在边坡抗滑稳定性分析中,特别是用有效应力法分析时,坡内渗流零压线位置的变化对滑动和抗滑力矩都有影响。过去,工程上往往按所谓“突降”来考虑,即把外水位升降过程视为瞬时完成,坡内渗流状态保持外水位变化前不变,但事实上一切变化均需要时间。因此需要考虑一个不稳定渗流过程。 In the slope stability analysis, especially the effective stress method, the change of position of the zero pressure line in the slope affects the sliding and anti-sliding torque. In the past, engineering was often considered as a so-called “dumping”, ie, the external water level rise and fall process was regarded as an instantaneous completion, and the seepage state in the slope remained unchanged until the change of the external water level, but in fact, all changes took time. Therefore, it is necessary to consider an unstable percolation process.