ABSTRACT
Discontinuities in the form of joints, bedding planes and faults create anisotropy in the rock mass. Discontinuities are the weakest zones in the rock mass. The slope stability analysis of rock masses has been a challenging task due to the presence of discontinuities in various forms which result in different types of slope failures. Failure mechanism of a rock slope mainly depends on the characteristics of discontinuities. This paper deals with the stability assessment of a rock slope in Sikkim by static analysis and pseudo-static analysis using shear strength reduction technique coupled with finite element method and dynamic analysis using time response analysis in PHASE2 software. The results obtained from the parametric analysis are presented in terms of the variations of horizontal and vertical displacements along the face of the slope corresponding to the different acceleration—time histories of different earthquakes. The results obtained from both static and pseudo-static analyses confirmed the global stability of the slope as the FOS in both the cases is more than permissible limit and the displacements observed in case of time response analysis are within the permissible limits.
