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。 Using the method of mechanical analysis of pore medium, the soil skeleton, pore water and pore gas are taken as independent research objects respectively. The coupling equations are established based on the mechanical conditions that the pore water and pore gas meet at the gas-liquid interface, and the pore space in unsaturated soil Water infiltration and pore gas discharge process. One-dimensional pressurized water infiltration tests and calculations on standard sand show that the discharge of pore gas affects the seepage motion of pore water. Numerical calculation and test results fit better.