American Society of Civil Engineers

Search for Critical Slip Surface and Reliability Analysis of Soil Slope Stability Based on MATLAB

by Sheng Zeng, (School of Nuclear Resources and Safety Engineering, University of South China, Hengyang, China E-mail:, Bing Sun, (School of Resource and Safety Engineering, Central South University, Changsha, China E-mail:, Shijiao Yang, (No affiliation information available.), and Kaixuan Tan, (No affiliation information available.)
Section: Earth Retaining Walls and Slope Stability, pp. 184-189, (doi:

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Document type: Conference Proceeding Paper
Part of: Slope Stability, Retaining Walls, and Foundations: Selected Papers from the 2009 GeoHunan International Conference
Abstract: The stability analysis of slope is a popular topic in geotechnical engineering, however, the key of stability analysis is how to determine the most dangerous sliding surface, but the traditional method is determined according to experience. Because the genetic algorithm has powerful adaptability and does well in searching the global optimum solution, it was applied to analyze the stability of slope based on the premise of circular sliding surface and the ideal of genetic algorithm. The realization on the genetic algorithm of circular sliding surface is to found circular failure analysis model based on the Bishop method and to search the circle center coordinate of the most dangerous sliding surface with the genetic algorithm toolbox of MATLAB. Then an interface program for the reliability analysis of soil slope stability is developed depended on the platform of MATLAB. The analysis of the numerical example shows that the method of this paper has a higher accuracy, higher iterative convergence speed and stronger adaptability than the traditional calculation method, and that the reliability of the most dangerous sliding surface is the minimum reliability, which provides reference for the optimization design of slope.

ASCE Subject Headings:
Slope stability