非饱和膨胀土边坡稳定性分析  

Stability analysis of unsaturated expansive soil slope

作　　者：黄润秋[1] 吴礼舟[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《地学前缘》2007年第6期129-133,共5页Earth Science Frontiers

基　　金：国家自然科学基金资助项目"雅砻江水电开发联合研究"(50539050)

摘　　要：Bishop和Fredlund的非饱和土强度公式参数不易工程应用,文中基于双曲线的非饱和土强度公式,采用简化Bishop法建立非饱和土边坡的稳定方程,分析膨胀土边坡的稳定性,讨论了吸力、分层及其边坡表层裂隙对非饱和膨胀土边坡稳定性的影响。通过分析与比较,揭示了膨胀土边坡浅层滑坡的原因。To overcome the difficulty of directly applying the shear strength equation for unsaturated soil to practical engineering, we used the simplified shear strength equation in conjunction with double-curve fitting methods to analyse the stability of unsaturated expansive soil slope, and to evaluate the effect of matrix suction, stratification and cracks on the stability of unsaturated expansive soil slope. The results of analysis and comparison help us better understand the reasons of landslides in the upper layers of expansive soil slope.

关 键 词：膨胀土边坡 非饱和土 稳定性 强度 

分 类 号：P642.116[天文地球—工程地质学]