基于极限平衡有限元的岩质高边坡安全系数长期预测分析

引入基于Dijkstra算法的极限平衡有限元方法到岩质边坡长期稳定性研究中，得到边坡长期安全系数,并将该方法应用于糯扎渡工程坝肩高边坡，在弹塑性下比较刚体极限平衡和基于Dijkstra极限平衡有限元方法计算结果，认为该算法可信。基于糯扎渡水电站坝肩高边坡有限元流变分析中各时步应力场结果，采用基于Dijkstra极限平衡有限元方法得到各时步潜在滑动面和安全系数。由此判定该边坡长期稳定性，并给出安全系数随时间变化趋势和长期安全系数。

Long-term prediction of safety factor of high rock-slope based on limit equilibrium finite element method

The FEM of limiting equilibrium based on Dijkstra algorithm is introduced to the research the long-term stability of rock-slope, and to get the long-term safety factor of the slope. And this method is applied to research the stability of the abutment high-slope at Nuozhadu Hydropower Station. Comparisons between the result by limiting equilibrium method and the result by the FEM of limiting equilibrium method in the elastic-plastic condition, show that this method is credible. The latent sliding surfaces and the safety factor of several time steps are obtained by the FEM of limiting equilibrium method based on Dijkstra algorithm. All of these are based on the stress field of corresponding time steps from visco-elastoplastic FEM result of the abutment high-slope of Nuozhadu Hydropower Station. The stability of the slope is estimated from the above result. And the curve of safety factor vs. time, and long-term safety factor of the slope are also given.