E-20-M53 Center I : 10/24-6-R0172-0AO Cost share
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1. Shear Wave Velocity Correlation with Effective Stress Borehole 92 Layer 2 Vs Corr with Effective Stress G Gyax YS Cyclic Shear Strain To calculate G Gmax vs Cyclic Shear Strain Spatial LIQUFAC uses the curves developed by Vucetic and Dobry 1991 which use the plasticity index of the soil The plasticity index is input using the dialog box shown below A zero 0 can represent either that there is no data for this sample or that the acutal Pl was equal to zero The default plasiticity index is set to zero percent 0 25 Volumetric Compression The volumetric compression of the soil in a layer is calculated using the curves which define a relationship between the volumetric compression and the cyclic shear strain There are curves for three 3 different soil types The dialog box for selecting which soil type to base the relationship on is shown below 26 Percent Fines Spatial LIQUFAC calculates the liquefaction resistance of sand using the method developed by Seed et al 1984 which incorporates the percentage of fines in the sand The dialog box for entering the percent fines for the soil layer is shown below A zero 0 00 represents either 0 fines or no data is available for that sample Upon completion of the compilation of data for the layer Spatial LIQUFAC repeats the analysis for each layer in the borehole After each borehole is complete Spatial LIQUFAC informs the user of its progress before2. Spatial Analyst 1 0 extension module on your PC 2 Insert the Spatial LIQUFAC program disk in your 3 5 floppy disk drive 3 Copy the entire contents of the program disk directly into the root directory on your c drive see system requirements Following a successful installation the contents of the arcv_liq directory should appear as shown below f3 Exploring arcv_liq Getting Started Perform the following steps to start a new analysis using Spatial LIQUFAC Version 1 0 l Start up ArcView Version 3 0 2 From the ArcView File menu choose Open Project 3 Open the default project for Treasure Island The correct location and name of this project file should be c arcv_liq treasure default_tiapr If you cannot find this file check to be sure that the program files were installed properly see installation procedure for a PC Open Project 4 Spatial LIQUFAC will now start up and request for you to input a new project name This new project must be located in the c arcv_liq projects directory Use any file name you wish but do not attach a file extension to the file name Suve New Project As 5 Spatial LIQUFAC is now ready for use The above procedure must be followed every time you wish to create a new project for use with Spatial LIQUFAC CHAPTER 3 Spatial LIQUFAC Functions This chapter contains an introduction on performing an earthquake hazard a
3. General Project Informution set Spatial LIQUFAC then opens the appropriate windows and sets up the environment for selecting boreholes You are not restricted to simply selecting boreholes with the mouse All available methods for selecting records in ArcView may be utilized Once a set of boreholes is selected they must be analyzed before the active set is saved Adding New Boreholes Use this option to add one or more boreholes to the active set after the initial boreholes have been analyzed The procedure for selecting additional boreholes is identical to that of selecting a new set While using the map or table to select new boreholes the boreholes which are already part of the active set of analyzed boreholes will be highlighted in yellow Once additional boreholes have been selected the user must analyze these boreholes before they are saved and added to the active set of analyzed boreholes Removing Boreholes Use this option to remove one or more boreholes from the active set of analyzed boreholes Simply choose the Remove Boreholes option from the LIQUFAC menu and then select the boreholes from the list of boreholes in the active set The revised set is automatically saved To reinstate boreholes which have been removed you must use the Add Boreholes option The Remove Boreholes window is shown below i Remove Boreholes CHAPTER 5 Analyzing Boreholes This chapter explai
