Stability analysis of unsaturated expansive soil slope

WU Jun-hua; YUAN Jun-ping; LU Ting-hao

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Stability analysis of unsaturated expansive soil slope

更新时间：2026-06-25

- Stability analysis of unsaturated expansive soil slope
- Vol. 29, Issue S1, (2008)
- 作者机构：
  
  1. 河海大学岩土力学与堤坝工程教育部重点实验室,南京,210098
  2. 河海大学岩土工程科学研究所,南京,210098
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：15 April 2016，
  
  Published：2008
- 稿件说明：
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WU Jun-hua, YUAN Jun-ping, LU Ting-hao. Stability analysis of unsaturated expansive soil slope[J]. 2008, 29(S1).
DOI：

WU Jun-hua, YUAN Jun-ping, LU Ting-hao. Stability analysis of unsaturated expansive soil slope[J]. 2008, 29(S1). DOI：

摘要

为了提高非饱和膨胀土边坡的稳定，采用了土工膜覆盖边坡表面的方法。基于非饱和渗流理论，采用有限元程序对用膜覆盖和不覆盖的边坡分别进行了降雨蒸发干湿循环条件下的数值分析。在计算结果基础上，采用极限平衡法分析了边坡的稳定性。结果表明，用膜覆盖后边坡能长期保持非饱和状态，土体吸力较高，其稳定安全系数明显高于无膜保护的边坡，用复合土工膜覆盖边坡有利于提高非饱和膨胀土边坡的稳定。

Abstract

In order to improve the stability of unsaturated expansive soil slope

the method of covering the slope by geo-membrane is applied. Based on unsaturated seepage theory

a finite element program is used to analyze the wetting-drying cycles caused by rainfall and evaporation on slopes covered by geo-membrane and without geo-membrane. Numerical simulation results are used to analyze the slope stability by limit equilibrium method. It is shown that the slope covered by geo-membrane can maintain the unsaturated state for a long period. The matric suction and safety factor of slope covered by geo-membrane is obviously higher than that of without it. The method of covering the slope by geo-membrane is efficient to improve the stability of unsaturated expansive soil slope.

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