View results menu chapter 6 Inspect the location of the critical circle and the distri bution of different stress and pressure components along the slip plane You can use the examples chapter 8 as a convenient starting point for your own project 4 1 Project menu On the menu bar section 2 2 1 click Project to display the following menu options Calculation type section 4 1 1 o Properties section 4 1 2 to enter a project identification and change the default set tings for data visualization The default project settings will be sufficient for regular stability analyses o View input file section 4 1 3 to inspect the ASCII input file of MSeep o View mesh file section 4 1 4 4 1 1 Project Model Model Bs Model C Steady state model phreatic aquifer Erosion I Enable erosion design Figure 4 1 Model window Deltares 19
22. DAS ssojo e 195 SSOJO 0 9 daaSI d33SW enueu Joy ajdwex3 Deltares 55 of 61 8 2 MSeep User Manual Example 2 Aquifer example Example 2 is the phreatic aquifer of example 1 In the centre of the geometry one point 50 20 has been given with a fixed potential The difference is obvious To compare the two methods example 3 has been added Input View W200558 Jajnbe oyessyd y les Jeynbe 0 9 deasw d33SW enueu Jo ajdwex3 56 of 61 Deltares 9 Background information 9 1 Below you will find background information on the following topics o Darcy s Law section 9 1 Cross section model section 9 2 o Phreatic aguifer model section 9 3 Pore pressure used in MSeep section 9 4 Darcy s Law Darcy s law gives a relation between the specific discharge g and the hydraulic gradient along a streamline s for laminar flow q k dy ds 9 1 The constant k is the hydraulic permeability and depends on soil properties and the pore fluid Darcy s law is valid as long as the Reynolds number Re does not exceed some value between 1 and 10 Re q x D v 9 2 where v viscosity water D medium grain size The soil structure can be composed of several soil layers divided by layer boundaries The permeability has to be specified for each layer An indication of the permeability for different kinds of soils gravel 0 1 0 01 m s gravel sand 0
23. Deltares systems Deltares Enabling Delta Life 7 User Manual MSeep Two dimensional stationary groundwater flow User Manual Version 15 1 Revision 41593 24 September 2015 MSeep User Manual Published and printed by Deltares telephone 31 88 335 82 73 Boussinesqweg 1 fax 31 88 335 85 82 2629 HV Delft e mail infoOdeltares nl P O 177 www https www deltares nl 2600 MH Delft The Netherlands For sales contact For support contact telephone 31 88 335 81 88 telephone 31 88 335 81 00 fax 31 88 335 81 11 fax 31 88 335 81 11 e mail sales deltaressystems nl e mail support deltaressystems nl www http www deltaressystems nl www http www deltaressystems n Copyright O 2015 Deltares All rights reserved No part of this document may be reproduced in any form by print photo print photo copy microfilm or any other means without written permission from the publisher Deltares Contents Deltares Contents 1 General Information A AA AE N Aak RM tn Ed oe otin K a Te FOES gt lt mm sa GTK RE a T we E he A JAK a 1 2 1 Sign agreements se bae OPINAS va lt xx 6 84 A 808 ee e Ee KG 1221 Solprofile seu ms maca A 1 2 2 2 Calculation Methods 1223 Rss a sodon tamaa 08 2 oaa SOK A ee ae US AMO is m k e ai Roi AAA ee VA Limitations gt xico ada koa M 08 41 AO ele k a asia 106 N 1 5 Minimum System Requirements 2 e 1 6 Definitions and
24. Point number column because the co ordinate columns are purely for informative purposes To manipulate the co ordinates of the points select the Points option in the Geometry menu see section 4 3 8 Note When inserting or adding a boundary all points of the previous boundary if this exists Deltares 29 of 61 4 3 10 MSeep User Manual are automatically copied By default the material of a new layer is set equal to the material of the existing layer just beneath it The Materials to layers tab enables to assign materials to the layers Layers 53 Boundaries Materials Available materials Layers Name Number Material name Soft Clay N 5 Dense Sand NN Medium Clay gt __ Stiff Clay 13 Loose Sand 2 Soft Clay Loose Sand OE Gravel Dense Sand S _ Sand EN Gravel Loam Muck Undetermined Figure 4 12 Layers window Materials tab On the left of the screen a list containing all defined materials see the Materials option in the Soil menu section 4 2 is displayed On the right a list of all defined layers together with their assigned materials if available is displayed The layers are listed from top to bottom as displayed in the View Input window Geometry tab gt To assign a material to a layer first select that layer on the right of the window Then select the required material on the left of the window Finally click the Assign button Every change made
25. Symbols GPU 1 7 Getting Help 47 3m 1 8 GettingSupport 4g 7 Osee 19 Deltares lt lt lt lt HB Bn 1 10 Deltares Systems 22 A e 1 11 Rijkswaterstaat oN 1 12 On line software Citrix lt A Ae 2 Getting Started 2 1 Starting MSeep lt lt Yo o kk 2 2 Main window Mim WD 2 21 Themenubar WA Sy eee ees 2 2 2 Theiconbar TR S F N lj ALL 2 2 3 Input View SORI NANNINI VV KKKA 2 2 4 Input am lt WR 2 VNA ee 2 2 5 Boundary Gomditiogs WA Ke 226 Mesh Y Mx WD L LVV VVV 2 2 6 1 Generate Mesh 2 KK ke 2 2 6 2 CheckMesh 0 23 Files SRP lt 4 0 4 3 General 3 1 File ygu WM W o o o o o o o o o o aN 22 TOREO lt lt lt lt Md KP PMI an osan alan s 32 Tools View W lt k es 3 2 2MlLoois Generale 2 ka A 3 23 Tooley Locations o 2 3 2 4 Toolstjkamgtuage lt kkk ke 4 33 Help Mena NWR ee 02 KPR a m PPA a aa SA Manyalo 2 02 088868 A eS ms 3 3 2 Verification Report gt s o a acao coa a Kuo rako a a NN 3 3 3 Deltares Systems Website oaoa a a a JaA SUPPOR od ma na Ge moe Pla we Rod ge ae ae sk a me 33 5 AboutMSeep 2 k 6 a aaa aa a a D a a a a om 4 input al Project NIEMI o gt os 23808
26. ached the results are written to the output file and the dump file Sometimes the accuracy will not be reached because the phreatic block becomes to thin and is adjusted to 5 of the original height The maximum error indicates the absolute greatest difference between the potential and the elevation head in any of the phreatic nodes Only engineering judgement can decide whether the phreatic surface is realistic or not A phreatic surface can never drop through a boundary layer as a result of the mesh being adapted This is one of the most important limitations of MSeep Also the accuracy will not reduce if due to discharge or rainfall the phreatic surface partly coincides with the upper boundary layer The potential will sometimes be higher than the elevation head Deltares 33 of 61 MSeep User Manual Phreatic aquifer Here too two additional parameters have to be entered The required accuracy 1 00000E 3 default value Number of adjustments 15 default value The highest accuracy which can be inputed is 10 m and the minimum number of adjust ments is 3 The accuracy represents the maximum difference between the average elevation head allowed for all nodes in to successive iterations The number of adjustments is not so important When the accuracy is not reached within this number a question will be asked to give a new number of adjustment During this iterative process to determine the transmis
27. al numbers sheet pile numbers and the layer numbers Layers Choose either the layer numbers material numbers or material names to display Mark the checkbox Save as default if you want to use the current settings every time you start MSeep Project View Input File On the menu bar section 2 2 1 click Project and then choose View Input File to display an overview of your input data The data will be displayed in the MSeep main window Click 5 to print the file Project View Mesh File On the menu bar section 2 2 1 click Project and then choose View Mesh File to display an overview the mesh data The data will be displayed in the MSeep main window Click 5 to print the file The mesh file is a standard file at Deltares The file has the following structure number of nodes number of elements o the node numbers with x and y coordinates o the element numbers with their layer number and the three node numbers forming the element Soil Menu Soil Materials The Soil Material option in the Soil menu gives access to the input window to define the soil type properties The soil types themselves have been defined during the geometry modeling chapter 7 In the table presented here the permeability in x and y direction can be specified in m s for up to 40 different kinds of soil types Each soil type must be given an unique name You have to define at least 1 soil type but you are free to add more up to 40
28. cal Geometry Input 39 7 1 Geometrical objects IBY WR WMh 39 7 1 1 Geometry elements lt sa Ke 39 7 1 2 Construction elements he 39 7 2 Assumptions and restrictions e 40 7 3 View Input Window RR oasa K KA Ae 40 7 3 1 Coca 41 7 3 2 Biliitons Mm lt YL VVV K KV N Ne 42 7 3 3 MA MEE 44 7 4 Geometry modeling ss 46 7 41 Create a new geometry k ke 46 7 4 2 Seitse MPV ALA 46 7 4 3 Draw lay AP lt lt es 47 7 4 4 Generate layers e 48 75 Graphical manipulation lt lt lt lt s s sa mesecne aa cpa sa sa d ma 49 7 5 1 Selection of elements ne 49 7 5 2 Deletion of elements K Ke 50 7 5 3 Using the right hand mouse button ss L 51 7 5 4 Dragging elements e 53 Examples 55 8 1 Example 1 Cross example L 55 8 2 Example 2 Aquifer example ne 56 Background information 57 S Beavers baw be wea a ee S S 57 9 2 Cross section model o ee 58 Deltares Contents 9 3 Phreatic aquifer model 9 4 Pore pressure used in MSeep Bibliography Deltares MSeep User Manual vi Deltares List of Figures List of Figures 1 1 1 2 1 3 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 4 10 4 11 4 12 4 13 6 1 6 2 6 3 6 4 rA 72 7 3 7 4 13 7 6 FA 7 8 78 7 10 7 11 7 12 7 13 7 14 7 15 7 16 LAF 7 18 7 19 7 20 121 ie 7 23 Deltares Deltares Systems website www deltaressystems com