4. proceeding to the next borehole An example is shown below Progress Update i 27 Displaying the Minimum Number of Message Boxes If the user chooses to not display all of the input message boxes that are generated while analyzing a set of boreholes Spatial LIQUFAC makes some decisions regarding the information obtained from the geotechnical database for each borehole These assumptions are stated when the user selects No in the Message Box Display window Assumptions If you do not wish to make all of these assumptions you must view all of the message boxes Hint lf you wish to analyze a large number of boreholes and you only need to view the message boxes for a few of the boreholes do the following First select a new borehole set consisting of the boreholes that you do not need to view all of the message boxes Analyze these boreholes Next add the boreholes for which you would like to view all of the message boxes and then analyze them The active set of boreholes will now consist of both sets of boreholes 28 CHAPTER 6 Calculating Settlement This chapter explains the how to calculate the liquefaction potential and post liquefaction vertical settlement and create an output point shapefile of the settlement at each borehole e Defining the Earthquake Characteristics 30 e Running Spatial LIQUFAC to Create the Settlement Shapefile 30 e Viewing the Spatial LIQUFAC Output Files 30 29 De
5. rep is ACO Y N N N A supplemental sheet GIT X MODIFICATION NO P00001 DELETES CA8120 Georgia Institute of Technology Page 1 Office of Contract Administration 02 OCT 1997 14 39 PROJECT CLOSEOUT NOTICE n NJ NN Closeout Notice Date 02 OCT 1997 project Number E 20 M53 Doch Id 40216 Center Number 10 24 6 R0172 0A0 6 aneor Director FROST JAMES Project Unit CIVIL ENGR Sponsor NAVY NAVAL FACILITIES ENG COMM PA Division Id 3335 Contract Number N47408 96 M 8397 Contract Entity GTRC Prime Contract Number Title LIQUEFACTION POTENTIAL MAPPING USING A SPATIAL amp ANALYSIS SYSTEM Effective Completion Date 30 SEP 1997 Performance 30 SEP 1997 Reports Closeout Action Y N Date Submitted Final Invoice or Copy of Final Invoice Y Final Report of Inventions and or Subcontracts N Government Property Inventory and Related Certificate N Classified Material Certificate N Release and Assignment N Other N Comments Distribution Required Project Director Principal Investigator Y Research Administrative Network Y Accounting Y Research Security Department N Reports Coordinator YX Research Property Team Y Supply Services Department Y Georgia Tech Research Corporation Y Project File Y E 20 M53 EARTHQUAKE HAZARD ASSESSMENT USER MANUAL Prepared by Daniel P Carroll Georgia Institute of Technology Dr J David Frost Georgia Institute of Technology Dr Ronald
6. 15 57 43 Project E 20 M53 Center 10 24 6 R0172 0A0 Contract N47408 96 M 8397 Prime Subprojects N Main project Project unit CIVIL ENGR Project director s FROST J D CIVIL ENGR Sponsor division names NAVY Sponsor division codes 103 Award period 960930 to 970930 Sponsor amount Contract value Funded Cost sharing amount New this change 24 975 00 24 975 00 Does subcontracting plan apply N Title OCA PAD INITIATION PROJECT HEADER INFORMATION Cost share Center shr 11 07 96 Active Rev 0 OCA file Work type RES Mod Document PO Contract entity GTRC CFDA PE Unit code 02 010 116 NAVAL FACILITIES ENG COMM PA 7 046 performance 970930 reports Total to date 24 975 00 24 975 00 0 00 LIQUEFACTION POTENTIAL MAPPING USING A SPATIAL amp ANALYSIS SYSTEM PROJECT ADMINISTRATION DATA OCA contact Jacquelyn L Bendall Sponsor technical contact CHRISTINE TABORELLI 805 982 5058 NAVFAC CONTRACTS OFFICE BLDG 41 CODE 2713 NCBC 1000 23RD AVE PORT HUENEME CA 93043 4301 Security class U C S TS U Defense priority rating Equipment title vests with N A Sponsor Administrative comments INITIATION OF FIXED PRICE PURCHASE ORDER DEFAULT CLAUSE 894 4820 Sponsor issuing office CHRISTINE TABORELLI 805 982 5058 NAVFAC CONTRACTS OFFICE BLDG 41 CODE 2713 NCBC 1000 23RD AVE PORT HUENEME CA 93043 4301 ONR resident
7. atial LIQUFAC do not have the ability to deal with this condition so off shore borings cannot be used in an analysis The Active Set of Analyzed Boreholes The active set of boreholes is made up of boreholes which have been previously selected and analyzed A borehole is not added to the active set until it has been selected and analyzed The active set of analyzed boreholes in memory is displayed upon opening a project Hint The user can also view the active set of boreholes by choosing Add Boreholes or Remove Boreholes from the LIQUFAC menu and then exit by pressing Cancel f Analyzed Boreholes in Memory The user can change the active set of analyzed boreholes by choosing the Select New Borehole Set Add Boreholes or Remove Boreholes options from the LIQUFAC Menu Selecting a New Set of Boreholes To select a new set of boreholes and restart an analysis simply select the Select New Borehole Set option from the LIQUFAC menu This will erase the active borehole set from memory and set up a new analysis Once this command is confirmed the previous boreholes list is lost permanently First Spatial LIQUFAC will prompt the user to enter general information regarding the project This information is stored in the header of the Spatial LIQUFAC input and output files so that previous projects can easily be recognized The general information input box is shown below
