降雨条件下饱和-非饱和土坡的渗流分析

运用饱和-非饱和渗流有限元法模拟降雨条件下饱和-非饱和土坡暂态渗流场的变化情况,分析了降雨强度、降雨持时以及土壤饱和渗透系数等参数对非饱和土坡基质吸力的影响。分析结果表明:雨水入渗引起土壤基质吸力的大量丧失;降雨强度对饱和渗透系数较大土坡的基质吸力变化的影响较小。

Saturated-unsaturated Seepage Analysis of Slope under Rainfall

Based on the finite element method of the saturated-unsaturated seepage, the saturated-unsaturated transient seepage field is simulated under the condition of rainfall, and the influence of rainfall intensity, rainfall duration and saturated permeability coefficient on the matric suction of the unsaturated slope is also analyzed completely. The results show that the matric suction is lose on account of the rainwater infiltration; there is no marked influence of the rainfall intensity on variation of matric suction of slope with high saturated permeability coefficient.