库水作用下的边(滑)坡稳定性分析

水库蓄水后,将形成大量的涉水岸坡,当水位上升时,坡体中由于水的渗入,导致坡体浸水体积的增加,从而使滑面上的有效应力减少或抗滑阻力减少和部分滑带饱水后强度的降低;当水位下降时,由于坡体中浸润面下降的滞后效应,导致坡体内产生超孔隙水压力,也将对滑坡的稳定性产生影响。因此,关于库水作用下的边(滑)坡稳定性分析成为了一个重要的研究课题,就近几年针对该课题所取得的研究成果进行总结,重点研究了水位下降时坡体内浸润面位置解析解与数值解的对比分析以及根据经验概化确定浸润面位置进行稳定性分析所存在的误差。

Stability analysis of slopes under drawdown condition of reservoirs

A lot of paddle slopes will be formed after the impoundment of a reservoir.After that due to the permeation of water the inundation volume increases,and it will would lead to the decline of effective stress or sliding resistance and the strength of partial sliding zone.On the other hand,under the drawdown condition of the reservoir,the excess pore pressure will be produced for the sake of the lagged effect of the declining underground water.So the stability of the slopes will be influenced as well.The stability analysis of slopes under the drawdown condition of reservoirs is a new important subject.The achievements of this aspect in recent years were concluded,and a comparison between the analytic and the numerical solutions under the drawdown condition of reservoirs and the inaccuracy of location of phreatic surface determined by the empirical generalization stability analysis were studied.