8. e next layer The user may be required to confirm or enter the unit weight for the layer not requiring analysis The unit weight is required to calculate the overburden stress At this point Spatial LIQUFAC also checks to see if there are valid SPT N Values available for the layer at this borehole The N Values are an essential part of the liquefaction calculations and analysis cannot be performed without them If there are no N Values available no analysis is performed for this layer and the program proceeds to the next layer USCS Next the user is prompted to select a representative Unified Soil Classification System symbol for the soil layer at the borehole The dialog is shown below Borehole 92 Layer 2 USCS Ba The USCS symbol is merely used for display purposes in the Spatial LIQUFAC output file The value entered here has no effect on the analysis It may be left blank or set to NA for not available 20 Unit Weight The dialog for entering the soil unit weight for a layer is shown below TElev ft Unit Weight pcf ab ii mini ibn inin dnin db db Sadeh ini ai inii nda Gab dnd ain Sadi Dni inini Bin a i inh aba aii ini in ia h Borehole 92 Layer 2 Unit Weight This value is the wet unit weight of the soil The default value is set to the average of the non zero values for the unit weight in the database If there is no value available for the unit weight in the database the user is asked to ass
9. elp 34 CHAPTER 8 Sample Run This chapter shows the input and output of an sample run that was performed for Treasure Island using Spatial LIQUFAC e Description of Analysis e Borehole Selection e Borehole Analysis e Results 36 36 37 38 35 Description of Analysis The following describes an analysis of the earthquake induced post liquefaction vertical settlement at Treasure Island Naval Facility for a earthquake with a magnitude of 7 0 and a peak ground acceleration of 0 16 g s The analysis will include all of the above water level boreholes Borehole Selection First the appropriate boreholes must be selected To accomplish this a query was used to select all of the boreholes with elevations greater than the ground water elevations The query builder available in the ArcView Table menu used is shown below 2 Attributes of SPT m The resulting selection is 130 of 48 available boreholes The selected boreholes are shown on the map on the next page 36 Treasure blund i Borehole Analysis Analysis was performed on the active set of Treasure Island boreholes using the following assumptions e The Old Bay Mud layer was not analyzed since it is not likely to liquefy e The dynamic shear properties of the soil were specified by a shear wave velocity equal to 511 ft sec for the hydraulic fill and 603 ft sec for the Young Bay Mud e The curve used for the Volumetric Comp
10. fining the Earthquake Characteristics The Caclulate Settlement option under the LIQUFAC menu allows the user to input the earthquake magnitude and peak ground acceleration and then Spatial LIQUFAC calculates the vertical settlement at each borehole for the input earthquake scenario and stores the results in a point shapefile Enter Earthquake Characteristics Running Spatial LIQUFAC to Create the Settlement Shapefile After the earthquake information is input and Spatial LIQUFAC has been run the user is asked to input a filename for the output settlement shapefile This file can be stored anywhere however it is recommended that all output shapefiles be stored in their respective projects folder This process may be repeated for several different earthquake scenarios Viewing the Spatial LIQUFAC Output Files To view the output from Spatial LIQUFAC for a particular borehole select the View LIQUFAC Output option from the LIQUFAC menu Then select the borehole you would like to view View LIQUFAC Output 30 Spatial LIQUFAC opens the output file for the selected borehole using the Windows 95 Notepad The output file may be printed by selecting the Print option from the Notepad File menu To return to ArcView close the Windows 95 Notepad It is not necessary to save the file An example of viewing the output file using Windows 95 Notepad 31 CHAPTER 7 Creating Contou