29. color and name of the material in the adjacent Geometry window see Figure 7 5 Geometry Input Boundary Conditions n Edit 2 ie je 3 En He k HAR 3 ja pa Materials E icey 2 sand FEE 3 grave ix 15 271 24 500 Edit Current object None FAT On x 59 855 3 260 Edit Current object None Figure 7 5 View Input window Geometry tab legend displayed as Material Names Unlike the standard colors used to display layers with their layer colors it is possible to define different colors used when displaying materials To change the color assigned to a material right click the material box The menu from Figure 7 6 is displayed Properties Material Colors Layer Numbers Material Numbers w Material Names Figure 7 6 Legend Context menu for legend displayed as Materials When selecting Material Colors the Color window appears Figure 7 7 in which the user can pick a color or even define customized colors himself by clicking the Define Custom Colors button Deltares 45 of 61 MSeep User Manual Color Basic colors Hue 117 Red 12 uN Sat 240 Green 255 ColorlS olid Lum 1267 Blue 2397 Add to Custom Colors Figure 7 7 Color window 7 4 Geometry modeling 7 41 Create a new geometry There are two ways to create a new geometry without the wizard Open the Geometry menu and choose New Open the
30. de In this mode you can graphically select a previously defined grid load geotextile or forbidden line in the Input View with the left mouse button You can then delete the item or modify the properties via dragging resizing or a menu that appears when clicking the right mouse button Zoom in Enlarge the drawing Zoom out Reduce the drawing size Zoom area Undo zoom Restore the previous view Zoom limits Show the complete drawing 2 2 4 Input In this view the prescribed discharges and potentials will be shown in the geometry 10 of 61 Deltares Getting Started 2 2 5 Boundary Conditions Successively the next two steps must be passed 1 Line menu Boundary conditions along the borders of the geometry 2 Node menu Definition of the conditions to apply at intersection nodes between bound ary lines with different conditions ad 1 Lines menu Using the geometry data the outer border of the geometry will be diveded into several pieces This is done by looking at the top layer and the bottom layer of the geometry The left limitation of the geometry forms the first part after which each part will be treated clockwise For each part of the boundary the following conditions can be specified Impermeable boundary no in or outflow Boundary with discharge A constant discharge will be divided on all the nodes of this boundary Boundary with potential A f
31. e to end a PL line by double clicking the left hand mouse button In this case the automatically added end line will always end at the right limit To stop adding PL lines select one of the other tool buttons or click the right hand mouse button or press the Escape key Zoom in Click this button to enlarge the drawing then click the part of the drawing which is to be at the center of the new image Repeat if necessary Zoom out Click this button then click on the drawing to reduce the drawing size Repeat if necessary Zoom rectangle Click this button then click and drag a rectangle over the area to be enlarged The selected area will be enlarged to fit the window Repeat if necessary Measure the distance between two points 22 Click this button then click the first point on the View Input window and place the cross on the second point The distance between the two points can be read at the bottom of the View Input window To turn this option off click the escape key Add calculation vertical Click this button to graphically define the position of a vertical Tools panel Undo zoom Click this button to undo the zoom If necessary click several times to retrace each consecutive zoom in step that was made Zoom limits Click this button to display the complete drawing 2 Same scale for X and Y axis Click this button to use the same scale for the horizontal and vertical directions Aut
32. eatic surface The rainfall will be divided on all the nodes of this boundary Deltares 11 of 61 2 2 6 2 2 6 1 MSeep User Manual ad 2 Node menu For all the intersection points on the borders where the conditions differ on both sides a selection must be made to which boundary this point belongs For vertical boundaries special attention has to be given to the point at the top When the vertical boundary has a so called closed condition and the boundary to the left or to the right has a Phreatic seepage boundary condition the intersection point node has to belong to the phreatic surface for it will be able to move A picture will be drawn on the screen showing the boundary conditions For each type of condition another line type will be used Pumps wells and potential points are also drawn at their specified position which may differ from the position they will have in the mesh Note IMPORTANT If the geometry is changed there may be new boundaries The user has to check all the boundary conditions before a calculation is performed Only limited tests can be made during the test phase of a calculation Mesh To create a mesh the global element height along the left and right side of each layer has to be specified the unit is meters Furthermore a height width ratio for the elements in each layer can be given between 0 1 and 10 0 A ratio of 10 gives high and thin elements and a ratio of 0 1 gives thin
33. eck geometry section 4 3 10 Check the validity of the geometry 00000 000060 Geometry New Select this option to display the View Input window Geometry tab showing only the geom etry limits with their default values of the geometry It is possible to now start modelling the geometry However it is possible to create a new geometry faster and easier using the Geometry Wizard This wizard involves a step by step process for creating a geometry Geometry New Wizard To use the geometry wizard open the Geometry menu and choose New Wizard This option will guide the user step by step through the process of creating a geometry Using this wiz ard significantly reduces time and effort required to enter data The wizard uses predefined shapes and soil types If more flexibility is required the View Input window Geometry tab can also be used section 7 3 in a more general way New Wizard Basic Layout 22 of 61 Deltares Input New Wizard me Se Define measurements basic layout Ground Level Phreatic Level Limit Left Limit Right Limit left m 0 00 Limit right m 75 00 Number of layers max 10 E E Ground level m foo Phreatic level m foo Cancel Help Figure 4 2 New Wizard window Basic Layout In the first screen Basic Layout ofthe New Wizard window the basic framework of the project can be entered The graphic at the top of the window explains the required input When
34. eep by using the finite element method see See The position of the phreatic surface is unknown beforehand MSeep determines the phreatic surface on an iterative way by using the two boundary conditions along this surface the phreatic surface is a streamline and the pressure is egual to the atmospheric pressure During this iterative process for each node on the phreatic surface or seepage face the guan tity and direction of the specific discharge will be determined A negative discharge means within MSeep an outflow and so the concerning nodal point belongs to the seepage face The finite element mesh will be adapted each step until the phreatic surface satisfies both conditions In this manual this will be called the breathing of the element mesh see Verruyt and can finally result in a deformed element mesh see graphical output Phreatic aguifer model The geometry of most aguifers is such that they are thin relative to their horizontal dimensions see Bear 1979 In 1863 Dupuit based his assumptions on the observation that in most groundwater flows the slope of the phreatic surface is very small This assumption is eguivalent to assuming the equipotential surface are vertical and the flow is essentially horizontal De vertical flow components are neglected The discharge per unit width in the aquifer is g T A 9 5 where transmissivity i e k 2 is the elevation head k is the permeability Us
35. er having tested the input the calculation starts and on the screen the three steps to solve the differential equation are shown 1 Create system matrix 2 Decomposition of system matrix 3 Solve set of equations The results will finally be written to the output file and the dump file Cross section Potential calculation with a phreatic surface After the calculation is started and the input is tested two parameters have to be entered The required accuracy 1 00000E 3 default value Number of adjustments 15 default value The highest accuracy which can be inputed is 10 m and the minimum number of adjust ments is 3 The accuracy represent the maximum difference between the potential and the elevation head allowed for all nodes on the phreatic surface not on the seepage surface When the phreatic surface is not determined with a high accuracy there will arise local unbal ance in the discharges of the nodes near the phreatic surface Especially when a streamline calculation is performed this unbalance will disturb the picture of the streamlines The number of adjustments is not so important When the accuracy is not reached within this number a question will be asked to give a new number of adjustment During this iterative process to determine the position of the phreatic surface the geometry will be drawn on the screen with the old and new position of the phreatic surface When the required accuracy is re
