土质堤防边坡稳定安全系数影响因素研究  

Analysis of Safety Coefficient Influencing Factors for Soil Embankment Slope Stability

作　　者：黄勇博[1] 孙树林[2,1] 周宏博[1] 

机构地区：[1]河海大学地球科学与工程学院,南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,南京210098

出　　处：《科学技术与工程》2012年第11期2607-2611,共5页Science Technology and Engineering

基　　金：留学回国人员科研基金项目(20071108);江苏省环境保护厅项目(201029)资助

摘　　要：坡体内外水的作用,会改变影响边坡稳定性安全系数的因素。借助Geo-Studio Slope/W和Seep/W软件模块,建立均质土堤防边坡模型。选择不同的坡角、内摩擦角、黏聚力、坡顶荷载、水位及土体渗透性等参数,研究在内外初始水作用下堤防边坡稳定安全系数的变化规律。结果表明:内摩擦角、黏聚力、坡顶荷载对堤防边坡安全系数影响明显:水位骤变方式不同,坡体内侵润线变化规律明显不同,对安全系数的影响也有差异。土体的渗透系数,尤其是渗透系数各向异性对安全系数的影响特别显著。The internal and external water of slope can change the factors,which influence the safety coefficient of slope stability.Based on software module of Geo-Studio Slope/W and Seep/W,a model of homogeneous soil embankment slope,and selects different parameters like slope angel,internal friction angel,cohesive strength,slope top load,water level,and soil permeability,etc.,analysis the variation rule of the embankment slope safety factors with the impact of initial internal and external water is proposed.The result indicated：（1） Internal friction angel,cohesive strength and slope top load have obvious influence on slope safety coefficient;（2） Slope safety coefficient ranges due to sudden change of water level,as well as different variation rules of phreatic line;（3） Soil permeability,especially anisotropic permeability has prominent effect on the safety coefficient of slope stability.

关 键 词：堤防 边坡稳定性 渗透系数 水位骤变 各向异性 

分 类 号：U417.2[交通运输工程—道路与铁道工程] TU413.2[建筑科学—岩土工程]