11. hole Selection A set of SPT boreholes must be created for the site of interest These can be selected from the Treasure Island Geotechnical Database by either using the map the table or combination of the map and the table Any query procedure available to the user in ArcView ie table query or spatial overlay can be used to select the boreholes e Borehole Analysis Once a set of boreholes has been selected the user must perform a compilation of the geotechnical engineering soil properties This can be a lengthy process since it can involve examining all of the available data for each borehole to select the appropriate information for the analysis The borehole analysis produces the required Spatial LIQUFAC input files After a set of boreholes has been analyzed the user may add or remove boreholes from this set if desired e Settlement Calculation Next the user enters the chosen earthquake magnitude and peak ground acceleration and the Spatial LIQUFAC program is run to estimate the vertical settlement at each borehole This step involves the creation of an output point shapefile containing the vertical settlement at each borehole from the Spatial LIQUFAC output files This step may be repeated as many times as necessary to evaluate many different earthquake scenarios e Interpolation and Contouring Finally the output point shapefiles from the settlement calculation are used to create contour shapefiles depicting the earthq
12. holes to create the input files Allows user to enter the earthquake characteristics calculate the settlement for the analyzed boreholes and create n output point shapefile of the settlement at each borehole Allows the user to view and print the output files created by Spatial LIQUFAC by opening the files in Windows 95 notepad Creates contour shapefile of the settlement from the point shapefile CHAPTER 4 Selecting Boreholes This chapter explains how to select a new set or change the active set of boreholes to be included in the analysis e About the Treasure Island Geotechnical Database e The Active Set of Analyzed Boreholes e Selecting a New Set of Boreholes e Adding New Boreholes to the Active Set of Analyzed Boreholes e Removing Boreholes from the Active Set of Analyzed Boreholes About the Treasure Island Geotechnical Database The Treasure Island Geotechnical Engineering Database was originally compiled by Geomatrix Consultants and subsequently modified by The Georgia Institute of Technology The database used in Spatial LIQUFAC Version 1 0 consists of 148 Standard Penetration Test SPT boreholes These SPT boreholes were deemed the boreholes most suitable for geotechnical analysis Of these 148 SPT boreholes 8 are off shore boreholes The elevation of the top of the borehole is below the elevation of the water table The analysis routines integrated in Sp
13. irements Spatial LIQUFAC Version 1 0 is optimally designed to run on IBM PC s and compatibles with a Pentium processor using the Windows 95 operating system The program files require about mb of hard disk space on the c drive At least 3mb of hard disk space is recommended to accommodate all of the project files that will be created while using Spatial LIQUFAC It is recommended that the system also have at the minimum 6mb of memory 32mb of memory is preferred Important The Spatial LIQUFAC program files must be installed into the root directory on the c drive Spatial LIQUFAC will not run if these files are installed anywhere else on the computer The screen resolution must be set to 1024 x 768 pixels in order for Spatial LIQUFAC to run optimally ArcView Version 3 0 Spatial LIQUFAC is designed to run from within the ArcView Version 3 0 GIS environment It will not run in conjunction with any other GIS package ArcView Version 3 0 for Windows 95 must be installed on the PC The ArcView Extension Module Spatial Analyst 0 is required for Spatial LIQUFAC to be able to create contours of the predicted ground settlements All other features of Spatial LIQUFAC will run without the Spatial Analyst installed Installation Procedure for a Personal Computer Perform the following steps to install Spatial LIQUFAC Version 0 on your PC Install ArcView Version 3 0 GIS software and the