36. er is not affected by those conversions The most common cause of invalid poly lines is that they are not part of a continuous poly line running from limit to limit Sometimes lines appear to start end at a limit without actually being on a limit Figure 7 12 gives an example on the left geometry 1 the end of the line seems to coincide with the boundary However zooming in on the point geometry 2 on the right reveals that it is not connected to the boundary Therefore the geometry is considered invalid 48 of 61 Deltares Graphical Geometry Input a 1 2 Figure 7 12 Example of invalid point not connected to the left limit It is possible to correct this by dragging the point to the limit while the specific area is zoomed in or by selecting the point clicking the right hand mouse button choosing the Properties option in the pop up menu section 7 5 3 and making the X co ordinate of the point egual to the X co ordinate of the limit 7 5 Graphical manipulation 7 5 1 Selection of elements After selecting a geometry element it is possible to manipulate it In order to be able select a geometry element the select mode should be active Then it is possible to select an element by clicking the left hand mouse button To select a layer click on the layer number material number or material name depending on the option chosen in the Properties dialog in the Project menu When successfully selected the element
37. etching geometry creation and geometry manipulation Each step can be started by using line shaped construction ele ments section 7 1 2 to add line drawings After converting these drawings to valid geometry parts the specific geometry elements created can be manipulated section 7 1 1 Geometry elements Geometry can be composed from the following geometry elements Points A point is a basic geometry element defined by its co ordinates As stated earlier the geometry is restricted to two dimensions allowing to define X and Z co ordinates only Boundary lines A boundary line is a straight line piece between two points and is part of a boundary Boundaries A boundary is a collection of connected boundary lines that forms the continuous boundary between layers Layers A layer is the actual soil layer Its geometrical shape is defined by its boundaries and its soil type is defined by its material Materials A material defines the actual soil material or soil type It contains the parameters belonging to the soil type such as its unsaturated weight and its saturated weight A material can be connected to a layer in order to define the soil type of the layer Limits A limit is a vertical boundary defining the end at either the left or right side of the geometry It is defined by an X co ordinate only Note that this is the only type of element that cannot be deleted Adding moving and deleting t
38. f elements nk number of nodes nr number of boundary nodes In addition the contact matrix needed to solve the set of equation by the LDU decomposition method is made Sometimes an ERROR MESSAGE can occur on the screen Problem too big This means that due to the geometry and the number of nodes in the mesh the system matrix is full meaning that the problem is too big for MSeep The user has to reduce the number of nodes and elements Note When a phreatic boundary is specified the user has to take into account that the mesh in the top layer will be adapted breathing In other words the finite element mesh deforms The bottom boundary of this breathing bloc of the mesh is the underlying layer boundary Sometimes it is recommended to create a fictive layer boundary to have a better bottom boundary of this phreatic element bloc see Demo 1 Check Mesh With this option a check is performed on the generated mesh At this moment the only check performed is a check on bad shaped elements These are elements that have a bad height width ratio greater than 1 3 In MSeep these elements do not have a negative influ ence on the calculation Files sel Input file ASCII Contains the MSeep specific input After interactive generation this file can be reused in subsequent MSeep analyses geo Input file ASCII Contains the geometry data that can be shared with other M Series programs gem Mesh f
39. file 107 Other constants in MSEEP width of a sheet pile i 0 05 m accuracy of the co ordinates of the geometry i 0 01m accuracy of the co ordinates of the element mesh nodes which lie within this distance are put together 4 0 0001 m adaptation factor of the phreatic surface each iteration i 0 67 Limitations due to the numerical model MSeep has some limitations which can not be checked sufficiently or which are due to the solution techniques used in MSeep Perhaps some of these limitations will be removed in a new version or better checks will be provided o very slanting boundaries which are almost vertical will cause badly shaped ele ments Bad elements can cause local water unbalance In MSeep bad elements are triangles that are either too flat or thin The ideal element is an equilateral triangle local refinement generates extra refinements nodes per element There is no general test to check if such a node already exists This means that a lot of double nodes are created during refinement When the mesh menu is left all the nodes are sorted and the double nodes are removed o aphreatic line can never drop through a layer boundary MSeep checks that the minimal height of the phreatic block will be at least 5 of its original height Deltares 3 of 61 MSeep User Manual o for sheet piles the user has to specify a required length before any refinement is performed MSeep searches for the nearest node of
40. ft soils sand clay and peat and management of the geo ecological consequences which arise from these activities Again and again subsoil related uncertainties and risks appear to be the key factors in civil engineering risk management Having the processes to manage these uncer tainties makes Deltares the obvious Partner in risk management for all parties involved in the civil and environmental construction sector Deltares teams are continually working on new mechanisms applications and concepts to facilitate the risk management process the most recent of which is the launch of the concept GeoQ into the geotechnical sector For more information on Deltares visit the Deltares website www deltares nl Deltares Systems Deltares Systems is a Deltares company The company s objective is to convert Deltares s knowledge into practical geo engineering services and software Deltares Systems has de veloped a suite of software for geotechnical engineering Besides software Deltares Systems is involved in providing services such as hosting online monitoring platforms hosting on line delivery of site investigation laboratory test results etc As part of this process Delft GeoSys tems is progressively connecting these services to their software This allows for more stan dardized use of information and the interpretation and comparison of results Most software is used as design software following design standards This however does not guara
41. g and dragging the mouse Add point s to boundary PL line Click this button to add points to all types of lines lines poly lines boundary lines PL lines By adding a point to a line the existing line is split into two new lines This provides more freedom when modifying the geometry Add single lines s Click this button to add single lines When this button is selected the first left hand mouse click will add the info bar of the new line and a rubber band is displayed when the mouse is moved The second left hand mouse click defines the end point and thus the final position of the line It is now possible to either go on clicking start and end points to define lines or stop adding lines by selecting one of the other tool buttons or by clicking the right hand mouse button or by pressing the Escape key Add polyline s Click this button to add poly lines When this button is selected the first left hand mouse click adds the starting point of the new line and a rubber band is displayed when the mouse is moved A second left hand mouse click defines the end point and thus the final position of the first line in the poly line and activates the rubber band for the second line in the poly line Every subsequent left hand mouse click again defines a new end point of the next line in the poly line It is possible to end a poly line by selecting one of the other tool buttons or by clicking the right hand mouse button or b
