入渗条件下膨胀土边坡换填处治效果数值模拟研究

摘要

The dilational strain of expansive soils is one of the major problems in swelling soil distribution area to analyze the stability of swelling soil slope of rainfall infiltration, the method of ABAQUS finite element software combined with strength reduction technique is used to analyze the swelling soil slope stability with different replacing and filling earth methods considering the coupling effects between the unsaturated seepage and stress fields. The results shows that the rainfall infiltration has significant influence on the stability of swelling soil slope and stability of swelling soil slope with different replacing and filling earth methods are all enhanced. Meanwhile, the method of ABAQUS finite element software combined with strength reduc-tion technique is an effective way to analyze the complex issue of rainfall infiltration on slope stability, which can also provides a reference for the practice of engineering project.%在膨胀土分布区域, 膨胀土问题是工程中主要的工程问题之一. 为研究降雨入渗条件对膨胀土边坡稳定性的影响, 考虑非饱和渗流场和应力场的耦合作用, 采用ABAQUS大型有限元软件结合强度折减法对不同换填工况下的膨胀土边坡稳定性进行计算, 获得边坡安全系数.计算结果表明, 降雨入渗对边坡的稳定性具有明显的影响,不同换填工况均能有效提高边坡稳定性. 同时, 基于ABAQUS大型有限元软件的强度折减法对降雨入渗条件下的边坡稳定性分析结果较合理, 可以为工程实践提供参考依据.