中文摘要：

应用图论将堆积体滑坡稳定性分析中最危险滑动面搜索及安全系数计算问题转化为数学领域求最短路径问题。对动态规划算法进行改进,建立基于改进动态规划算法的极限平衡有限元方法,给出该方法的基本方程和路径上应力计算过程,避免引入辅助函数需给定初始安全系数进行迭代计算的缺陷。将该方法应用于溪洛渡左岸谷肩堆积体的稳定性分析,基于滑坡产生、发展、蠕变条件对其稳定性进行判断,对该堆积体的变形破坏机制进行分析和滑面形成条件探讨;借助监测资料揭示的滑面分布,验证改进动态规划算法搜索滑面位置与计算安全系数的准确性;在此基础上提出基于滑坡征兆的堆积体滑坡稳定性分析技术路线,可用于复杂滑坡堆积体边坡的稳定性分析。

英文摘要：

Based on graph theory,investigation of the most dangerous sliding surface and safety coefficient calculation in slope stability analysis is transformed into solution of shortest path problem in mathematics.The dynamic programming algorithm is improved to build a limit equilibrium finite element method（FEM）,in which the basic equation is given and the stress along the sliding surface is computed so as to avoid the computing iterative procedure because of given safety coefficient when auxiliary function is introduced.Then the improved method is applied to analyze the stability of landslide deposit at left bank,Xiluodu hydropower station.The safety coefficient is estimated based on the fracture appearance,landslide development and creep deformation under nature condition,then the deformation and failure mechanism is studied.According to monitoring data of hole with clinometer.The sliding surface of limit equilibrium finite element method is compared with reality,so the accuracy of this improved method is verified and stability under rainfall condition is discussed.At last,a analysis procedure is put forward based on limit equilibrium FEM,which is proved more suitable for stability analysis of deposit landslides.