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中文摘要：
当水通过浸透的土壤层向上渗出时，土壤层可以成为不稳定性，水电影发生并且发展。因为它的很小的磨擦，水电影用作自然滑动表面。因此，碎片流动可以发生。调查这现象， pseudo-three-phase 媒介首先被介绍。然后，断绝方法被用来分析水电影的扩大速度。最后，当骨骼的运动可以相对水的被忽视时，不安方法被用来分析水流动被强迫通过土壤层向上渗出的案例。毛孔压力坡度，有效压力，水速度，孔和侵蚀的好谷物的理论进化被获得。这能清楚地被看见与侵蚀并且好谷物重新扔，在在土壤层的一些位置的渗透变得越来越小并且，毛孔压力坡度变得越来越大，当有效压力变得越来越小时。当有效压力等于零时， e.f 液化，水电影发生。一旦一部水电影发生，它将处于(U)(t)/ 的速度被扩展，这也被显示出(1 吗？?) 。
英文摘要：
When water seeps upwards through a saturated soil layer,the soil layer may become instability and water films occur and develop.Water film serves as a natural sliding surface because of its very small friction.Accordingly,debris flow may happen.To investigate this phenomenon,a pseudothree-phase media is presented first.Then discontinuity method is used to analyze the expansion velocity of water film.Finally,perturbation method is used to analyze the case that a water flow is forced to seep upwards through the soil layer while the movement of the skeleton may be neglected relative to that of water.The theoretical evolutions of pore pressure gradient,effective stress,water velocity,the porosity and the eroded fine grains are obtained.It can be seen clearly that with the erosion and redeposited of fine grains,permeability at some positions in the soil layer becomes smaller and smaller and,the pore pressure gradient becomes bigger and bigger,while the effective stress becomes smaller and smaller.When the effective stress equals zero,e.f.liquefaction,the water film occurs.It is shown also that once a water film occurs,it will be expanded in a speed of U（t）（1-ε）.
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