层状岩石边坡倾倒破坏过程的数值流形方法模拟

Simulation of stratified rock slope toppling failure process by numerical manifold method

层状岩石边坡的倾倒破坏是岩石边坡失稳破坏的主要形式之一。本文利用数值流形方法对一层状岩石边坡的倾倒破坏过程进行了模拟。模拟结果表明:在不考虑块体间粘结力的情况下,块体间的摩擦角决定着岩石边坡的稳定性。随着摩擦角的增加,块体间的摩擦系数增大,岩石边坡的稳定性增强,并出现相应的滑动区、倾倒区和稳定区。模拟结果与相应的理论预测结果相吻合。

Simulation of toppling failure process of stratified rock slope is always one of the major contents in study of slope stability. In this paper, numerical manifold method, a new numerical analysis method, is used to simulate the toppling failure process of a stratified rock slope. The simulation results show that without considering the cohesion between blocks, the friction angle between blocks decides the stability of rock slope. With the increase of friction angle, the friction coefficient between blocks increases, and the stability of rock slope increases. Accordingly, the slope is divided into sliding region, toppling region and stability region. The simulation results are very in agreement with those of theoretical forecasting.