库水位下降时残积土边坡失稳因素的权重分析  

Weights Analysis on Instable Factors of Residual Soil Slope Under Drawdown of Reservoir Water Level

作　　者：阙云[1] 曾凡森[1] 谢秀栋[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《山东交通学院学报》2009年第3期39-43,共5页Journal of Shandong Jiaotong University

基　　金：福建省教育厅科研资助项目(JA08016);福州大学人才基金资助项目(XRC-0814)

摘　　要：以福州市典型残积土为例,基于饱和—非饱和渗流理论,分析了库水位下降条件、土质物理力学参数、边坡几何形态等8种因素与边坡稳定性的关系,采用灰色关联法分析以上因素对于边坡稳定性的敏感程度与权重。结果表明:库水位下降时,土体有效内摩擦角和有效粘聚力对边坡稳定性影响权重最大且相当;土体渗透系数是库水位下降时诱发残积土边坡失稳的重要因素;其余因素均对边坡稳定性有较大影响,权重相差不大。With typical residual soil in Fuzhou City as an example, the relationship among eight factors including condition of drawdown of reservoir water level, physical and mechanical parameters, geometric shape of slope and stability of residual soil slope are analyzed based on saturated-unsaturated flow theory. Then, the weights between instable factors and residual soil slope was studied with grey correlation method. The results show that when the water level of the reservoir decreases, among the various factors influencing slope safety, weight of effective cohesion and effective angle of internal friction are the maximum. The permeability coefficient is an important factor which induces instability of residual soil slope when the water level of the reservoir decreases. And other factors have relatively large influence on stability of residual soil slope, but weight value of these factors are close.

关 键 词：库区 残积土边坡 失稳因素 权重 

分 类 号：TV223[水利工程—水工结构工程]