A STABILITY ANALYSIS METHOD USING ADAPTIVE GENETIC ALGORITHMS FOR GEOTECHNICAL SLOPE UNDER NaCI EROSION ENVIRONMENT

摘要

The increasingly serious environmental pollution problem leads to more and more chemical substances in the rock and soil,which not only affects the geotechnical engineering properties,but also the slope landslide induced by erosion will have a worse impact on the environmental pollution and human security.In order to study the influence of main influencing factors on slope stability under salt erosion environment,orthogonal test analysis was carried out on rock slope eroded by NaCl.In this paper,genetic algorithm is introduced into slope stability analysis to improve the efficiency and accuracy of slope stability analysis.Firstly,the most dangerous sliding surface of eroded rock slope is searched by adaptive genetic algorithm,and the position of the most dangerous sliding surface is obtained.Then stability analysis is carried out by Bishop slice method,and reliability calculation model of slope is established.Finally,the slope stability simulation of Monte Carlo method is realized by using the software of MATLAB,and the slope reliability simulation calculation is carried out.As can be shown from the experimental results,the variation of geotechnical parameters has a great influence on the reliability index values.Moreover,under the combination of different variation coefficients,the combination with larger variation coefficients and smaller relative variation coefficients has greater impact on the reliability index.