Trial Slip Surfaces in SVSLOPE® 2D and 3D


There have been significant improvements in the SVSLOPE 3D software in the last few months related to plotting trial slip surfaces. Trial slip surfaces are the slip surfaces that are analyzed but are not the critical slip surfaces in an analysis. We have fielded numerous requests from customers in the past to allow additional visualization features related to 3-D plotting of trial slip surfaces in the software. These additions have resulted in a number of new features in the latest release.

The new software implements methodologies to view the list of trial slip surfaces in all 2D plane and 3D views in the software. The user must first select which surfaces to view or filter them in a reasonable fashion (i.e., plot all slip surfaces with a FOS between 0.8 to 1.5). The user can select the trial slip surfaces drill down dialog and request that all trial slip surfaces be shown. The user can either select the 10 lowest slip surfaces or to display all valid slip surfaces. The place where the ellipsoid of these trial slip surfaces crosses the plane is displayed. Furthermore the user can click on the tab to display a sorted list of all trial slip surfaces with the lowest factor of safety presented at the top of the list. Each trial slip surface can be selected from the list and is highlighted on the screen as the user clicks on the list.

In a typical 3D model you can see the default display with the columns for the 3-D analysis on the ground and the boundary of the slip surface where it is projected onto the ground surface.

The user can also select the method of what is displayed on the columns. The program defaults to display what material the column cuts through. The user can also contour various values such as mobilized shear resistance or normal force. Thank you for your time and we would look forward to your use of the software on engineering problems. Please contact us to discuss ways your firm can begin using SVSLOPE!

On the default view a single critical slip surface is displayed but the user can display all the trial slip surfaces so the user understands what options were considered in arriving at this particular critical slip surface.

The trial slip surfaces are displayed differently depending on what view the user is in. The user can also view the trial slip surfaces in the XY plain by clicking on the XZ view.

This methodology also works in the YZ plane if you and gives the user a cross-sectional view of the trial slip surfaces. If the user also clicks on any particular column the detailed information for that column will be displayed on a legend.

The user can also perform the same procedure in plan view mode. This view is useful to for determining the lateral extents of all trial slip surfaces. Once again the user can click on any column and the relevant information is displayed.

The user can go back to full 3-D mode and the trial slip surfaces will be projected on the top ground surface. It should be noted that the user can also explode the critical failure mass out of the slope such that the base of the critical mass can be seen in numerical model.

The user can also select the method of what is displayed on the columns. The program defaults to display what material the column cuts through.

Lastly, the user can contour various values such as mobilized shear resistance or normal force.