Numerical Analysis of Slope Stability by Strength Reduction in Finite Elements Using ANSYS a Case Study of Qinglong-Xingyi Expressway Contract Section T1(K11+790~K11+875)

Abstract

This research aims at examining the stability condition of the slope on which Qinglong-Xingyi Expressway Contract Section T1(K11+790~K11+875) is built as well as put forward a suitable stabilization method. A 2D simulation model of the slope was developed for analysis using the Finite Element Software ANSYS. The main slip section (K11+850) was considered for developing the 2D model of the slope for simulation. The simulation results revealed a deep-seated failure surface in slip zone. The safety factor of the slope after the landslide was found to be 1.085, just around equilibrium. This meant that the slope was highly susceptible to failure in case of any trigger mechanisms hence reinforcement was inevitable in order to keep any eventuality at bay. Piles embedded in the bedrock were the best reinforcement method to contain the deep-seated failure surface developing in the sliding layer. Assurance of slope stability after reinforcement with piles is evident in the disappearance of the failure surface in the plastic strain plot, significant reduction in displacement, plastic strain and stress values. The findings of this research serve to strengthen numerical analysis by strength reduction as a tool for decision making in taking care of slope stability issues.

A Comprehensive Numerical Modeling Study for Parameter Optimization and Slope Stability Analysis in the Baganuur Lignite Coal Mine

“…Young s modulus and Poisson s ratio have a profound influence on the computed deformations prior to slope failure, but they have little influence on the predicted factor of safety in slope stability analysis. The (7) where C f and Ø f are…”

“…As a result, the threat to human life and technical and financial harm from open-pit mining are increasing. In geotechnical engineering, the numerical calculation method is frequently employed [3][4][5][6][7][8]. Computer software can be used to display a realistic slope, its geological surroundings, strata, and lithology, as well as whether or not there is a joint surface, and analyze the failure mechanism in light of the outcomes of simulation calculations [9].…”