42. he above mentioned elements are subject to the conditions for a valid geometry see section 7 2 For example while dragging selected geometry elements the program can perform constant checks on the geometry validity section 7 4 4 Invalid parts will be shown as construction elements thick blue lines Construction elements Besides the D Series geometry elements section 7 1 1 special construction elements can also be used for sketching the geometry graphically These elements are not a direct part of Deltares 39 of 61 7 2 MSeep User Manual the geometry and the restrictions on editing adding moving and deleting these elements are therefore far less rigid The only restriction that remains is that these elements cannot be moved and or defined beyond the limits of the geometry Lines A line Construction consists of a starting point and end point both de fined by a left hand mouse click in the graphic input screen Poly lines A poly line Construction consists of a series of connected lines all de fined by a left hand mouse click in the graphic input screen Construction elements will be displayed as solid blue lines Valid constructions elements are converted to geometry elements as soon as the geometry is re generated For more information on adding lines and poly lines see section 7 4 Assumptions and restrictions During geometrical modeling the program uses the following assumptions Boundary
43. if they resulted in an invalid geometry Geometry Points Use this option to add or edit points that can be used as part of layer boundaries or PL lines ja D Points 3 A X Co ordinate Y Co ordinate m m 4s 1 0 000 10 000 qe 2 75 000 10 000 3 0 000 8 000 4 75 000 8 000 5 0 000 5 000 6 75 000 6 000 ari 0 000 4 000 B 8 75 000 4 000 3 0 000 2 000 110 75 000 2 000 11 0 000 0 000 12 9 000 0 000 13 9 833 1 000 14 10 667 1 000 maga 11 500 0 000 16 14 500 0 000 Figure 4 9 Points window A point is a basic geometry element defined by its co ordinates Since the geometry is re stricted to two dimensions it allows defining an X and Y co ordinate only Note When a point is to be deleted D SETTLEMENT will check whether the point is used as part of a PL line or layer boundary If so a message will be displayed 28 of 61 Deltares 4 3 9 Input Confirm x At least one of the selected points is used in a boundary PI Line line Deleting such point s might result in deletion of the boundaries PI Lines line using such point s Continue this operation Figure 4 10 Confirm window for deleting used points When Yes is clicked all layer boundaries and or PL lines using the point will also be deleted Every change made using this window Figure 4 9 will only be displayed in the underlying View Input window Geometry tab after closing thi
44. ile contains the finite element mesh set Working file ASCII Contains settings data sed Dump file ASCII Contains an echo of the input and the calculation results Deltares 13 of 61 MSeep User Manual 14 of 61 Deltares 3 General 3 1 This part of the manual contains a detailed description of the available menu options for input calculation and viewing results The examples in the tutorial section provide a convenient starting point for familiarization with the program File menu Besides the familiar Windows options for opening and saving files the File menu contains a number of options specific to MSeep o copy active window to clipboard Use this option to copy the contents of the active window to the Windows clipboard so that you can paste them into another application export active window Use this option to export the contents of the active window as a Windows Meta File wmf a Drawing Exchange File dxf or a text file txt page setup The Page Setup option in the File menu allows you to define the way you want to print MSeep plots and reports Here you can define the printer paper size orientation and margins For plots you can also specify whether and where axes are required Click 40 page to get MSeep to define how the data can best fit on the print preview active window Display a preview of the printout of the current contents of the Outline View wind
45. ine of the in and outflow of the problem is very important for interpreting the final results Positive discharge means inflow a negative discharge means outflow The output file is an ASCII file with extension SED 34 of 61 Deltares 6 View Results 6 1 On the menu bar click Results to display the following menu options You use these options to view the results that were generated by the MSeep calculation chapter 5 Report section 9 3 to view a tabular report Contour Potentials section 9 4 to display a contour plot of the potential or the pressure Report Selection On the menu bar click Results and then choose Report Selection to open the corresponding input window in which the content of the final report can be selected v 1 Table of Contents v 2 Input Data v 2 1 Calculation v 2 2 Materials v 2 3 Layers v 2 4 Water Properties v 2 5 Boundary Lines v 2 6 Prescribed Nodes a v 3 Calculation Results v 3 1 Calculation Information v 3 2 Calculated Discharges per Boundary 3 3 Water Surface v 3 4 Calculated Node Data v 3 5 Velocities Page numbers in Table of Contents slows down report generation Select All Deselect All Figure 6 1 Report Selection window 6 2 Report On the menu bar click Results and then choose Report to open the Report window displaying the selected results section 9 2 of the calculation Click the Print active window button E
46. ing the continuity eguation and the discharge we obtain for an inhomogeneous anisotropic aguifer o Op o p az 0 as By 5 x o lt 58 of 61 Deltares 9 4 Background information where Tr is the transmissivity in x and y direction kz ky are permeabilities in x and y direction Q is the prescribed discharge along the boundaries or internal sources The above non linear equation is solved in MSeep by linearization and using the finite element technique The transmissivity depends on the elevation head _ which is unknown beforehand MSEEP solves it on an iterative way by assuming that at the first iteration the transmissivity is equal to the permeability So the elevation head is equal to 1 m Each step the transmissivity is updated in each element of the mesh using the calculated hydraulic head _ The phreatic boundary condition is now incorporated in the equation of flow in the aquifer This is referred to as the hydraulic approach Pore pressure used in MSeep MSeep offers the following methods to supply the pore water pressure for the stability program D GEO STABILITY MSeep determines the phreatic surface and the pore pressures at the lateral boundaries of the slices directly from the imported data Deltares 59 of 61 MSeep User Manual 60 of 61 Deltares Bibliography Gebruikershandleiding SEEP 1 Grondwaterstromingsproblemen Akker C van de Numerical analysis of the stream function in plane
47. ischarge the user can also specify a fixed potential in an internal point The potential refers to an elevation head at y 0 where the atmospheric pressure is set to 0 Note Remarks on Discharges and Potentials 1 Fordischarges and potentials the user has to take into account that an internal point can change position if it lies inside the breathing block of the phreatic surface Sometimes a dummy layer boundary has to be specified to prevent this movement of points 2 Due to the coarseness of the mesh the user has to pay attention to the the following o the discharge of two or more wells or pumps can be set to the same nodal point The discharges will be added up one or more prescribed potentials can be set to the same nodal point Only the last one is used o adischarge of a pump or well and the prescribed potential can be set to the same node The discharge will be removed and only the potential will be prescribed to that node inthe output file the nodes are marked with an arrow lt if one of these conditions apply to that node GeoObjects Sheet Piles You can open the input window for forbidden lines either via the button at the left hand side of the Input View window section 2 2 3 or from the menu bar section 2 2 1 Geometry and then choose Slip Circle Definition MSeep uses forbidden lines as a constraint during the automatic determination of the critical slip circle The slip circle is not allowed to in
48. ixed potential will be applied on all the nodes of this boundary Phreatic Seepage Boundary The position of the nodes on this boundary will be adapted until the potential is greater than or egual to the elevation head If the nodal point lies on the slope and the po tential becomes greater than its elevation head a seepage will occur If the potential is less than the elevation head the position of the node will be changed until the potential is egual to the elevation head With vertical boundaries the above mentioned process is only valid for the top node All the nodes between get a fixed potential equal to their elevation head it is a seepage face Phreatic Closed Boundary As above except when the potential is greater than the elevation head There will be no outflow of the fluid no seepage in other words there can be an overpressure on that boundary Overtopping Boundary Along this boundary all the nodes get a potential egual to the elevation head Next Boundary line The default value of the last specified condition will remain and the next line selected Exit lines menu End boundary condition input on boundary lines and continue with Node Menu These types of conditions are not available for the Phreatic aguifer method Note For the Phreatic Seepage boundary a rainfall in meters year can be specified Nor mally this rainfall has hardly any influence on the phr
