基于非饱和渗流的有限元强度折减法边坡稳定性分析

Slope Stability Analysis Based on Strength Reduction Finite Element Method of Unsaturated Seepage

以金安桥水电站枢纽区库岸B1堆积体边坡为研究对象,基于非饱和非稳定渗流理论及有限元强度折减法理论,考虑非饱和非稳定渗流对边坡稳定性的影响,采用有限元强度折减法和刚体极限平衡法,计算B1堆积体在天然和库水位骤降工况下的稳定安全系数,对B1堆积体边坡的稳定性进行评价,并提出了边坡处治措施。

This paper takes the B1 deposit slope on reservoir bank of Jin An Qiao hydropower hub division as research object.Based on the unsaturated and unstable seepage theory and strength reduction finite element theory the unsaturated and unstable seepage impact on slope stability is considered.The finite element strength reduction and rigid body limit equilibrium method are adopted for calculating the stable safety coefficient of B1 deposit under the suddenly falling conditions of natural and reservoir＇s water level.Finally the stability of B1 deposit slope is evaluated and the slope treatment measures are put forward.