沿河路堤饱和非饱和渗流数值模拟分析

Saturated-Unsaturated Seepage Numerical Simulation on the Highway along Rivers

采用多孔介质预测渗透系数的方法,研究了基于体积含水量和基质吸力的非饱和渗透系数分析方法。基于饱和非饱和渗流数学模型,采用有限元分析了季节性水位变化下饱和-非饱和非稳定渗流特点,揭示了沿河路堤内的渗流特征及规律,结论表明:浸润线和孔压在迎水面坡体内变化明显,浸润线和孔压的变化滞后于水位变化,会影响边坡的稳定。

Based on the method for predicting permeability coefficient of porous media, the unsaturated permeability coefficient regarding volume moisture content and matrix suction as variable was studied. The saturatedunsaturated seepage equation was developed. The rule of saturated-unsaturated seepage was numerically analyzed during the variation of river water level. The results demonstrate that the infiltrating line and pore pressure change obviously in the upstream batter of highway,and the changes lag behind the river water level change,it will affect the slope stability.