49. l on the icon bar to print the report Use the Export Report option in the File menu to export the report in RTF PDF TXT or HTML format The report has its own toolbar Those four buttons enable the user to zoom in to zoom out po pa 15 E to zoom the full page or to zoom the page width Those four buttons enable the user to browse through the w w Io E report by respectively moving to first page moving to previous page moving to next page or moving to last page Deltares 35 of 61 MSeep User Manual Another way of quickly browsing through the report is by en Page 18 of 19 tering a page number in the input field on the toolbar and pressing the Enter key The output file consists of the following elements Input data O program name and version update company name license and copy number O title of the problem O names of the used files o echo of the input Calculation data 6 3 Contour Potentials On the menu bar click Results and then choose Contour Potentials to open the Contour Po tentials window displaying a contour plot of the potential Figure 6 2 the velocity Figure 6 3 or the pressure Figure 6 4 E Contour Potentials Jl Data Dato ONE Options gt gt Edit 2 20 so ke E 20 Lio jo 19 20 20 40 30 H Potential m xI E s41m PP 5 82 207 6 23m 5E SES sem EN 7 05m Too EJ 3 7 46 m o ii 3 7 87 m el Eee 828m LN 8 69 m l
50. ltares A group of 70 people in software develop ment ensures continuous research and development Support is provided by the developers and if necessary by the appropriate Deltares experts These experts can provide consultancy backup as well If problems are encountered the first step should be to consult the online Help at www deltaressystems com menu Software Different information about the program can be found on the left hand side of the window Figure 1 1 Deltares 5 of 61 MSeep User Manual Deltares Enabling Delta Life 75 lt Back to software Features Demo Screenshots Service packages Other related software Documentes da Paper Numerical computation of E Areas of expertise Software Academy Facilities Aboutus Contact MSeep In delta areas the land is protected from floods and high tides by dikes In general these are constructed of impervious clays and built on a sandy aquifer as subsoil Such structures are vulnerable to an erosion effect called piping The actual word piping refers to the development of shallow channels in the sand below the dike which begins at the downstream side of the structure Here often a ditch is situated with a burst bottom due to excess water pressures The subsequent erosion process develops backwards to the high head side The natural nonhomogeneity in the soil causes the shallow channels to be irregularly shaped Below a critical value of the hydraulic head
51. me each time or you can specify a file name each time the data is saved 3 2 3 Tools Locations Working directory You can either automatically make the last used directory your work ing directory or you can specify a default path 3 2 4 Tools Language Interface Language Currently only English is available Output Language Output of a tabular report in Dutch or English 3 3 Help menu The Help menu allows access to different options 3 3 1 Manual Select the Manual option from the Help menu to view the manual 3 3 2 Verification Report Select the Verification Report option from the Help menu to view the verification report 3 3 3 Deltares Systems Website Select Deltares Systems Website option from the Help menu to visit the Deltares Systems website www deltaressystems com for the latest news 3 3 4 Support Use the Support option from the Help menu to open the Support window in which program errors can be registered Refer to section 1 7 for a detailed description of this window 16 of 61 Deltares General 3 3 5 About MSeep Use the About option from the Help menu to display the About MSeep window which provides software information for example the version of the software Deltares 17 of 61 MSeep User Manual 18 of 61 Deltares 4 Input Before the analysis can be started the data for layers soil properties and loads need to be inputted through via menus o Project menu section 4
52. nd Layer 5 Peat lt Previous i Cancel Help Figure 4 6 New Wizard window Summary screen The last screen Summary of the New Wizard window displays an overview of the data entered in the previous wizard screens If necessary click Previous to go back to any screen and change the data as required Click Finish to confirm the input and display the geometry in the View Input Geometry window In this window the geometry can be edited or completed graphically as described in section 7 3 Of course the Geometry menu options can also be used for this purpose section 4 3 If the input contains errors the Error Report window opens when clicking the Finish button showing the list of encountered errors and giving for each of them a solution Click Close to close the Error Report window and use the Previous button of the New Wizard window to change the data as required Geometry Import This option displays a standard file dialog for selecting an existing geometry stored in a ge ometry file or in an existing input file for D SETTLEMENT D GEO STABILITY formerly known as MStab D GEO PIPELINE formerly known as MDrill or MSeep For a full description of these programs and how to obtain them visit www deltaressystems com When selecting the geometry it is imported into the current project replacing the current geometry The imported geometry is displayed in the View Input window Geometry tab It is also possible to
53. ne of the Add buttons By selecting one of these buttons one switches to the Add mode As long as this mode is active the user can add the type of element which is selected Zoom The Zoom mode allows the user to view the input geometry in different sizes By selecting one of the Zoom buttons or the Pan button one activates the Zoom mode While in this mode the user can repeat the zoom or pan actions without re selecting the buttons It is possible to change modes in the following ways When in Add or Zoom mode it is possible to return to the Select mode by clicking the right hand mouse button or by pressing the Escape key or by clicking the Select mode button To activate the Add mode select one of the Add buttons To activate the Zoom mode select one of the Zoom buttons or the Pan button Note The current mode is displayed on the info bar at the bottom of the View Input window Deltares 41 of 61 MSeep User Manual 7 3 2 Buttons Edit panel 42 of 61 Select and Edit mode In this mode the left hand mouse button can be used to graphically select a pre viously defined grid load geotextile or forbidden line Items can then be deleted or modified by dragging or resizing or by clicking the right hand mouse button and choosing an option from the menu displayed Pressing the Escape key will return the user to this Select and Edit mode Pan Click this button to change the visible part of the drawing by clickin
54. ntee a design that can be executed successfully in practice so automated back analyses using monitoring information are an important aspect in improving geotechnical engineering results Deltares 7 of 61 MSeep User Manual Deltares Systems makes use of Deltares s intensive engagement in R amp D for GeoBrain Geo Brain s objective is to combine experience expertise and numerical results into one forecast using Artificial Intelligence Neural Networks and Bayesian Belief Networks For more in formation about Deltares Systems geotechnical software including download options visit www deltaressystems com or choose the Deltares Systems Website option from the Help menu of MSEEP Rijkswaterstaat Rijkswaterstaat RWS is part of the Dutch Ministry for Traffic Public Works and Water Man agement RWS s tasks include the regulation construction management and maintenance of public works By supporting the development of MSEEP RWS is facilitating the uniform and reliable design of sheet pile walls For more information on RWS visit www minvenw nl On line software Citrix Besides purchased software Deltares Systems tools are available as an on line service The input can be created over the internet Heavy duty calculation servers at Deltares guarantee quick analysis while results are presented on line Users can view and print results as well as locally store project files Once connected clients are charged by the hour For mo
55. of 61 MSeep User Manual There are two possible calculations Steady state model phreatic aquifer Steady state model cross section adapted mesh MSeep simulates two dimensional stationary groundwater flow in a cross section of layered soil structures Steady state model phreatic aquifer model or in one phreatic aquifer com posed of different material areas Steady state model cross section adapted mesh model If the second model is used the option Enable erosion design can be marked to determine Piping and Heave The functioning of this option input output background is completely de scribed in a separate document Dijkontwerp tegen Sijperosie met MSeep Versie 7 in Dutch available on demand Project Properties On the Menu bar section 2 2 1 click Project and then choose Properties to open the input window The Project Properties window contains the following six tabs on which you can change different settings for the current project Project Properties Identification You use the Identification tab to specify the project identification data Titles Use Title 1 to give the calculation a unigue easily recognizable name Title 2 can be added to indicate specific characteristics of the calculation Both titles will be included on printed output Date The date entered here will be used on printouts and graphic plots for this project You can either use the current date on each printout or en
