SVFlux Tutorial Manual
Contents
1. 1 466 34 0 7 20 5 0 0 5 4 0 8 5 13 0 17 5 22 0 26 5 31 0 35 5 40 0 The correct results for this example are Method SVSLOPE Moment Force Bishop Simplified 1 466 Spencer 1 469 1 469 M P 1 468 1 468 GLE 1 468 1 468 SOILVISION SYSTEMS LTD Weak Layer Example 13 of 22 3 Weak Layer Example This is a more complex example involving a weak layer pore water pressures and surcharges The ACADS verification program received a wide range of answers for this model and fully expected this during the program The soil parameters external loadings and piezometric surface are shown in the following diagram Tension cracks are ignored in this example The model requirement is that the noncircular slip surface and the corresponding factor of safety are required This original model can be found under Project Slopes Group 1 Model VS 9 Minimum authorization required to complete this tutorial FULL The STUDENT version of this software will not allow this model to be analyzed Only purchased and authorized versions of SVSlope will allow entry and solving of this tutorial 3 1 Model Description and Geometry A block search for the critical noncircular failure surface is carried out by defining two line searches to block search squares within the weak layer A number of different random surfaces were generated by the search and the results compared well with the actual results b 20 27 752. SUSLOPE 2D Slope Stability Modeling Software Tutorial Manual ED 1A Date March 7 2007 Written by Murray Fredlund Ph D Tiequn Feng Ph D Robert Thode B Sc G E Edited by Murray Fredlund Ph D SoilVision Systems Ltd Saskatoon Saskatchewan Canada Software License The software described in this manual is furnished under a license agreement The software may be used or copied only in accordance with the terms of the agreement Software Support Support for the software is furnished under the terms of a support agreement Copyright Information contained within this User s Manual is copyrighted and all rights are reserved by Soil Vision Systems Ltd The SVSLOPE software is a proprietary product and trade secret of Soil Vision Systems The Tutorial Manual may be reproduced or copied in whole or in part by the software licensee for use with running the software The Tutorial Manual may not be reproduced or copied in any form or by any means for the purpose of selling the copies Disclaimer of Warranty SoilVision Systems Ltd reserves the right to make periodic modifications of this product without obligation to notify any person of such revision SoilVision does not guarantee warrant or make any representation regarding the use of or the results of the programs in terms of correctness accuracy reliability currentness or otherwise the user is expected to make the final evaluation in the context of his her own
3. This action will finish the calculations and save the results 3 Click on the Close button to close the dialog h Visualize Results After the model has been run an ACUMESH notification will appear asking if you want to view the results in ACUMESH Click on Yes The SVSLOPE screen will then change to reflect the results as visualized by ACUMESH as appears in the diagrams following To switch back and forth between your original geometry and ACUMESH click on the SVSLOPE or ACUMESH icon which appears below the toolbars on the top left hand side of the screen To switch between the results of the different methods selected click on the drop down menu as shown below at the top of the screen and select the method you would like to view Ordinary A 2 3 Results amp Discussion If the model has been appropriately entered into the software the approximate following results should be shown for the Bishop method The user may display results from different methods by clicking the combo box on the display which lists the different analysis methods Bishop Spencer etc It should be noted that it is typically recommended that the search grid of centers be somewhat larger in order to ensure that a critical center is not missed SOILVISION SYSTEMS LTD Basic Slope 12 of 22 Materials Upper Soil Cohesion 5 kPa Phi 20 deg Unit Weight 15 kN m 3 Lower Soil Cohesion 10 kPa Phi 25 deg Unit Weight 18 kNIm 3 FoS
4. Region R3 x m y m 20 18 20 15 84 15 84 36 NOTE If an error is made when entering the region geometry the user may recover from the error and start again by one of the following methods a Press the escape esc key b Select a Region Shape and press the de ete key c Use the Undo function on the Edit menu If all model geometry has been entered correctly the shape should look like the diagram at the beginning of this tutorial d Specify Search Method This particular model makes use of a block search methodology The block search parameters may be entered through the following steps 1 Open the block search dialog through the Model gt Slip Surface gt Block Search menu option 2 Enterthe block search data as specified in the previous section 3 Click OK to close the dialog e Specify Initial Conditions Initial conditions are generally associated with transient model runs Their purpose is to provide a reasonable starting point for the solver In a steady state model initial conditions can be used to precondition the solver to allow faster convergence Generally speaking the user will enter information either for a water table or a piezometric line In this model a piezometric line will be used In order to specify that a piezometric line will be entered the user needs to following these steps 1 Select Model gt Initial Conditions gt Settings 2 Select Water Surfaces as the Pore Water Pressure Method
