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针对传统的强度折减法未考虑到边坡破坏过程中粘聚力和内摩擦角衰减速度的差异及边坡所有单元的强度参数均折减的问题,对边坡材料强度参数粘聚力和内摩擦角分别采用不同的折减系数,并根据屈服接近度判别标准,逐步调整折减区域,提出了边坡稳定分析的双安全系数动态局部强度折减法。实例应用结果表明,该方法能够较好地反映边坡破坏过程中粘聚力和内摩擦角衰减速度的差别,可模拟边坡失稳演变过程,得到的安全系数一般小于传统强度折减法和动态局部强度折减法。
In view of the fact that the conventional strength reduction method does not consider the difference of the decay rate of cohesion and internal friction angle during slope failure and the reduction of the strength parameters of all the units in the slope, According to the criterion of yield proximity, the reduced area was adjusted step by step, and the dynamic local strength reduction method with double safety factor was proposed for slope stability analysis. The results of practical application show that this method can well reflect the difference of the decay rate of cohesion and internal friction angle during the process of slope failure, and can simulate the process of slope instability evolution. The safety factor obtained is generally smaller than the traditional strength reduction method and dynamic Local strength reduction method.