56. omatic regeneration of geometry on off When selected the program will automatically try to generate a new valid geometry whenever geometry modifications require this During generation poly lines solid blue are converted to boundaries solid black with interjacent layers New layers receive a default material type Existing layers keep the materials that were assigned to them Invalid geometry parts are converted to construction elements Automatic regeneration may slow down progress during input of complex geometry because validity will be checked continuously Undo Click this button to undo the last change s made to the geometry Deltares 43 of 61 MSeep User Manual Redo Click this button to redo the previous Undo action Delete X Click this button to delete a selected element Note that this button is only available when an element is selected See section 7 5 2 for more information on how using this button 7 3 3 Legend At the right side of the View Inout window Figure 7 2 the legend belonging to the geometry is shown This legend is present only if the Legend check box in the View Input tab of the Project Properties window is activated see section 4 1 2 J View Input io Geometry Input Boundary Conditions Erosion Mesh Edit A Formen le AAA Layers h E 4 cuy gt MW D 2 cay m e MU 2 sand gt amp O 1 gravei PE E Tool La
57. ow O print active window Print the current contents of the Outline View window 3 2 Tools menu 3 2 1 On the Menubar click Tools and then choose Options to open the corresponding input window In this window you can optionally define your own preferences for some of the program s default values Tools View Toolbar 8 Statusbar Indicate whether the toolbar and or status bar must be displayed each time you start MSeep Deltares 15 of 61 MSeep User Manual 3 2 2 Tools General Startup with Click one of these toggle buttons to determine whether or not a project should be opened or initiated when you start MSeep No project Each time you start MSeep you must use the buttons in the toolbar or the options in the File menu to open an existing project or start a new one Last used project Each time you start MSeep the last project you worked on is opened automatically New project When you start MSeep a dialog is displayed allowing you to enter data for a new project Use Enter key to The toggle buttons allow you to determine the way the Enter key is used in MSeep either as an equivalent of pressing the default button Windows style or to shift the focus to the next item in a window for users accustomed to the DOS version s of the program Save on calculation The toggle buttons determine how input data is saved prior to cal culation You can either save the input data automatically using the same file na
58. rations of poly lines e Example of invalid point not connected to the left limit Selection accuracy as area around cursor 1 ee L Selection accuracy as area around cursor ss ss L Example of deletion of a point ke Example of deletion of a geometry point k Example of deletion of a line e Pop up menu for right hand mouse menu Select mode Layer window Property editor of a layer Point window Property editor of a point e Boundary window Property editor of a polyline Boundary window Property editor of a line Example of dragging of a point ke vii MSeep User Manual viii Deltares List of Tables List of Tables 4 2 Predefined materials in D Settlement 25 Deltares ix MSeep User Manual x Deltares 1 1 1 2 1 2 1 1 2 2 1 2 2 1 1 2 2 2 General Information Preface The program MSeep analyses two dimensional stationary groundwater flow for a cross sec tion in layered soil structures or for phreatic aguifers The Finite Element Method is used to solve the differential eguation of Laplace which repre sents the stationary groundwater flow A built in mesh generator creates an element mesh for the geometry MSeep was developed especially for the geotechnical engineer MSeep s graphical interactive interface reguires just a short training period for novice users
59. re information please contact the Deltares Sales team sales deltaressystems nl 8 of 61 Deltares 2 Getting Started This Getting Started chapter aims to familiarize the user with the structure and user interface of MSEEP 2 1 Starting MSeep To start MSeep click Start on the Windows taskbar or double click a MSeep input file that was generated during a previous session When you start MSeep from the Windows taskbar the last project you worked on will open automatically MSeep will display the main window section 2 2 2 2 Main window When you start MSeep the main window is displayed This window contains a menu bar section 2 2 1 an icon bar section 2 2 2 and an Input View window section 2 2 3 that shows the pre selected or the most recently accessed project The first time after installation of MSeep the Input View window will be closed 2 2 1 The menu bar To access the MSeep menus click the names on the Menubar The menus contain the following functions File Standard Windows options for opening saving and sending files as well as several MSeep options for exporting and printing the active window section 3 1 Project Definition of the calculation type Model options for Project Properties and View Input File section 4 1 Soil Definition of soil type properties section 4 2 Geometry Definition of layers soil types and piezometric lines section 4 3 Geo objects Definition of the Discharges Potential
60. res Graphical Geometry Input 7 5 4 Dragging elements One way to modify elements is to drag them to other locations To drag an element first select it Once the element has been selected it is possible to drag it by pressing and holding down the left hand mouse button while relocating the mouse cursor Dragging of geometry elements can result in automatic regeneration of geometry if this option is switched on section 7 4 4 as shown in the example of Figure 7 23 when the selected point is moved upwards a new geometry will be created MSEEP creates new layers according to this new geometry Before After ccc Figure 7 23 Example of dragging of a point Deltares 53 of 61 MSeep User Manual 54 of 61 Deltares 8 Examples 8 1 The following examples are discussed below cross section example section 8 1 phreatic aquifer example section 8 2 For these examples the following is presented output file including an echo of the input and the calculation results o adrawing representing geometry and the boundary conditions o adrawing giving the element mesh and the deformed mesh o adrawing giving the iso potential lines Example 1 Cross example In example 1 the cross section method is used to calculate the phreatic surface of a homo geneous soil layer An internal point with a fixed potential has been defined on the bottom layer with coordinates 50 0 Input View 00058 uopejnojeo UON
61. s Layer Properties Delete Al Loos Delete All Loos e Points Figure 7 18 Pop up menu for right hand mouse menu Select mode Properties When this option is clicked the property editor for the selected object is displayed This procedure is performed by first selecting an object by clicking on it with the left hand mouse button Then clicking the right hand mouse button anywhere in the graphic window will display the pop up menu It is possible to use the property editor to guickly adapt the values properties of the selected object Each type of element reguires its own properties and therefore its own property editor as shown from Figure 7 20 to Figure 7 22 below Delete This option deletes the element that has been selected see the com ments for the Delete button in section 7 5 2 Undo This option will undo the last change s made to the geometry Redo This option will redo the previous Undo action View This option opens the Properties dialog in the Project menu as dis Preferences played in Statistics It is possible to use this option to view a window displaying all the vital statistics of the input data Note that in the window construction lines are called free lines Layer This option is a special feature that edits the material properties of lay Properties ers It is possible to click anywhere in a layer and directly choose this option to edit its properties Figure 7 19 Clicking outside the geometry layer
62. s and Sheet Piles section 4 4 Water Options for input of water unit weight of water section 4 5 Calculation Starts the calculation chapter 5 Results Graphical or tabular output of the calculation results chapter 6 Tools Options for editing MSeep program defaults section 3 2 Window Default Windows options for arranging the MSeep windows and choos ing the active window Help Online Help section 3 3 2 2 2 The icon bar You can use the buttons on the icon bar to quickly access frequently used functions Click on the following buttons to activate the corresponding functions Deltares 9 of 61 MSeep User Manual J Start a new MSeep project Open the input file of an existing project Save the input file of the current project Print the contents of the active window eI Gh O W Display a print preview Open the Project Properties window Here you can enter the project title and other identification data and determine the View Layout and Graph Settings for your project ET Start Calculation y Display the contents of online Help 2 2 3 Input View The Input View window displays the geometry and additional MSeep input of the current project The panel at the left side of the view contains buttons related to input data and buttons to con trol the graphical view Click on the following buttons to activate the corresponding functions Select mo
