Title of Dissertation Seismic Slope Stability of Embankment Dam

Abstract

Slope stability is an important concern in the creation of artificial slope & natural slope the necessary criterion for stability analysis is the factor of safety counter to sliding which should be always greater than or equal to one for the slope to be safe. This is true when the slope the slope experiences elastic deformation only. But in case of a strong earthquake motion, the deformation of slope may exceed elastic limit and hence stable displacements can take place. In that case factor of safety as stability measure becomes of no importance and magnitude of the stable displacements turn into measure for calculate approximately the overall stability of the slope. The purpose of the dissertation is to find out the factor of safety of the given Embankment dam slope i.e. Tehri Dam under static and dynamic loading (earthquake) condition using Finite Element Method. This study also involves analysis of the slope stability by Pseudo-Static Process. The probability of permanent displacement of the slope because of three earthquake motions is analysed in this study. The earthquake records considered for this purpose are: Chamoli earthquake 1999, Uttarkashi earthquake 1991,Nepal earthquake 2015.