The Rocscience International Conference 2021 Proceedings are now available. Read Now
 

Search Results

Sarma Interslice Strength

In both Sarma vertical slice and Sarma non-vertical slice methods, the factor of safety is affected by the strength parameters along the slice boundary. The values of cohesion and friction angle can be determined using Computed Average Value or User-Defined options.

Computed Average Value

If the Computed Average Value option is selected, the cohesion and friction angle will be calculated automatically for each slice boundary.

The cohesion along the slice boundary is calculated using a weighted average:

Cohesion Weighted Average Equation

The friction angle along the slice boundary is estimated using a weighted average:

Friction Angle Weighted Average Equation

where c_i and phi_i are the cohesion and friction angle of the material layer i along the slice boundary, and h_i is the length of the segment of the slice boundary that lies within that material layer. These variables are shown for one slice in the diagram below:

Sliced Boundary Diagram

User-Defined

If the User-Defined option is selected, the cohesion and friction angle specified will be used instead of the average values for all slices.

Limitations

If a slice boundary passes through an infinite strength material, the average strength parameters along the slice cannot be calculated using the Computed Average Values option. In this case it is recommended to use the User-Defined option for calculating the average strength parameters.

Account Icon - click here to log in or out of your account Shopping Cart icon Click here to search our site Click here to close Learning Tech Support Documentation Info Chevron Delete Back to Top View More" PDF File Calendar Location Language Fees Video Click here to visit Rocscience's LinkedIn page Click here to visit Rocscience's YouTube page Click here to visit Rocscience's Twitter page Click here to visit Rocscience's Facebook page Click here to visit Rocscience's Instagram page Bookmark Network Scroll down for more Checkmark Download Print Back to top Single User Multiple Users CPillar Dips EX3 RocFall RocPlane RocSupport RocTopple RS2 RS3 RSData RSPile Settle3 Slide2 Slide3 SWedge UnWedge Commercial License Education License Trial License Shop safe & secure Money-back guarantee