63. s the Save As Plaxis DOS dialog that enables to choose a directory and a filename in which to save the current geometry The file will be saved using the old DOS style geometry format for the Deltares Systems Geo programs Files in this format can be used by the finite element program Plaxis and in old DOS based versions of Deltares Systems Geo programs such as D GEO STABILITY DOS and MZet DOS Saving files of this type will only succeed however if the stringent demands imposed by the old DOS style are satisfied number of layers lt 20 number of PL lines lt 20 number of lines per boundary lt 50 Deltares 27 of 61 4 3 7 4 3 8 MSeep User Manual total number of points lt 500 To be able to differentiate between an old DOS style file and a normal geometry file the file dialog that prompts for a new file name for the old DOS style geometry file provides a default file name prefixing the current name with a D Geometry Limits Use this option to edit the geometry limits Geometry Limits 5 Geometry Limits Boundary limit at left m 0 000 Boundary limit at right m 75 000 Cancel Help Figure 4 8 Geometry Limits window A limit is a vertical boundary defining the end at either the left or right side of the geometry It is defined by an X co ordinate only Note A limit is the only type of element that cannot be deleted The values entered here are ignored
64. s will display the menu with the Layer Properties option disabled as there is no layer for which properties can be displayed Delete All Loose This option will delete all loose lines Loose lines are actually construc Lines tion lines that are not part of the boundaries or PL lines therefore all lines displayed as solid blue lines With this option it is possible to quickly erase all the leftover bits of loose lines that may remain after converting lines to a geometry Delete All Loose This option will delete all loose points Points Deltares 51 of 61 MSeep User Manual Material type Information on current material ype Unit weight dry kN m 14 00 Unit weight wet kN m 14 00 omen Figure 7 19 Layer window Property editor of a layer K A X co ordinate m 5500 Z co ordinate m 1100 Y co ordinate m po coca Figure 7 20 Point window Property editor of a point D Boundary 3 El Figure 7 21 Boundary window Property editor of a polyline Boundary Line 1 E Point 5 Xx co ordinate m 6 362 Z co ordinate m fa 053 Point 6 X co ordinate m ja 400 Z co ordinate m fo 716 Length m 25 040 Slope 2 fi 0 Figure 7 22 Boundary window Property editor of a line Note In the Boundary properties window only the point s number can be modified not the X and Z co ordinates 52 of 61 Delta
65. s window using the OK button When this button is clicked a validity check is performed on the geometry Any errors encountered during this check are displayed in a separate window These errors must be corrected before you can close this window using the OK button Of course it is always possible to close the window using the Cancel button but this will discard all changes Geometry Layers This option enables to add or edit layers to be used in the geometry A layer is defined by its boundaries and its material Use the Boundaries seen here in Figure 4 11 to define the boundaries for all layers by choosing the points that identify each boundary ja Layers Es Boundaries Materials Boundaries Points Huma 1 Se et X Coor Y Coor i Ae MT m 0000 000 4 2 2 3 000 0 000 zx 3 13 9 833 1 000 4 14 10 667 1 000 5 15 11 500 0 000 6 16 14 500 0 000 7 17 22 500 2 500 8 18 26 500 2 500 M E 19 34 500 5 000 10 20 40 500 5 000 11 21 53 000 0 000 12 22 56 000 0 000 113 23 56 833 1 000 1 24 57 667 1 000 150 25 58 500 0 000 16 26 75 000 0 000 Add Insert Ed Delete coca He Figure 4 11 Layers window Boundaries tab On the left hand side of the window it is possible to add insert delete or select a boundary In the table on the right it is possible to modify or add the points that identify the selected boundary Note Itis only possible to manipulate the
66. simple groundwater flow problems MSeep is built such that both freguent and infreguent users are able to use the program One condition will always remain however users have to be familiar with the calculation methods to be able to judge whether the program is suitable 20f61 Deltares 1 4 1 4 0 3 1 General Information for the problem at hand Furthermore they should always check the results with their own common sense Limitations There are limitations to the size of some parameters of MSeep On the one hand some of the limitations are made to protect the user from creating too complex problems On the other hand these limitations are made due to the finite memory size of the computer Geometry maximum numbers of geometry nodes 15 000 maximum number of soil layers i 99 maximum number of geometry points on each layer boundary i 99 maximum number of soil types 1000 maximum number of sheet piles i 20 maximum number of vertical boundaries s 20 Element mesh maximum number of nodes i no limit maximum number of elements i no limit maximum number of nodes on the phreatic surface i 350 number of nodes per element i 3 maximum size of the system matrix i 600 000 maximum number of boundary nodes 200 Boundary conditions maximum number of points with a constant discharge i 100 maximum number of points with a prescribed potential 100 minimal discharge for a seepage node 10715 minimal discharge to print into the output
67. sivity of all elements the geometry will be drawn on the screen When the required accuracy is reached the results are written to the output file and the dump file The maximum error indicates the average of the difference between the elevation head of all nodes in two successive iteration steps The phreatic surface or the elevation head per element can never be less than 0 01 meter The area drops dry locally Note With the function key lt ESC gt a calculation can be aborted The process will finish the current iteration or adjustment step The results will not be available when a calculation is aborted The output file is created each time the Start option in the Calculation menu is selected Viewing the file can be done by selecting the Report option in the Results menu With the keys shown in the bottom line on the screen the user can page through the file First of all the input data of the problems is written on the file as it is interpreted by MSeep Secondly the results per nodal point are written on the file node number with x and y coordinate the potential in the node the discharge m s which flows through the nodal point For internal nodes or nodes on a closed boundary or phreatic surface without rainfall this discharge has to be zero type of node if node lies on boundary For each part of the outside border of the geometry the total discharge is calculated except for the vertex points This outl
68. ted because they intersect The line construction runs from boundary to boundary Configuration 3 is illegal as there is no connection with the left boundary Add point s to boundary PL line Use this button to add extra points to lines lines polylines boundary lines By adding a point to a line the existing line is split into two new lines This provides more freedom when modifying the geometry Note When the Add point s to boundary PL line button is clicked each left hand mouse click adds a new point to the nearest line until one of the other tool buttons is selected or click the right hand mouse button or press the Escape key Generate layers Use the Automatic regeneration of geometry on off button amp to start or stop the automatic conversion of construction elements to actual boundaries and layers Valid poly lines are converted to boundaries which are displayed as black lines Invalid lines remain blue Layers are generated between valid boundaries and default soil types are assigned It is possible to modify the soil type assigned to a layer by first selecting the layer and then clicking the right hand mouse button and choosing the Layer Properties option in the pop up menu to display the Layer window see Figure 7 19 in section 7 5 3 Once a material has been assigned to a layer this material will continue to be associated to that layer in subsequent conversions of construction elements as long as the lay
69. ter a specific date Drawn by Enter the name of the user performing the calculation or generating the print out Project ID Enter your project identification number Annex ID Specify the annex number of the printout Mark the checkbox Save as default if you want to use the current settings every time you start MSeep Project Properties Input View You use the Input View tab to select the visible data in the main window and the Input View window section 2 2 3 Display Title panel Mark this checkbox to display the title panel with the project titles at the bottom of the Outline View window Info bar Mark this checkbox to display the information bar at the bottom of the Outline View window Sample scale for Mark this checkbox to use the same scale for x and y axis x and y axis Layer Colors Mark this checkbox to display the layer colors Rulers Mark this checkbox to display the rulers Origin Mark this checkbox to display the origin Large cursor Mark this checkbox to use the large cursor instead of the small one 20 of 61 Deltares 4 2 4 2 1 Input Points Mark this checkbox to the display the points Discharges Mark this checkbox to display the discharges Potentials Mark this checkbox to display the potentials Sheet Piles Mark this checkbox to display the sheet piles Mesh Mark this checkbox to display the mesh Labels Points Mark this checkbox to display the point numbers discharge numbers potenti
