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运用饱和—非饱和渗流有限元法模拟降雨条件下饱和—非饱和土质高边坡暂态渗流场的变化情况,本文对降雨边界的处理方法加以改进,使其适用于土质高边坡渗流场的计算。对砂箱模型和土质高边坡模型的计算结果表明:所提出的边界条件的改进是可行的;雨水入渗引起土壤基质吸力大量丧失,降雨初期基质吸力丧失最快;当降雨强度相对土体入渗能力较大时,基质吸力的丧失速度主要取决于土体自身的入渗能力。
Using saturated-unsaturated seepage finite element method to simulate the change of transient seepage field of saturated-unsaturated soil high slope under rainfall, this paper improves the method of treating the boundary of rainfall and makes it suitable for the seepage field of high soil slope Calculate. The calculation results of sand box model and soil high slope model show that the improvement of the boundary conditions is feasible. The rainwater infiltration causes a great loss of soil matrix suction and the fastest loss of matrix suction in the early stage of rainfall. When infiltration capacity is large, the rate of loss of matrix suction mainly depends on the infiltration capacity of soil.