14. layers the user would specify four 4 layers and enter the appropriate elevations Since Spatial LIQUFAC Version 1 0 has been designed to run specifically for Treasure Island the defaults for stratigraphy have been set to those for Treasure Island First the user must select the total number of layers Number of Layers at Borehole 92 The Treasure Island default is three 3 layers Hydraulic Fill Young Bay Mud and Old Bay Mud Spatial LIQUFAC will allow for up to five 5 layers Next the user must enter the elevation at the top of each layer for this borehole Luyer Elevations at Borehole 92 pa ee OO RE To confirm the default selections press OK The elevations are relative to the San Francisco Bay Mean Low Low Water mllw Layer Analysis Next Spatial LIQUFAC compiles the data for each layer based on the stratigraphy for the borehole First the user must decide if liquefaction and settlement analysis is to be performed for this layer at this borehole Borehole 92 Layer 2 Analysis 9 e Analysis Required If Yes is selected Spatial LIQUFAC proceeds and performs the tasks for layer analysis outlined in this chapter No Analysis Required f analysis is not required for a layer liquefaction potential and post liquefaction settlement will not be calculated for this layer at this particular borehole All of the following user inputs will be skipped and the analysis will proceed to th
15. nalysis using Spatial LIQUFAC The basic operating procedure is discussed and a brief description is given on each of the functions e Performing an Earthquake Hazard Analysis using Spatial LIQUFAC 8 e The Spatial LIQUFAC Process 8 e The Spatial LIQUFAC Menu lI Performing an Earthquake Hazard Analysis using Spatial LIQUFAC Before performing an earthquake hazard analysis using Spatial LIQUFAC the user should have a comprehensive knowledge of geotechnical and seismic characteristics of the site to be analyzed in this case Treasure Island This should include at the minimum familiarity with the geotechnical database understanding the Treasure Island construction history and stratigraphy experience with the Standard Penetration Test SPT procedure understanding the dynamic response of soils found on the site and knowledge of the regional seismicity This program calculates an estimate of the vertical deformation that is likely to occur under a specific earthquake scenario The inputs specified by the user throughout an analysis have a direct impact on the results generated by this program The user is responsible for entering the appropriate information required for each analysis The Spatial LIQUFAC Process The Spatial LIQUFAC process for generating an output shapefile of vertical settlement contours for a given earthquake scenario includes four basic steps A graphical representation of this process is shown on page 10 e Bore
16. ns the details of the compilation of the geotechnical engineering soil properties e Message Box Display 17 e Borehole Stratigraphy Input 18 e Layer Analyses 19 o Analysis Required 19 o No Analysis Required 19 USCS 20 0 Unit Weight 2l SPT N Values 22 0 Dynamic Soil Properties 24 0 G Guax vs Cyclic Shear Strain 25 Volumetric Compression 26 o Percent Fines 27 e Displaying the Minimum Number of Message Boxes 28 Message Box Display After the user has confirmed the selection of new borings to be analyzed there are two possible methods for compiling the geotechnical engineering soil properties for the boreholes The user may choose to view all of the input boxes required to compile the geotechnical data input or they may choose to bypass the majority of input boxes and view the minimum amount of boxes Message Box Display For inexperienced users it is recommended that all of the boxes are viewed If No is selected and most of the boxes are bypassed refer to the section on Displaying the Minimum Amount of Message Boxes located at the end of this chapter Borehole Stratigraphy Input Spatial LIQUFAC reads the available data on stratigraphy from the geotechnical database and then displays it for the user to confirm The user may choose to input different values than what is read from the database For example if there are four 4 layer actually present at a specific location where the database indicates three 3
