基于数值流形方法的水库岩体边坡稳定分析

Stability Analysis for Reservoir Rock Slope Based on Numerical Manifold Method

利用数值流形方法可以模拟边坡大变形和连续—非连续变形的特点,分析了某一水库岩体边坡在库水位骤降时的变形规律,提出了利用边坡位移确定岩体滑动面内摩擦角的方法。利用传统安全系数的概念,考虑库水位骤降时的地下水渗透压力的作用,对该水库边坡的稳定性进行分析和评价。

The numerical manifold method(NMM) is a new powerful numerical method in solvingthe problems ofrock engineering.In thepaper,the methodis applied to study the deformation law of the rock slopeunder the condition of sharp drawdown of reservoir water level.Because the NMM can simulate the large-displacement of rock slide body,the limit friction angle of the joint can be found according to the different displacement along with the different strength parameters of joint.Based on the concept of safety factor,the stability of the rock slope in a reservoir is analyzed in which the groundwater seepage pressure is considered due to sudden drawdown of reservoir water level.