岩土力学2012，Vol.33Issue(8)：2359-2365,7.
降雨入渗条件下软岩边坡稳定性分析
Stability analysis of soft rock slope under rainfall infiltration
摘要
Abstract
Instability mode of soft rock slope in rainy condition is one of bases for slope disposal. In order to research the stability of soft rock slope under rainfall infiltration, this article put forward a new method which not only can consider the impact of seepage field on the slope stability but also can reflect the adverse effect on the slope instability caused by rock softening effect. Two-dimensional seepage numerical calculation method is used to simulate the slope pore water pressure size and the distribution of transient saturated zone area on space and time in rainy condition. Combined the seepage field calculation results with the value of physico-mechanical parameters of rock which are obtained from transient saturated zone area soften rocks test versus time, and strength reduction method is used to analysis the stability of soft rock slope under rainy infiltration condition. The research of example slope indicates that: in early rainfall period the representation of soft rock slope instability is the local layered collapsing of slope surface under rainy infiltration condition. With the growth of rainfall duration, the representation form of the instability is the combined local layered collapsing with whole sliding. After rainfall stopping, the recovery of slope negative pore water pressure has certain delayed effect for the continuous reduction of safety coefficient of soft rock slope.关键词
降雨入渗/暂态饱和区/软化效应/稳定性分析Key words
rainfall infiltration/ transient saturated zone area/ softening effect/ stability analysis分类
建筑与水利引用本文复制引用
付宏渊,曾铃,王桂尧,蒋中明,杨晴霞..降雨入渗条件下软岩边坡稳定性分析[J].岩土力学,2012,33(8):2359-2365,7.基金项目
国家自然科学基金(No.51078042) （No.51078042）
湖南省交通科技计划项目(No.2009003) （No.2009003）
西部交通科技计划项目(No.2009318000048). （No.2009318000048）
