饱和-非饱和渗流下膨胀土坡稳定性评估的有限元法  

FEM for Stability Assessment of Expansive Soil Slope under Saturated-unsaturated Seepage

作　　者：韦立德 黄威 陈从新 

机构地区：[1]中科院武汉岩土力学研究所岩土力学与工程国家重点实验室

出　　处：《水利与建筑工程学报》2010年第4期21-23,36,共4页Journal of Water Resources and Architectural Engineering

基　　金：中国科学院武汉岩土力学研究所博士科研启动基金资助项目(O721031Q01);水沙科学与水灾害防治湖南省重点实验室开放基金项目(2008SS03);国家自然科学基金项目(50809069)

摘　　要：总结了膨胀土坡饱和-非饱和渗流场中影响边坡稳定性的一些因素,建议了饱和-非饱和渗流下考虑强度降低、密度变化等稳定性影响因素的膨胀土坡稳定性评估三维强度折减有限元方法,研制相应的强度折减有限元程序。通过与传统极限平衡法分析结果对比研究,对抗剪强度折减有限元法分析边坡稳定问题的适用性进行了评价,得出采用三维强度折减有限元法确定考虑饱和-非饱和渗流场的膨胀土边坡稳定性安全系数是可行的结论。The factors which affect the slope stability of expansive soil under saturatedunsaturated seepage are studied here,the FEM for stability assessment of expansive soil slope under saturated-unsaturated seepage is suggested considering the strength reduction,and so on,and the corresponding program for the 3D finite element method（FEM） is developed.Through comparison with the FEM calculation with limit equilibrium,the applicability of the FEM for analysis of the expansive soil slope stability is evaluated.The comparison results show that the FEM is feasible to analyze the stability of the expansive soil slope under saturated-unsaturated seepage.

关 键 词：膨胀土 边坡稳定性 饱和-非饱和渗流 强度降低 弹塑性有限元 

分 类 号：TV139.14[水利工程—水力学及河流动力学]