STUDY OF SLOPE STABILITY USING GEOSYNTHETICS

Abstract

During the monsoons, significant precipitation falls upon the Shimla district of the Lesser Himalayas. During rainy seasons, slope failures produce landslides in the region. The Shimla district has a significant problem with landslides. More landslides and subsidence’s have occurred in recent decades because of the construction of roads and buildings on top of a weak geological structure. A feasible option is to incorporate the geosynthetics into the slope in order to provide the drainage as well as reinforcement required to safeguard the stability of slope in the event of precipitation. In this paper, GeoStudio was used to investigate the impact of precipitation over the drainage factors & overall slope stability together with & without geosynthetics. This study examines the stability of a failing slope located in the Shimla region of Himachal Pradesh using numerical modelling before and after rainfalls of varying intensities, including max. rainfall, min. rainfall, & avg. rainfall. Before rainfall or monsoon, the factor of safety was higher than 1, showing a stable slope. For slopes with slope angles of 37.65° and 42°, the factor of safety at maximum rainfall was calculated to be 0.992 and 0.928, which is less than 1, indicating an unstable slope. Now the failed slopes were stabilised using geosynthetics in 3,4,5 and 6 layers. After using geosynthetics slope were stabilised and their factor of safety came out to be greater than 1.