强度折减法在三维有限元边坡稳定分析中的应用

为研究强度折减法在边坡三维稳定分析中的适用性,选择已知滑裂面和未知滑裂面共4个经典算例,运用强度折减法求解其安全系数,并与既有的极限平衡法结果进行对比。计算结果表明,数值解与既有的极限平衡法解析解非常接近,模拟的滑动方向与理论假定亦基本一致。由此证明了强度折减法在三维有限元边坡稳定性分析中的适用价值,为解决工程计算问题提供了参考。

Application of Strength Reduction Method in Three-dimensional Finite Element Analysis of Slope Stability

In order to analyze the feasibility of the strength reduction method (SRM) in three-dimensional slope stability, the safety factors of four slip surfaces including the known or unknown slide surfaces are calculated by the SRM. Compared with the existing solutions by the ultimate equilibrium method, the numerical solution is proved to be very close to the analytic solutions given by the ultimate equilibrium method. The simulated sliding direction is also in accord with the hypothetical one. The application value of strength reduction method in three-dimensional finite element analysis of slope stability is proved, which provides reference for solving engineering calculation problems.