水位上升非饱和土边坡稳定性分析

Analysis on unsaturated soil slope stability in increased water level

针对渗水对黑岱沟排土场边坡稳定造成严重威胁开展研究,基于饱和-非饱和渗流理论,在考虑毛细水作用的基础上,采用FEPG软件模拟积水入渗导致边坡内部水位线上升的过程,并通过极限平衡法分析边坡安全系数随地下水位上升的变化情况。研究表明:随着地下水位缓慢上升,边坡稳定系数先减小再增大,门槛水位处边坡稳定系数最小。

Aiming at seepage causing serious threat on Heidaigou dump slope stability, on the basis of saturated-unsaturated infiltration theory and considering the effect of capillary water, this article adopts FEPG software to simulate the process of water infiltration leading to slope internal water line increasing. Through limit equilibrium method, the article analyzes the change situation of slope safety coefficient with the rise of groundwater level. The result shows that slope stability coefficient decreases and then increases with the slowly raising groundwater level, and gets a minimum value at the doorsill water level.