17. o Luna Tulane University TABLE OF CONTENTS CHAPTER Introduction What is Spatial LIQUFAC How does Spatial LIQUFAC work About Spatial LIQUFAC Version 1 0 CHAPTER 2 Installation System Requirements ArcView 3 0 Requirements Installation Procedure for a Personal Computer CHAPTER 3 Spatial LIQUFAC Functions Performing an Earthquake Hazard Analysis using Spatial LIQUFAC The Spatial LIQUFAC Process The Spatial LIQUFAC Menu CHAPTER 4 Selecting Boreholes About the Treasure Island Geotechnical Database The Active Set of Analyzed Boreholes Selecting a New Set of Boreholes Adding New Boreholes to the Active Set of Analyzed Boreholes Removing Boreholes from the Active Set of Analyzed Boreholes CHAPTER 5 Analyzing Boreholes Message Box Display Borehole Stratigraphy Input Layer Analyses Analysis Required No Analysis Required USCS Unit Weight SPT N Values Dynamic Soil Properties G Gpax Ys Cyclic Shear Strain Volumetric Compression Percent Fines Displaying the Minimum Number of Message Boxes NNN gt gt a Ww continued CHAPTER 6 Calculating Settelment Defining the Earthquake Characteristics Running Spatial LIQUFAC to Create the Settlement Shapefile Viewing the Spatial LIQUFAC Output Files CHAPTER 7 Creating Contours Creating Contours of the Vertical Settlement CHAPTER 8 Sample Run Description of Analysis Borehole Selection Borehole Analysis Results APPENDIX A Database Legend APPENDIX B Reference
18. ression vs Cyclic Shear Strain was selected based on the best available USCS classification for the layer If no USCS classification was available the SP curve was used e The unit weight was set to 120 pcf if no data was available 37 Results The resulting settlement contours for M 7 0 and a 0 16 g s are shown below bsp i a v 5 a 3 3 cs 38 APPENDIX A Database Legend Below are two tables which describe some of the symbols and abbreviations used in the geotecnical database AUG RT WS WS BR Consultant Name PAL Consultants Woodward Clyde Consultants Harding Lawson Associates Rutherford amp Chekene McCreary Koretsky Engineers GEO Engineering Consultants Tejima and Associates Geo Resource Consultants Associated Geotechnical Engineers Terratech Inc l Taber Consultants Harlan Miller Tait Consultants Geomatrix Inc Auger Rotary Wash Wash Boring 39 APPENDIX B References Vucetic M and Dobry R 1991 Effect of Soil Plasticity on Cyclic Response Journal of Geotechnical Engineering Vol 117 No I Seed H B Tokimatsu K Harder L F and Chung R M 1984 The Influence of SPT Procedures in Soil Liquefaction Resistance Evaluation Report No UBC EERC 84 15 Earthquake Engineering Research Center University of California Berkeley CA
19. rs This chapter explains the how to create a contour shapefile of the vertical settlement from the point shapefile generated by Spatial LIQUFAC e Creating Contours of the Vertical Settlement a3 32 Creating Contours of the Vertical Settlement To draw contours of the post liquefaction induced vertical settlement select the Create Contours option from the LIQUFAC pull down menu You will then be prompted to select the name of the point shapefile to create the contours from This is one of the output point shapefiles that Spatial LIQUFAC created while calculating the settlement There should be a different output shapefile for each earthquake scenario that you ran Select one of these shapefiles and press OK Next the Contours dialog box will be displayed showing several different options available for creating contours l Surface Grid Specification Set the Output Grid Extent to Same As lt the name of the settlement shapefile gt and then press OK ArcView then displays the next dialog box Interpolate Surface 33 Choose which method you wish to use to interpolate the surface Inverse Distance Weighted or Spline and select settle_in as the Z Value Field You are then asked to specify the contour interval and the base contour Contour Parameters Treasure Island iets For more details on creating contours with ArcView please refer to the ArcView On Line h
20. s CHAPTER I Introduction This chapter includes an overview of the Spatial LIQUFAC program a brief description of how Spatial LIQUFAC works and what features are available in Version 1 0 e What is Spatial LIQUFAC e How does Spatial LIQUFAC work e About Spatial LIQUFAC Version 1 0 What is Spatial LIQUFAC Spatial LIQUFAC is an earthquake hazard analysis system which was developed by The Georgia Institute of Technology and Tulane University for the U S Naval Facilities Engineering Command The system operates from within the Geographic Information System GIS software ArcView 3 0 by ESRI and can predict the earthquake induced post liquefaction vertical settlement over a site specific area using information contained in borehole logs that include Standard Penetration Tests SPT How does Spatial LIQUFAC Work The program LIQUFAC Version 2 00 which performs liquefaction potential analysis under earthquake loading and calculates the vertical settlement at a specific borehole was developed for the U S Naval Facilities Engineering Command by Information Dynamics Inc and Prototype Engineering Inc in January 1994 Spatial LIQUFAC is an enhanced version of LIQUFAC 2 00 which can be run from within the ArcView 3 0 GIS environment Spatial LIQUFAC is an environment where the user can easily query the spatial database of SPT boreholes and geotechnical engineering information for a specific site and prepare appropriate inpu
