非饱和土中水流入渗和气体排出过程的求解

采用孔隙介质力学分析方法,把土体骨架、孔隙水和孔隙气分别作为独立的研究对象,结合孔隙水和孔隙气在气液交界面上满足的力学条件建立耦合方程,求解非饱和土中孔隙水的入渗和孔隙气体的排出过程。对标准砂进行的一维有压水流入渗试验和计算表明,孔隙气的排出过程影响孔隙水的渗流运动。数值计算与试验结果拟合较好。

Numerical Simulation of the Process of Pore Water Infiltration and Pore Gas Flow in Unsaturated Soil

The equations with coupled boundary condition on the interface, which govern the process of pressured pore water infiltration and pore gas flow in unsaturated soils, are established in this paper based on the equilibrium analysis for pore water and pore gas separately. The experiments on the water infiltration in dry sands in one-dimensional channel show the influence of pore gas flowing on the water infiltration process. The numerical solution of the process and comparison of the results between the numerical simulation and the experiment are also proposed.