考虑岩土体力学特性自然劣化规律的双折减系数强度折减法研究.docVIP

考虑岩土体力学特性自然劣化规律的双折减系数强度折减法研究 肖瑶 邓华锋 李建林 张吟钗 王伟 方景成 三峡库区地质灾害教育部重点实验室(三峡大学) X 关注成功！ 加关注后您将方便地在 我的关注中得到本文献的被引频次变化的通知！ 新浪微博 腾讯微博 人人网 开心网 豆瓣网 网易微博 摘????要： 强度折减法为边坡稳定分析提供了较好的分析思路, 在传统的强度折减法中, 对边坡岩土体的粘聚力和内摩擦角采用相同的折减系数, 但岩土体力学参数在劣化过程中有其自然规律, 不一定是同步折减的, 也就是说同步折减的思路不一定满足岩土体参数本身的劣化规律。基于此, 本文以粘性土边坡为研究对象, 以含水率变化导致其力学参数劣化规律为例, 收集整理了大量试验资料, 分析得到了含水率变化情况下粘性土的粘聚力和内摩擦角劣化统计规律, 并基于此提出了一种考虑岩土体力学参数本质劣化规律的双折减系数强度折减法和综合安全系数计算方法。标准边坡和实例边坡的计算结果表明, 本文所提出的双折减系数强度折减法可以较好的反映边坡的实际变形稳定情况。 关键词： 强度折减法; 含水率; 劣化; 自然规律; 双折减系数; 综合安全系数; 作者简介：肖瑶 (1992—) , 女, 硕士研究生, 主要从事岩土工程方面的研究工作.E-mail:aimme0515@163.com 作者简介：邓华锋 (1979-) , 男, 教授, 博导。主要从事岩土工程方面研究。E-mail:dhf8010@ 基金：国家自然科学基金重点项目 (No ;国家自然科学基金资助项目 (No Research on strength reduction method based on double strength reduction factors and CONSIDERING natural degradation rule of soil mechanics properties XIAO Yao DENG Huafeng LI Jianlin ZHANG Yinchai WANG Wei FANG jingcheng Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University) , Ministry of Education; Abstract： Strength reduction method for slope stability analysis provides a good analytical thinking. In the traditional strength reduction method, the same reduction factor is used for the cohesion and internal friction angle of, slope rock mass, but the soil mechanics parameters in the process of degradation has its natural law, which is not always a synchronous reduction, in other words, the thinking of synchronous reduction does not always meet the degradation law of the parameters of rock and soil mass itself. Based on this, taking clay slope as the research object, the paper focused on the law of mechanics parameters degradation caused by moisture content changes. The degradation laws of the cohesion and internal friction of clay under the moisture content changing situation were analyzed by collecting a large amount of experimental data, a strength reduction method based on double strength reduction factors and considering nat