以上田滑坡体A区中线为计算剖面,基于二维饱和—非饱和渗流有限元方法,分析了滑坡在泄洪雾化状态下的渗流场,获得在6 000m3/s泄洪强度下压力水头及地下水位变化情况。结果表明,随着降雨持时的增加,压力水头随深度呈近直线变化趋势;降雨渗水在一定土层条件下使地下水渗流产生“瓶颈”效应,形成对边坡稳定不利的暂态饱和区;地下水位总体呈现从坡脚和中部部位同时提升的现象;暂态饱和区使安全系数明显降低,但滑坡稳定性良好,不存在失稳风险。 Based on the two-dimensional saturated-unsaturated seepage finite element method, the mid-line of the above A-zone of the landslide body is calculated and the seepage field of the landslide is analyzed under the condition of atomization of the flood discharge so as to obtain the pressure head and groundwater level under the flood releasing intensity of 6 000 m 3 / s Changes. The results show that with the increase of rainfall holding time, the pressure head changes nearly linearly with the depth. Under some soil conditions, rainfall seepage causes “bottleneck” effect on groundwater seepage and forms transient negative saturation In the transient saturated zone, the safety factor is significantly reduced, but the landslide stability is good, and there is no risk of destabilization.