降雨条件下岩土饱和-非饱和渗流分析

Satirated-unsaturated Seepage Analysis in Rock and Soll Media Under Raining and Percolation

基于 Buckley-Leverett 两相渗流方程,提出了新的岩土饱和-非饱和渗流数学模型,利用有限差分方法给出了隐式压力显示饱和度数值求解方法,编制了饱和-非饱和渗流计算程序。结合工程实例,模拟了降雨入渗条件下边坡岩体渗流场孔隙压力变化和含水饱和度变化,模拟结果验证了所提出的模型对饱和-非饱和渗流的有效性。

A new mathematical model for saturated-unsaturated seepage in rock and soil media was given based on two-phase seepage theory. Using implicit pressure and explicit saturation solving method, a numerical procedure for finite difference method to saturated-unsaturated seepage problem is presented. Seepage process in a slope under raining condition was simulated using the new model, pore pressure and water saturation changes were simulated. The calculation case shows that the results obtained by the model are reasonable for saturated- unsaturated seepage problem.