滑坡稳定性计算传递系数超载法的修正

Correction on transmission coefficient overloading method for landslide stability calculation

对于局部条块剩余下滑力小于0的滑坡,采用传递系数超载法计算的稳定性系数会偏大。通过对各种改进传递系数法的研究,提出一种修正的简便显式算法,该方法是对多余的抗滑力进行修正,可降低计算出的稳定性系数,使计算结果更为合理。对某滑坡用不同传递系数法进行计算对比分析,结果表明,该修正方法计算出的稳定性系数比超载法小,更接近强度储备法(隐式法)的计算结果。

For the landslide with residual sliding force of partial strips lower than 0,the stability coefficient calculated by transmission coefficient overload method is too large. Through the study on various improved transmission coefficient methods,we propose a revised simple explicit algorithm,which revises the surplus antisliding forces and can reduce the calculated stability coefficient,so the calculation result can be more reasonable. Through calculation and comparison of different transmission coefficient methods to a landslide,it is concluded that the stability coefficient calculated by the suggested method is smaller than that that by overload method,which is closer to the result of strength reserve method.