5. 3 Press OK to close the dialog The user must then proceed to graphically enter the piezometric line 1 Select Model Initial Conditions Piezometric Line 2 Under the Points tab click on the New Line button SOILVISION SYSTEMS LTD Weak Layer Example 19 of 22 3 Enterin the X m and Y m co ordinates as provided at the start of this tutorial 4 Under the Apply to Regions section put a check mark in the Ri R2 and R3 boxes to apply the line to both regions 5 Press OK to close the dialog f Specify Loading Conditions Two distributed loads are applied in this numerical model The instructions for applying these distributed loads are as follows 1 Select Draw gt Loading gt Distributed Load then 2 Enter the data as provided in the previous section 3 Click OK to close the dialog You will need to do this for each load separately g Apply Material Properties The next step in defining the model is to enter the material properties for the two materials that will be used in the model R1 region will have the Upper Soil applied to it and R2 will have the Lower Soil applied to it This section will provide instructions on creating the Upper Soil Repeat the process to add the second material 1 Open the Materials dialog by selecting Model gt Materials gt Manager from the menu Click the New button to create a material 3 Enter Upper Soil for the material name in the dialog that appears and choose Mohr Coulomb fo
6. appears and choose Mohr Coulomb for the Shear Strength type of this material 4 Press OK to close the dialog The Material Properties dialog will open automatically NOTE When a new material is created you can specify the display color of the material using the Fill Color box on the Material Properties menu Any region that has a material assigned to it will display that material s fill color Move to the Shear Strength tab Enter the Unit Weight value of 15 000 kN m 3 Enter the Cohesion c value of 5 000 Pa Enter the Friction Angle phi value of 20 000 deg DM gro SOILVISION SYSTEMS LTD Basic Slope 11 of 22 9 Click the OK button to close the Shear Strength dialog 10 Repeat these steps to create the Lower Soil material using the information provided at the beginning of the tutorial Once all material properties have been entered we must apply the materials to the corresponding regions 1 Open the Region Properties dialog by selecting Model gt Geometry gt Region Properties from the menu Select the R1 region and assign the Upper Soil material to this region 3 Select the R2 region and assign the Lower Soil material to this region 4 Press the OK button to accept the changes and close the dialog g Run Model The next step is to analyze the model 1 Select Solve gt Analyze from the menu A pop up dialog will appear 2 Click on the green arrow button on the bottom of the dialog to start the solver
7. Offsets as zero x maximum 90 y maximum 60 x minimum 15 y minimum 10 8 Click on OK The new model will be automatically added under the UserTutorial project SVSLOPE now opens to show a grid and the Options dialog View gt Options pops up Click OK to accept the default horizontal and vertical grid spacing of 1 0 b Specify Analysis Settings In SVSlope the Analysis Settings provide the information for what model output will be available in ACUMESH These settings will be specified as follows Select Model gt Settings from the menu 2 Moveto the Slip Surface tab and ensure that the following items are selected Slope Direction Left to Right Slip Shape Non Circular Search Method Block 3 Select the Calculation Methods tab from the dialog and select the method types as shown below Spencer GLE SOILVISION SYSTEMS LTD Weak Layer Example 17 of 22 4 Press OK to close the dialog c Enter Geometry Model geometry is defined as a series of layers and can be either drawn by the user or defined as a set of coordinates Model Geometry can be imported from either DXF files or from existing models This model will be divided into three regions which are named R1 R2 and R3 Each region will have one of the materials specified as its material properties To add the necessary regions follow these steps 1 Open the Regions dialog by selecting Model gt Geometry gt Regions from the menu Press the New bu
8. er hand In particular this tutorial manual is designed to guide users through the range of reasonable models which may be encountered in typical slope stability modeling The following examples represent the most typical models encountered in the traditional slope stability modeling practice and therefore include 1 Basic slope grid and radius and 2 Weak layer example SOILVISION SYSTEMS LTD Basic Slope 5 of 22 2 Basic Slope The following example will introduce some of the features included in SVSLOPE and will set up a model using limited equilibrium method of slices and the Grid and Radius search method for circular slip surfaces The purpose of this model is to determine the factor of safety of a simple model The model dimensions and material properties are in the next section This example consists of a simple two layers slope with a water table The problem is analyzed using the Bishop Simplified method as well as the Morgenstern Price method The purpose of this example is to illustrate the calculation of the factor of safety for a simple slope example This original model can be found under Project Slopes_Group_2 Model VW_9 Minimum authorization required to complete this tutorial STUDENT 2 1 Model Description and Geometry Region R1 x m y m 0 9 0 14 10 14 20 9 Region R2 SOILVISION SYSTEMS LTD Basic Slope 6 of 22 X y IN 88Yolo3 o
