| 非饱和膨胀土边坡的稳定性分析 |
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| 引用本文： | 吴珺华,YUAN Jun-ping,袁俊平,卢廷浩.非饱和膨胀土边坡的稳定性分析[J].岩土力学,2008,29(Z1):363-367. |
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| 作者姓名： | 吴珺华 YUAN Jun-ping 袁俊平 卢廷浩 |
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| 作者单位： | 河海大学,岩土力学与堤坝工程教育部重点实验室,南京,210098;河海大学,岩土工程科学研究所,南京,210098 |
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| 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.
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| 关 键 词： | 非饱和土 基质吸力 土工膜 边坡稳定 |
| 收稿时间： | 2008-06-27 |
Stability analysis of unsaturated expansive soil slope |
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| WU Jun-hua,YUAN Jun-ping,LU Ting-hao.Stability analysis of unsaturated expansive soil slope[J].Rock and Soil Mechanics,2008,29(Z1):363-367. |
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| Authors: | WU Jun-hua YUAN Jun-ping LU Ting-hao |
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| Institution: | 1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2.Geotechnical Research Institute, Hohai University, Nanjing 210098, China |
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| 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... |
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| Keywords: | unsaturated soil matric suction geo-membrane slope stability |
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