21. t files for each borehole These files are then processed through Spatial LIQUFAC to predict the vertical settlement that will occur at each borehole location under a specific earthquake scenario These results are then read back into the GIS environment and a spatial database of the settlement information is created Through Spatial LIQUFAC the user has the full capabilities of ArcView 3 0 which include the creation of settlement contours and the ability to perform spatial overlays and analysis of the compiled settlement output data About Spatial LIQUFAC Version 1 0 Spatial LIQUFAC Version 1 0 has been designed and implemented as a site specific engineering program Subsequent versions will include modifications so that the program is site independent The program has been designed to run only for the U S Naval Facility at Treasure Island California The software incorporates the use of the Treasure Island Geotechnical Engineering Database developed by The Georgia Institute of Technology using data originally compiled by Geomatrix Consultants CHAPTER 2 Installation This chapter includes a list of the system hardware and software required to run Spatial LIQUFAC the installation procedure for a personal computer and a brief description of how to get started using the Spatial LIQUFAC software e System Requirements 4 e ArcView 3 0 Requirements 4 e Installation Procedure for a Personal Computer 4 e Getting Started 5 System Requ
22. uake induced post liquefaction vertical ground settlements for each earthquake scenario Detailed descriptions of the procedures for selecting boreholes analyzing boreholes calculating settlement and creating contours with Spatial LIQUFAC are provided in Chapters 4 5 6 and 7 respectively The user may run the settlement calculation and contouring routines repeatedly in order to asses many different earthquake scenarios with the same set of boreholes t ArcView shapefiles are a simple non topological format for storing the geometric location and attribute information of geographic features The shapefile format defines the geometry and attributes of geographically referenced features in as many as five files with specific file extensions The Spatial LIQUFAC Process 10 The Spatial LIQUFAC Menu Below is an illustration all of the functions available with Spatial LIQUFAC The LIQUFAC pull down menu is available through the menu bars associated with ArcView s project view and table windows Starts a new analysis by erasing all info in T ArcView GIS Version 3 0 memory and creating LiciFac a new borehole set Add one or more i sample upr i A eee ER me Remove one or more boreholes from the aan Performs the compilation of geotechnical engineering soil properties through a user controlled database query of the selected set of new bore
23. ume a value for the layer at this borehole 21 SPT N Values The available SPT N Values for a layer are read automatically from the geotechnical database However Spatial LIQUFAC can only accept up to five 5 SPT N values per layer If there are more than five 5 available N Values in the geotechnical database the following message box will appear Borehole 92 Loyer 2 SPT N values x3 Pressing OK will bring up the next message box which prompts the user to select between one I and five 5 N Values for the layer Borehole 92 Layer 2 N value Selection Next the user must select the method to calculate the equivalent SPT N Value for the layer using the dialog box shown below Borehole 92 Layer 2 Equivalent N value 23 Dynamic Soil Properties The dynamic properties of the soil layer are an important parameter in calculating the liquefaction potential and post liquefaction induced vertical settlement The user has four 4 different methods to input the dynamic soil properties The dialog box is shown below rchole 92 Layer 2 Dynamic Soil Properties lt After selecting a method the user must enter the required values for that method Shear Wave Velocity Borehole 92 Layer 2 Shear Wave Velocity Shear Modulus Borehole 92 Layer 2 Shear Modulus 24 Shear Wave Velocity Correlation with SPT N Values Borehole 92 I ayer 2 Vs Corr with SPT N values Ee a eS
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