Discrete Element Method for Slope Stability Analysis

Abstract

Limit equilibrium methods for slope stability analysis do not, in general, satisfy the overall equilibrium conditions; they must make assumptions regarding the inclination and location of the interslice forces. An alternative slope analysis based on the discrete element method is presented to avoid these drawbacks. A slope in the present model is treated as comprised of slices that are connected by elastoplastic Winkler springs. By considering the conditions of compatibility, stresses on the mobilized surface can be obtained that are statically admissible and consistent with the material strength. The formulation of the method is presented and followed by a comparison of the method with limit equilibrium methods. Examples are also shown that demonstrate the applicability of the method to the analysis of progressive failure involving local yield and subsequent stress redistribution.