Slope stability analysis using Bishop and Finite Element Methods

Abstract

Analysis of slope stability in this study aims to determine the safety factor (SF) of the landslide for the existing and the reinforcement condition. The study case was in STA 84+910 of national road Meulaboh-Geumpang, West Aceh Regency in Aceh Province. The condition of the Meulaboh-Geumpang road often causes landslides due to the topography of the area and is also triggered by rainfall. The analysis of safety factor for the existing condition was calculated by using the Bishop method that assumes a circular failure surface and the calculation was also validated by the finite element method using 2D Plaxis version 8.6 software. However, computation requires iterative procedures because of the nonlinear relationship for the safety factors. The result obtained from calculations using the Bishop method for the existing condition is 1.08, while by using Plaxis software, the result is 1.10, which means the slopes are in unstable conditions and need to be reinforced to prevent landslides. Alternative reinforcement was conducted by using sheet pile and calculations performed using 2D Plaxis version 8.6 software. Variations in the placement of sheet piles are at the upper and middle of the slope. The results obtained from the calculation of the safety factor after reinforcement are 1.57 (with a 12m sheet pile depth at the upper slope) and 1.48 (with a 10m sheet pile depth in the middle of the slope).

A Novel Multi-Objective Particle Swarm Optimized RF-SVR Model for Reinforced Soil Slope Stability Analysis

“…The result found that, with an increase in the height of the slopes, the factor of safety decreased. Various authors have conducted soil slope analyses based on different parameters and reported improved results [18][19][20][21][22][23][24].…”

“…The model was successfully implemented in a finite element code, and its performance was demonstrated through various numerical examples. Sungkar et al [19] conducted a slope stability analysis using both Bishop and FEM. The study evaluates the safety factor of a landslideprone area on a national road.…”

Slope Stability Analysis Using Bishop Method and Slide 2D Software at Sand Stone Mining in Sedau Village, Narmada District, Lombok Barat Regency

“…The concept of slope stability is very much needed in developing the current use of slopes [2]. Due to the increasing use of slopes for the benefit of mankind, it is necessary to develop the concept of slope stability to overcome the problem of landslides on slopes [3].…”

Reconstruction of Natural Slope Stability by Limit Equilibrium Methods and Finite Element Methods

“…We employ the Limit Equilibrium Method (LEM) and Finite Element Method (FEM) to comprehensively evaluate safety factor results, comparing empirical and numerical calculations for slope stability. The Finite Element Method (FEM) is a precise and versatile approach that eliminates the need for assumptions regarding the type of slope failure ( (Sungkar et al, 2020). In this study, FEM is employed to assess both the magnitude and direction of soil displacement caused by landslides, validating the obtained safety factor.…”