Abstract

Info

Title:: Inversion of Shear Strength Parameters for Rock and Soil of Slope Based on Strength Reduction Method

Author(s):: ZHU Yan-peng; MA Jin-lian; YE Shuai-hua; MA Xiao-rui; Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology

Keywords:: shear strength parameter; optimization back analysis; strength reduction method; nonlinear analysis; slope

Abstract:: In view of complex mathematical calculations and iterative programming of traditional displacement back analysis, a method combining strength reduction method and displacement optimization back analysis method was presented to calculate shear strength parameters for rock and soil of slope. Doubleparameters model was converted into singleparameter model, the displacement and strength parameters were linked by reduction factors, and finite element analysis, data fitting, least squares optimization were combined to inverse the reduction factors for rock and soil of slope. The reliability of the method was verified by a numerical example. The results show that under the condition of reasonable selection of the initial value, the shear strength for rock and soil of slope can be obtained through the method, and the method not only avoid complex mathematical calculations and iterative programming, but also overcome error induced by twoelement linear regression or nonlinear regression when twoparametric inversion.