反向次生成层结构边坡稳定性影响因素的定量分析  

Quantitative analysis of influential factors for the stability of obsequent secondary layered structure slopes

作　　者：刘云鹏 邓辉[2] 陈卫东 

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,成都610072 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《桂林理工大学学报》2017年第3期466-474,共9页Journal of Guilin University of Technology

基　　金：中国电建集团成都勘测设计研究院科技项目(PC004-2014)

摘　　要：岩体结构类型直接影响边坡的失稳机制,而不同类型结构对坡体稳定性的影响也表现出不同的特点,因此,基于岩体结构特点进行的边坡稳定性影响因素分析便成为了工程边坡设计及深入评价和预测边坡发展变化趋势的重要基础工作。针对工程边坡中出现的反向次生成层结构边坡,根据其特点和工程经验,选取影响这类边坡稳定性的6个重要因素,通过参数取值正交试验,并采用UDEC软件对其进行数值模拟,获得各影响因素对边坡变形破坏影响程度的量化结果。结果表明:6个因素对反向次生成层结构边坡不同稳定性指标影响的主次顺序各不相同,总体而言,岩石强度、坡高和坡角是影响整体稳定性的首要因素;边坡稳定性系数、次生成层最大张开程度及坡顶最大位移在单一因素变化下分别表现出不一样的响应特征。Rock structure type directly affects the stability mechanism of the slope.Different types of structures on the slope stability also show different characteristics.Therefore,the analysis of influence factors of slope stability,according to the characteristics of rock mass structure,becomes an important work for the engineering slope design and in-depth evaluation and prediction of slope development trend.For obsequent secondary layered structure slope in the engineering slopes,the six important factors were selected according to the characteristics of obsequent secondary layered structure slope and the engineering experience.The quantitative results of these factors on the slope deformation and destruction were obtained through the orthogonal test of parameter selection and the numerical simulation software UDEC.The results show that the influence order of the six factors on different stability indexes of the obsequent secondary layered structure slope is different.In general,the rock strength,slope height and slope angle are the primary factors.When other factors are unchanged,only one factor changes,in the slope stability coefficient and secondary layer maximum open degree,the maximum displacement of slope will show different response characteristics.

关 键 词：反向边坡 次生成层结构 倾倒变形 稳定性影响因素 正交试验 

分 类 号：TU45[建筑科学—岩土工程]