各向异性对土质边坡稳定性的影响  

Study on the effect of strength anisotropy on the stability of soil slopes

作　　者：张连卫[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《中国矿业》2011年第12期108-110,共3页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51009002)

摘　　要：天然土坡内摩擦角的各向异性对边坡稳定性有一定影响。本文以规则的均匀土质边坡为研究对象,采用Spencer法对边坡安全系数随内摩擦角各向异性程度的变化规律进行了计算分析。其中,内摩擦角随滑裂面方向的变化规律采用线性准则。计算结果表明:①边坡土体内摩擦角的各向异性对边坡各向异性具有一定程度的影响。对10m高的土质边坡,内摩擦角的各向异性对边坡安全系数的影响可能达到7%～10%。②内摩擦角的各向异性对临界滑裂面的位置影响较小。Anisotropy of friction angle in natural deposited soil may have significant influence on the stability of soil slopes.Stability analysis was carried on an uniform soil slope with anisotropic friction angle,in order to study on the effect of frictional anisotropy on slope stability.Spencer＇s method was used,and the variation of friction angle was assumed to be linear with the change of direction of the slip surface.It was shown that 7~10 percent of change in safety factor might achieve within a 10m-highed anisotropic soil slope.Furthermore,the results also showed that frictional anisotropy had no obvious effect on the location of critical slip surface.

关 键 词：土质边坡 稳定性 抗剪强度 各向异性 极限平衡 

分 类 号：TU43[建筑科学—岩土工程]