滑坡稳定性评价中传递系数法的适用范围研究  

On Application Scope of Transfer Coefficient Method in Evaluation of Landslide Stability

作　　者：陆荣林 魏来[2] 罗刚[2] 吴京涛[2] 成昊坤 

机构地区：[1]建材成都地质工程勘察院,成都610052 [2]西南交通大学地球科学与环境工程学院,成都610031 [3]西南交通大学抗震工程技术四川省重点实验室,成都610031

出　　处：《路基工程》2016年第4期17-22,共6页Subgrade Engineering

基　　金：国家自然科学基金(41402266);中央高校基本业务费科技创新项目(2682015CX011);中央高校基本科研业务费科技创新项目(SWJTU12CX037)

摘　　要：传递系数法是规范中用来计算滑坡稳定性系数和滑坡推力的一种通用有效的方法,然而在使用该法时仍存在较多问题。基于此,首先从该法的基本假设出发总结了其优缺点和适用范围,其次解析了该法的两类衍生解法(强度储备法和超载法)中的计算要点和取值范围,并阐述了稳定性系数和安全系数的区别。最后介绍了滑动面抗剪强度指标与滑坡宏观变形之间的联系,分析了分块条数对稳定性系数的影响,以及渗透压力计算公式的选取,得出具体工程中,应以不同的分块条数分别进行计算对比选取的结论。Transfer coefficient method is a commonly-used method to calculate landslide stability factor and landslide thrust in the standards, however, there exist many problems yet. Therefore, this paper firstly based on the basic assumptions of the method, summarized its advantages and disadvantages and the scope of application; secondly analyzed the key points of calculation and the range of values in its two derivative resolutions （strength reserve method and over-loading method）, and described the difference between the stability factor and the safety factor ; at last, introduced the relation between the shear strength of slide surface and the macroscopic deformation of landslide, and analyzed both the effect of slicing on the stability factor and the selection of calculation formula for seepage pressure. As a result, it is concluded that, in specific project, the number of slices shall be based on to carry out the related calculation, comparison and selection.

关 键 词：滑坡稳定性 传递系数法 强度储备法 超载法 适用范围 计算要点 

分 类 号：U416.163[交通运输工程—道路与铁道工程]