CASE STUDY ON SLOPE STABILITY ANALYSIS OF RAILWAY EMBANKMENT

Abstract

In this case study, slope stability analysis of railway embankment of height 28 m was carried out by numerical modelling using finite element method. The Factor of safety was computed using PLAXIS 2D CE V20 with 32.5 tons axle loading. The soil for embankment was black cotton soil which is highly expansive in nature. Field test data were used for modelling of the railway embankment. Stiffness Parameters of different components of rail way track were studied in details. Staged Construction of the embankment was carried out and deformation and factor of safety result were presented. Soil model for different parts of embankment were included in the analysis. Rail and Sleeper were Linear elastic and Subgrade was modeled Using Mohr coulomb model for soil. The effective cohesion of black cotton soil had significant impact on the factor of safety. However it shows large deformation on failure for which blanket material was laid below ballasts. Further Stability was enhanced by providing turfing on side slopes. Step by Step modelling on PLAXIS 2D CE V20 was carried out in this study.