9. h the calculations and save the results 3 Click on the C ose button to close the dialog i Visualize Results After the model has been run an ACUMESH notification will appear asking if you want to view the results in ACUMESH Click on Yes The SVSLOPE screen will then change to reflect the results as visualized by ACUMESH as appears in the diagrams following To switch back and forth between your original geometry and ACUMESH click on the SVSLOPE or ACUMESH icon which appears below the toolbars on the top left hand side of the screen To switch between the results of the different methods selected click on the drop down menu as shown below at the top of the screen and select the method you would like to view Crdinary 3 3 Results amp Discussion After the model is completed the user may view the results in the ACUMESH software by pressing the open ACUMESH icon on the process toolbar The results will contain all trial slip surfaces as well as the most critical slip surface results In order to identify the most critical slip surface the user may perform the following steps 1 Select Slip Surfaces from the menu item and 2 Click the Show Trial Slip Surfaces button this will cause all the trial slip surfaces to not be displayed The user may also plot the slices used in the analysis of the critical slip surfaces through the slips show slices menu option The information on any particular slice may be displayed through the s
10. he grid and tangent graphics should now be displayed on the CAD window e Specify Initial Conditions A water table or a piezometric line must be specified as an initial condition for this model In this model a piezometric line will be used In order to specify that a piezometric line will be entered the user needs to following these steps 1 Select Model Initial Conditions Settings Select Water Surfaces as the Pore Water Pressure Method 3 Press OK to close the dialog The user must then proceed to graphically enter the piezometric line Select Model Initial Conditions Piezometric Line Under the Points tab click on the New Line button Enter in the X m and Y m co ordinates as provided at the start of this tutorial Under the Apply to Regions section put a check mark in the R1 R2 and R3 boxes to apply the line to both regions E E E 5 Press OK to close the dialog f Apply Material Properties The next step in defining the model is to enter the material properties for the two materials that will be used in the model R1 region will have the Upper Soil applied to it and R2 will have the Lower Soil applied to it This section will provide instructions on creating the Upper Soil Repeat the process to add the second material 1 Open the Materials dialog by selecting Model Materials Manager from the menu Click the New button to create a material Enter Upper Soil for the material name in the dialog that
11. ial conditions Specify loading conditions Apply material properties 50 D N oo Run model Visualize results The details of these outlined steps are detailed in the following sections a Create Model Since FULL authorization is required for this tutorial the user must perform the following steps to ensure full authorization is activated Plug in the USB security key 2 Goto the File gt Authorization dialog on the SVOFFICE Manager Software should display full authorization If not it means that the security codes provided by SoilVision Systems at the time of purchase have not yet been entered Please see the the Authorization section of the SVOFFICE User s Manual for instructions on entering these codes The following steps are required to create the model 1 Open the SVOFFICE Manager dialog 2 Select ALL for the Application Model Origin and Category combo boxes 3 Create a new project called UserTutorial by pressing the New button next to the SOILVISION SYSTEMS LTD Weak Layer Example 16 of 22 list of projects 4 Create a new model called Weak Layer Example by pressing the New button next to the list of models Use the settings below when creating this new model Application SVSLOPE Model Name Weak Layer Example Type Steady State Units Metric Slope Direction Left to Right Click on the World Coordinate System tab Enter the World Coordinates System coordinates shown below into the dialog leave Global