70. tersect with the forbidden line You will use a forbidden line for example to model a sheet piling In the geometry sheet piles can be defined The X and Y coordinate of the top of the sheet pile is assigned to a point in the top boundary and the reguired length has to be specified These coordinates must appear in the point table of the geometry Only vertical sheet piles are possible A sheet pile may not be placed on the left or right side of the geometry A sheet pile may never cut the geometry into two parts and may never lie entirely outside the geometry If any error occurs the number of boundary nodes of the element mesh will be incorrect When returning to the input menu an ERROR MESSAGE with Number of boundary nodes Deltares 31 of 61 MSeep User Manual is incorrect will appear Sheet piles will be drawn in all plots with the exception of geometry plots 4 5 Water menu 4 5 1 Water properties You can change the unit weight and the viscosity of water here 32 of 61 Deltares Calculations On the menu bar section 2 2 1 click Calculation to display the Start Calculation window Calculation Start Potential calculation After the preparation of the input the calculation of the potential in the nodal points of the finite element mesh can be started Within MSeep different kinds of potential calculation can be distinguished Cross section Potential calculation without a phreatic surface Aft
71. the MSEEP software either from CD or by downloading from the Deltares Systems website via MS Inter net Explorer Operating systems o Windows 2003 O Windows Vista O Windows 7 32 bits O Windows 7 64 bits a Windows 8 Hardware specifications O 1 GHz Intel Pentium processor or equivalent 512 MB of RAM 400 MB free hard disk space SVGA video card 1024 x 768 pixels High colors 16 bits CD ROM drive Microsoft Internet Explorer version 6 0 or newer download from www microsoft com For use of the Feasibility module an Internet connection is needed ooadaaa 4 of 61 Deltares General Information 1 6 Definitions and Symbols 1 7 1 8 P Ow pore water pressure D medium grain size p potential or piezometric hydraulic head g acceleration of the gravity ky permeability in x direction ky permeability in y direction p water pressure q discharge per unit width in the aquifer Q prescribed discharge along the boundaries or internal sources p unit weight of the fluid Tz transmissivity in x and y direction v viscosity water Yy elevation head Getting Help From the Help menu choose the Manual option to open the User Manual of MSEEP in PDF format Here help on a specific topic can be found by entering a specific word in the Find field of the PDF reader Clicking on the Help button situated at the bottom right side of a window will open the User Manual Getting Support Deltares Systems tools are supported by De
72. the mesh at the bottom of the sheet pile o the element mesh will be split from the top of the sheet pile to this bottom If the user wants to have a sheet pile with the exact correct length then it is recommended to create a fictive layer boundary which passes through the bottom of the sheet pile o for internal nodes with a constant discharge or a prescribed potential MSeep searches for the nearest nodal point in the mesh if there are any internal nodes with a constant discharge or a fixed potential no stream line calculation can be performed boundaries or internal nodes with a fixed potential are treated with a penalty method in the system matrix This can cause a slight inaccuracy in the solution o internal nodes will always have an internal discharge equal to zero unless a well or pump is prescribed for this node This is also valid for a phreatic surface without rain when sufficient adjustments are performed o only if the iteration process is aborted there will be local water unbalance The user has to check if this local unbalance is small in comparison to the total in and outflow for an extra streamline calculation a water unbalance in the potential calculation causes an unbalance in the streamlines o application of MSeep is allowed as long as the two dimensional plane strain assumption is valid Minimum System Reguirements The following minimum system reguirements are needed in order to run and install
73. using this window will only be displayed in the underlying View Input window Geometry tab after this window is closed using the OK button When clicking this button a validity check is performed on the geometry If errors are encountered a dialog window asks if auto correction should be tried Remaining errors are reported and can be corrected manually The error correction is confirmed by clicking the OK button and discarded by clicking the Cancel button Geometry Check Geometry Select this option to verify the validity of the geometry All requirements are checked If the geometry complies with all the requirements a message will confirm this Information Sn O The geometry has been tested and is ok Figure 4 13 Information window on confirmation of a valid geometry 30 of 61 Deltares 4 4 4 4 1 4 4 2 4 4 3 Input If any errors are encountered during this check they are displayed in a separate window GeoObjects menu GeoObjects Discharges In certain points in the element mesh a constant discharge can be prescribed The user has to define the x and y coordinate and the discharge in m s Before the calculation starts the discharge will be applied to the nearest node Beforehand the user can look at the element mesh to find the coordinates of the desired node A positive discharge means injection a well a negative discharge means extraction pump GeoObjects Potentials Instead of a d
74. vate it in the regular View Input window or use the menu to select it JA View Input ela Geometry Input Boundary Conditions Erosion Mesh Edit A Ba ES EZ El 4 cay gt Y Sl 3 cay n 153 2 sano gt 8 3 1 gravel P El E 17 Tool 4 PD a L B a an LLLI Tinn m lt uuuu X 7 021 23 848 Edit Current object None Figure 7 1 View Input window Geometry tab When the Geometry tab in the View Input window is selected it displays a graphical repre sentation of only the geometrical data On the left of the window the Edit and Tools buttons are displayed section 7 3 2 On the right the legend belonging to the geometry is displayed section 7 3 3 At the bottom of the window the title panel and the info bar are displayed The title panel displays the project titles defined using the Properties option in the Project menu The info bar provides information from left to right about the current cursor position the current mode and the object currently selected The legend title panel and info bar are optional and can be controlled using the Properties option in the Project menu It is possible to use three different modes when working in the Geometry tab of the View Input window Select The Select mode is the default mode and enables the user to select existing elements in the window Add The Add mode allows the addition of elements using o
75. w using those buttons Add single line s land Add polyline s EI Each poly line is displayed as a solid blue line and each point as a small black rectangle Figure 7 10 Figure 7 10 Representation of a polyline The position of the different points of a poly line can be modified by dragging the points as explained in section 7 5 4 or by editing the poly line This is done by clicking the right hand mouse button after selecting the poly line and then choosing the Properties option in the pop up menu The underlying grid helps the user to add and edit poly lines Use the Properties option in the Project menu to adjust the grid distance and force the use of the grid by activating Snap to grid When this option is activated each point is automatically positioned at the nearest grid point The specified line pieces must form a continuous line along the full horizontal width of the model This does not mean that each line piece has to be connected exactly to its predecessor and or its successor Intersecting line pieces are also allowed as shown in the examples of Figure 7 11 Deltares 47 of 61 7 4 4 MSeep User Manual ml H a a ae Figure 7 11 Examples of configurations of poly lines Configuration 1 is allowed The different lines are connected and run from boundary to boundary o Configuration 2 is also allowed The different are connected They are defined as being connec
76. y pressing the Escape key This also stops adding poly lines al together A different way to end a poly line is to double click the left hand mouse button Then the poly line is extended automatically with an end line This end line runs horizon tally from the position of the double click to the limit of the geometry in the direction the last line of the poly line was added Therefore if the last line added was defined left to right the end line will stop at the right limit Note that by finishing adding a poly line this way it is possible to start adding the next poly line straight away Deltares Graphical Geometry Input Add PL line s Click this button to add a piezometric level line PL line Each PL line must start at the left limit and end at the right limit Furthermore each consecutive point must have a strictly increasing X co ordinate Therefore a PL line must be defined from left to right starting at the left limit and ending at the right limit To enforce this the program will always relocate the first point clicked left hand mouse button to the left limit by moving it horizontally to this limit If trying to define a point to the left of the previous point the rubber band icon indicates that this is not possible Subseguently clicking on the left side of the previous point the new point will be added at the end of the rubber band icon instead of the position clicked As with poly lines it is also possibl

MSeep User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents