根据Darcy定律和二次抛物线降深曲线确定了边坡含水情况下7种浸润面位置,选取浸润面位于边坡表面时的位置作为对比。选取地震波峰值加速度由0到0.2g共6个数据,组合得48组模型计算参数。采用拟静力法,结合FLAC~(3D)程序的强度折减法对边坡进行稳定性分析。结果表明:(1)边坡涉水后,滑动面由近坡面往坡内移动到浸润面附近。随着浸润面的上升,滑动面靠近坡面且保持在浸润面附近。(2)在单一地震因素作用时,边坡滑动面随峰值加速度变化不大,但在含水的情况下,滑动面随峰值加速度变大而往坡内大幅移动,边坡破坏模式由浅层破坏转变为深层破坏。(3)浸润面位置对边坡稳定性的影响较大,因此,合理的确定浸润面的位置具有重要意义。 Based on Darcy’s law and the quadratic parabolic curve, the position of the seven infiltrated surfaces in the case of slope water content is determined. The position of the infiltrated surface on the surface of the slope is taken as a comparison. Select peak seismic acceleration from 0 to 0.2g total of 6 data, a combination of 48 models to calculate the parameters. The stability analysis of the slope is carried out by using the quasi-static method combined with the strength reduction method of FLAC 3D program. The results show that: (1) After the slope wading, the sliding surface moves from the near slope to the slope near the infiltration surface. As the infiltration surface rises, the sliding surface is close to the slope surface and remains near the infiltration surface. (2) In the case of a single seismic factor, the slip surface of the slope does not change much with the peak acceleration, but in the case of water, the sliding surface with the peak acceleration becomes larger and moves toward the slope greatly, and the failure mode of the slope is destroyed by the shallow layer Transform into deep destruction. (3) The position of infiltration surface has a great influence on slope stability, so it is significant to determine the position of infiltration surface reasonably.