|Table of Contents|

Numerical limit analysis of stability for bedding rock cutting slope(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2012年02期
Page:
38-45
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Numerical limit analysis of stability for bedding rock cutting slope
Author(s):
CHEN Peng1; 2; XU Bo-hou1
1.School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,Zhejiang,China; 2.Zhejiang Provincial Institute of Communications Planning,Design and Research, Hangzhou 310006,Zhejiang,China
Keywords:
road engineering;  bedding rock slope;  finite element strength reduction method;  limit analysis method;  slope stability analysis;  influence factor
PACS:
U416.14
DOI:
-
Abstract:
According to the key influencing factors of bedding rock cutting slope stability,the influences of slope height,load on the top of slope and engineering protection on the stability of bedding rock slope model with a group of the runned-through planes of weakness were studied by nonlinear FEM srength reduction method,and traditional limit equilibrium method was used for comparison and verification.Analysis result shows that when the slope grade is larger than rock obliquity,it is disadvantageous to slope stability,and safety coefficient decreases with the increase of slope height.When load is applied on the top of slope,the reduction of safety coefficient depends on the relative position between load and runned-through plastic zone.Retaining wall or anchor rod can increase slope safety coefficient by blocking and intercepting runned-through plastic zone,and plastic zone moves to other more weak structural plane,its moving direction depends on initial sustaining strength.The finite element calculation result of safety coefficient based on Drucker-Prager yield criterion is about 22% higher than the result of traditional limit equilibrium method based on Mohr-Coulomb criterion,it is very close to the research result of about 25% by Zheng Ying-ren,et al,so finite element srength reduction method is feasible.5 tabs,14 figs,15 refs.

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Last Update: 2012-04-30