降雨入渗时无限边坡的水平位移与稳定性分析

采用Mohr-Coulomb强度理论，对下有不透水层的无限边坡进行了弹塑性分析，探讨了降雨过程中坡面水平位移的变化规律，分析了边坡安全系数和滑坡前坡面水平位移的关系。数值分析表明，土坡的抗剪强度参数、初始应力状态和降雨强度对边坡的安全系数和水平位移都有很大影响，但初始应力状态对滑坡发生的时间没有影响，对于具有较小抗剪强度参数的边坡，如果降雨强度较大，则滑坡时的水平位移较小。

Horizontal displacements and stability analysis of infinite slopes under rainfall infiltration

An analysis is made of the horizontal displacements that take place in an infinite slope, consisting of an elastic-plastic Mohr-Coulomb material and overlying an impermeable substrate, due to the rainfall infiltration. An attempt is made to establish a relationship between the horizontal displacements before failure and the slope safety factor. It is shown that the slope safety factor and the horizontal displacements are significantly influenced by the initial stress state, the parameters of shear strength of soil and the rain intensity, while the time of slope sliding failure is not done by the initial state of stress. And it is also shown that the less horizontal displacements before failure takes place in the slope consisting of the soil with less parameters of shear strength under the greater rainfall infiltration.