Application of Probabilistic Approach in Rock Slope Stability Analysis — An Experience from Nepal

摘要

The main objective of the paper is to apply probabilistic approach in rock slope stability analysis for Nepalese conditions. The probabilistic approach is applied to stability analysis for a road cut slope at tailrace of the Khimti hydropower project in Nepal. The techniques of probabilistic analysis, and in particular the Latin Hypercube technique, provide a methodology for evaluating slope stability that gives more useful information than the value of the factor of safety (FS). The calculations are relatively simple and the method provides an estimate of the probability of failure. To decide the acceptable risk of failure for a particular slope is one of the critical tasks for evaluation of a rock slope. However, there can be no doubt that the probabilistic approach offers a more accurate grasp of the actual condition than any factor of safety.