12. js s ojo og 40 Material Properties Material c kN m degrees y kN m Upper Soil 5 0 20 0 15 00 Lower Soil 10 0 25 0 18 00 Grid and Tangent Grid x m y m 23 25 22 19 26 19 Tangent x m y m 15 4 15 2 29 2 29 4 Piezometric Line x m y m 0 11 15 8 30 3 40 3 2 2 Model Setup In order to set up the model described in the preceding section the following steps will be required The steps fall under the general categories of a Create model SOILVISION SYSTEMS LTD Basic Slope 7 of 22 Specify analysis settings Enter geometry Specify search method Specify initial conditions Apply material properties Run model 5055000 Visualize results The details of these outlined steps are detailed in the following sections a Create Model Since FULL authorization is required for this tutorial the user must perform the following steps to ensure full authorization is activated 1 Plugin the USB security key Goto the File gt Authorization dialog on the SVOFFICE Manager 3 Software should display full authorization If not it means that the security codes provided by SoilVision Systems at the time of purchase have not yet been entered Please see the the Authorization section of the SVOFFICE User s Manual for instructions on entering these codes The following steps are required to crea
13. lips slice information dialog A slice information dialog will appear and the user may click on a new particular slice on the slope to display the details of that slice The analysis results in a factor of safety of 0 732 SOILVISION SYSTEMS LTD Weak Layer Example 21 of 22 SOILVISION SYSTEMS LTD This page is left blank intentionally Weak Layer Example 22 of 22
14. problems Trademarks Windows is a registered trademark of Microsoft Corporation Soil Vision is a registered trademark of Soil Vision Systems Ltd SVFLUX is a trademark of Soil Vision Systems Ltd CHEMFLUX is a trademark of SoilVision Systems Ltd SVSOLID is a trademark of Soil Vision Systems Ltd SVHEAT is a trademark of SoilVision Systems Ltd SVSLOPE is a trademark of Soil Vision Systems Ltd ACUMESH is a trademark of Soil Vision Systems Ltd FlexPDE is a registered trademark of PDE Solutions Inc Copyright 2008 by Soil Vision Systems Ltd Saskatoon Saskatchewan Canada ALLRIGHTS RESERVED Printed in Canada SOILVISION SYSTEMS LTD Table of Contents LA L dntroductiQna zc cet eet ie Eo HE CURE S ERAN Auc 2 Basic Slope ES 2 1 Model Description and Geometry re 2 2 Model Setup entree dried eie deni m 2 3 Results amp Discussion esee nn 3 Weak Layer Example ss sites 3 1 Model Description and Geometry Sua id 3 2 Model Setup uio ihe aad eee dei A 3 3 Results amp Discussion of aun A 11 13 13 15 20 22 SOILVISION SYSTEMS LTD Introduction 4 of 22 1 Introduction The Tutorial Manual serves a special role in guiding the first time users of the SVSLOPE software through a typical example problem The example is typical in the sense that it is not too rigorous on one hand and not too simple on the oth
15. r the Shear Strength type of this material 4 Press OK to close the dialog The Material Properties dialog will open automatically NOTE When a new material is created you can specify the display color of the material using the Fill Color box on the Material Properties menu Any region that has a material assigned to it will display that material s fill color Move to the Shear Strength tab Enter the Unit Weight value of 15 000 kN m 3 Enter the Cohesion c value of 5 000 Pa Enter the Friction Angle phi value of 20 000 degrees Click the OK button to close the Shear Strength dialog 10 Repeat these steps to create the Lower Soil material using the information pon 9 uw provided at the beginning of the tutorial Once all material properties have been entered we must apply the materials to the corresponding regions 1 Open the Region Properties dialog by selecting Model gt Geometry gt Region Properties from the menu SOILVISION SYSTEMS LTD Weak Layer Example 20 of 22 2 Select the R1 region and assign the Upper Soil material to this region 3 Select the R2 region and assign the Lower Soil material to this region 4 Press the OK button to accept the changes and close the dialog h Run Model The next step is to analyze the model 1 Select Solve gt Analyze from the menu A pop up dialog will appear 2 Click on the green arrow button on the bottom of the dialog to start the solver This action will finis
16. s tab from the dialog and select the method type as shown below Bishop 4 Press OK to close the dialog c Enter Geometry Model geometry is defined as a series of layers and can be either drawn by the user or defined as a set of coordinates Model Geometry can be imported from either DXF files or from existing models This model will be divided into two regions which are named R1 and R2 Each region will have one of the materials specified as its material properties The shapes that define each material region will now be created Note that when drawing a geometric shape information will be added to the region that is current in the Region Selector The Region Selector is at the top of the workspace e Define R1 Region Select Draw gt Model Geometry gt Polygon Region from the menu The cursor will now be changed to a cross hair Move the cursor near 0 9 in the drawing space You can view the coordinates of the current position of the mouse in the status bar 4 To select the point as part of the shape left click on the point 5 Now move the cursor near 0 14 and left click the mouse A line is now drawn from 0 9 to 0 14 6 In the same manner then enter the following points SOILVISION SYSTEMS LTD Basic Slope 9 of 22 10 14 20 9 7 Move the cursor near the point 20 9 Double click on the point to finish the shape A line is now drawn from 0 9 to 20 9 and the shape is automatically finished by SVSLOPE b
