Analysis of slope stability by the planning of cantilever retaining wall reinforcement using the application of Plaxis (case study: Substation Panyabungan sta 0+060)

Abstract

Slope is a natural surface appearance that has height differences. Slope stability is very closely related to landslide or ground movement which is a natural process of soil mass displacement from higher ground to lower ground. Unstable slopes are very dangerous to the surroundings; therefore, an analysis of slope stability is highly needed. In this research, Plaxis are used to planning cantilever retaining wall reinforcement with the aim to determine the safety factor value of the slope condition before and after was given reinforcement. Slope stability was analyzed in three conditions: the original condition before reinforcement, the condition with the planning of cantilever retaining wall reinforcement. The safety factor value in the slope condition with cantilever retaining wall reinforcement was 1,567 > 1,3 (Safe). Deformation value was 453,280 × 10-3 m. Cantilever retaining wall safety factor against gulling was 2,528 > 2 (Safe). Safety factor against shear was 2,683 >1,5 (Safe). Safety factor against bearing capacity was 3,704 > 3 (Safe).