联合运用改进的极限平衡法和动态规划法分析边坡稳定性

Slope stability analysis using enhanced limit equilibrium method combined with dynamic programming

为了解决边坡关键滑动面全局优化处理问题,将动态规划理论引入基于有限元的改进极限平衡法。与工程上被广泛认可的一般极限平衡法比较表明,本文提出的方法可以获得更好的近似解甚至是整体最优解,关键滑动面更符合工程实际,有效地克服了传统边坡稳定分析方法的不足;与目前国内外同类方法相比具有明显的优越性,丰富了边坡稳定分析和确定关键滑动面的方法和理论。

In order to globally optimize the solution of slope critical slip surfaces, the dynamic programming （DP） optimization technique is introduced to FEM used in slope stability analysis based on limit equilibrium method. The comparison of calculation results shows that this method provides the approximate solution better than that obtained from conventional limit equilibrium methods, even a global optimal solution. It effectively overcomes the shortcomings of traditional slope stability analysis and improves the determination method for slope critical slip surfaces.