降雨作用下煤系土路堑边坡稳定分析

基于掌握的降雨气象资料，利用非饱和瞬态渗流有限元程序对开挖后和风化后两种情况下的煤系土路堑边坡进行了降雨入渗坡体渗流场数值计算和分析。依据非饱和土力学强度理论，基于Morgenstern-Price方法，调用不同降雨时间的渗流计算结果，对两种情况下煤系土路堑边坡的瞬态稳定性进行了计算和分析。研究结果表明，水分在风化煤系土路堑边坡体内的渗透迁移对路堑边坡稳定性和最危险滑动面有时空影响；在煤系土路堑边坡降雨入渗和稳定性分析中考虑风化层较为合理。

Stability analysis of coal measure soil slope under rainfall infiltration

With the FEM program of transient unsaturated seepage calculation, the seepage field of coal measure soil slope after excavating and weathering affected by the infiltration process of rainfall is simulated and analyzed according to the monitor ed daily rainfall data in July. Then, based on Morgenstern-Price method, the transient safety factor of coal measure soil slope is computed and analyzed by means of unsaturated soil strength theory and calling seepage results at different rainfall times. The results obtained show that the dangerous slip surface of the slope and its relative safety factor is affected and vibrated with water in different parts of the slope, meanwhile; rainfall infiltration and stability analysis considering weathered layer is more reasonable in coal measure soil slope.