17. sn An 84 15 Region R1 x m y m 20 27 20 18 84 36 84 40 67 40 43 27 Region R2 x m y m 20 18 SOILVISION SYSTEMS LTD 20 18 84 36 84 36 Region R3 x m y m 20 18 20 15 84 15 84 36 Material Properties Weak Layer Example Material c kN m p degrees y kN m Soil 1 28 5 20 0 18 84 Soil 2 0 0 10 0 18 84 Piezometric Line Pt 4 Xc m Yc m 1 20 0 27 75 2 43 0 27 75 3 49 0 29 8 4 60 0 34 0 5 66 0 35 8 6 74 0 37 6 7 80 0 38 4 8 84 0 38 4 Loading X m Y m Normal Stress kN m 23 00 27 75 20 00 43 00 27 75 20 00 70 00 40 00 20 00 80 00 40 00 40 00 Block Search Parameters Left Block 43 24 807 43 24 807 50 26 769 X increments 10 Y increments 1 Start Angle 135 degrees 14 of 22 SOILVISION SYSTEMS LTD Weak Layer Example 15 of 22 End Angle 155 degrees Left Increments 2 Right Block 70 32 376 70 32 376 80 35 179 X increments 10 Y increments 1 Start Angle 45 degrees End Angle 65 degrees Left Increments 2 3 2 Model Setup In order to set up the model described in the preceding section the following steps will be required The steps fall under the general categories of Create model Specify analysis settings Enter geometry Specify search method Specify init
18. te the model Open the SVOFFICE Manager dialog 2 Select ALL under the Applications combo box and ALL for the Model Origin combo box 3 Create a new project called UserTutorial by pressing the New button next to the list of projects 4 Create a new model called Basic Slope by pressing the New button next to the list of models Use the settings below when creating this new model Application SVSLOPE Model Name Basic Slope Units Metric Slope Direction Left to Right Click on the World Coordinate System tab 7 Enter the World Coordinates System coordinates shown below into the dialog leave Global Offsets as zero x maximum 40 y maximum 25 X minimum 5 SOILVISION SYSTEMS LTD Basic Slope 8 of 22 y minimum 2 8 Click on OK The new model will be automatically added under the recently created UserTutorial project SVSLOPE now opens to show a grid and the Options dialog View gt Options pops up Click OK to accept the default horizontal and vertical grid spacing of 1 0 b Specify Analysis Settings In SVSlope the Analysis Settings provide the information for what model output will be available in ACUMESH These settings will be specified as follows Select Model gt Settings from the menu 2 Move to the Slip Surface tab and ensure that the following items are selected Slope Direction Left to Right Slip Shape Circular Search Method Grid and Tangent 3 Select the Calculation Method
19. tton to add a second region and name it R2 Click OK to close the dialog The shapes that define each material region will now be created Note that when drawing a geometric shape information will be added to the region that is current in the Region Selector The Region Selector is at the top of the workspace e Define R1 Region 1 Ensure the R1 region is current in the region selector The region selector appears underneath the menus at the top of the screen Select Draw Model Geometry Polygon Region from the menu 3 The cursor will now be changed to cross hairs Move the cursor near 20 27 in the drawing space You can view the coordinates of the current position the mouse is at in the status bar just above the command line 5 When the cursor is near the point left click This will cause the cursor to snap to the point The SNAP and GRID options in the status bar must both be on 6 Now move the cursor near 20 18 and left click A line is now drawn from 20 27 to 20 18 7 In the same manner then enter the following points 84 36 84 40 67 40 43 27 8 Move the cursor near the point 43 27 and double click on the point to finish the shape Repeat this process to define the R2 and R3 regions according to the information provided at the start of this tutorial Region R2 SOILVISION SYSTEMS LTD Weak Layer Example 18 of 22 x m y m 20 18 20 18 84 36 84 36
20. y drawing a line from 20 9 back to the start point 0 9 Repeat this process to define the R2 region according to the information provided at the start of this tutorial Region R2 x m y 0 0 20 30 40 40 oO R RIoOjor NOTE If an error is made when entering the region geometry the user may recover from the error and start again by one of the following methods a Press the escape esc key b Select a region shape and press the delete key c Use the Undo function on the Edit menu If all model geometry has been entered correctly the shape should look like the diagram at the beginning of this tutorial d Specify Search Method The Grid and Tangent method of searching for the critical slip surface has already been selected in the previous step Now the user must draw the graphical representation of the grid and tangent objects on the screen This is accomplished through the following steps GRID 1 Select Model Slip Surface Grid and Tangent 2 Select the Grid tab 3 Enterthe values for the grid as specified at the start of this tutorial the grid values may also be drawn on the CAD window 4 Move to entering the tangent values TANGENT 1 Select the Tangent tab 2 Enterthe values for the tangent as specified at the start of this tutorial the grid values may also be drawn on the CAD window SOILVISION SYSTEMS LTD Basic Slope 10 of 22 3 Close the dialog T
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