Finite element analysis of steep excavation slope failure by CFS theory

被引：5

作者：

Cheng, Huihong ^{[1
,2
]}

Zhang, Huai ^{[1
,2
]}

Zhu, Bojing ^{[1
,2
]}

Shi, Yaolin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China

[2] Grad Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China

来源：

EARTHQUAKE SCIENCE | 2012年 / 25卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Coulomb failure stress; stabilization and failure evaluation; steep slope excavation;

D O I：

10.1007/s11589-012-0844-4

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The distribution of Coulomb failure stress (CFS) change in the steep excavation slope is calculated by finite element method in this paper, and the failure mechanics under different conditions have been investigated. Comparing the CFSs before and after the slope excavation (stress loading and unloading processes), the dangerous internal zone and the most likely failure external area are attained. Given the shear cracks on the top surface while tensile stress or cracks along the toe of the slope, we analyze the high cutting-angle steep slope in Kaixian county of the Three Gorges Reservoir region. We bring forward that the peak value of CFS after excavation can reach to the order of 0.1 MPa, which is greatly higher than that of before. Our preliminary results are useful for optimizing the reinforcement structure during the steep slope stabilization engineering.

引用

页码：177 / 185

页数：9

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