Analytical solutions to assess the stability of rock slopes subject to cracks via limit analysis

International Symposium on Geohazards and Geomechanics 2015

地球科学;生态环境科学

Wu, W.^1

School of Engineering, University of Warwick, Coventry, United Kingdom^1

关键词: Critical failures;    Ease-of-use;    Generalized Hoek-Brown failure criterion;    Kinematic approaches;    Limit analysis;    Non-linear strength;    Stability factor;    Upper bound solution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/26/1/012057/pdf
DOI  :  10.1088/1755-1315/26/1/012057

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Based on the kinematic approach of limit analysis, a full set of upper bound solutions for the stability of homogeneous rock slopes subjected to cracks are obtained. The generalized Hoek-Brown failure criterion is adopted to describe the non-linear strength envelope of rocks. In this paper, critical failure mechanisms are determined for cracks of known depth but unspecified location, cracks of known location but unknown depth, and cracks of unspecified location and depth. It is shown that there is a nearly up to 50% drop in terms of the stability factors for rock slopes intersected by cracks compared with intact ones. Tables and charts of solutions in dimensionless forms are presented for ease of use by practitioners.