GGU-STABILITY: Step 11: Analyse the slope (Ex. 1)

After defining the slip bodies the system can be analysed. Select the menu item "Analyse slip bodies" from the "Utilisation factors" menu. The following note is shown:

If the slip surface coincides with the geosynthetics, the tangent of the friction angle is multiplied by the geosynthetics reduction factor µ and correspondingly adopted for analysis. After confirming the note the following dialog box opens:

Adjust the number of slices to suit your wishes. If the "Test passive earth pressure wedge" check box is activated, the program will examine whether gradients greater than 45° - /2 occur in the passive earth pressure region of the respective slip body. These slip bodies will not be investigated. Slip body movement should to the "left". Begin calculation of all slip bodies using the "All" button. Once calculations are complete you will be shown some statistics.

Beside stability, the maximum geosynthetics forces resulting from slip body variation are determined. After confirming with "OK", the slip body with the lowest FOS is displayed. In the "Utilisation factors" menu, point at the "Show individual slip bodies" or "All" menu items in order to display other slip bodies or, indeed, all slip bodies.