双参数强度折减法研究中存在的问题分析

针对目前双参数强度折减法研究中的问题，在分析传统强度折减法原理的基础上，总结双参数强度折减法存在的问题。通过对强度折减本质的讨论，分析目前双参数强度折减法研究中折减路径、综合稳定性系数、结果验证三方面的问题。分析表明:基于强度储备的强度折减法，强度折减法的本质是对抗剪强度τf进行折减；双参数强度折减法对折减路径的选择上不具有普遍适用性，且改变了边坡原有抗剪强度参数；综合稳定性系数的确定缺乏理论证明，无明确的物理意义，且其结果不适用于非均质边坡；双参数强度折减法的计算偏离了边坡稳定性分析的实质，使得数值计算的结果失真。

Analyses of the existing problems in the double parameters reduction method

In view of the problems in the study of the strength reduction method based on double reduction parameters, the problems of double parameters strength reduction based on the analysis of the traditional strength reduction principle are summarized. By discussing the essence of strength reduction, three problems of reduction path, comprehensive safety factor and calculation result verification in the study of double parameters strength reduction are analyzed. The results show that for the strength reduction method based on strength reserve, the essence of strength reduction is to reduce the shear strength τ f . The choice of reduction path in double parameters strength reduction is not universally applicable, and the original shear strength parameters of the slope are changed. The determination of the comprehensive stability coefficient lacks theoretical evidence, this coefficient has no definite physical meaning, and its result is not suitable for the inhomogeneous slope. The calculation of double parameters strength reduction deviates from the essence of slope stability analysis and makes the results of numerical calculation distorted.