基于强度折减法的土质边坡稳定性影响因素分析  

An Analysis on Factors Influencing Stability of Soil Slope by Strength Reduction Method

作　　者：李志佳[1] 张顶立[2] 房倩[2] 李淑[2] 

机构地区：[1]北京市市政工程设计研究总院,北京100082 [2]北京交通大学隧道及地下工程教育部工程研究中心,北京100044

出　　处：《隧道建设》2013年第10期854-859,共6页Tunnel Construction

基　　金：国家重点基础研究发展计划(973计划)(2010CB732100)

摘　　要：为探讨不同因素对土质边坡稳定性的影响,根据北京地区典型地层的物理、力学参数,使用强度折减法对其进行研究,并采用灰色关联度理论对各个影响因素的敏感性进行分析,研究的影响因素包括边坡角度、边坡高度、土体黏聚力、内摩擦角、容重、弹性模量、泊松比和坡后荷载等。主要研究结论如下:在各种影响因素中,土体的强度参数黏聚力和内摩擦角对边坡稳定性影响显著,其次是边坡的几何参数坡高和坡角,再次是土体的容重和坡后荷载,而弹性模量和泊松比对边坡稳定性无影响。Factors influencing the stabilitv of soil slopes are analyzed by means of strength reduction method,based on the physical and mechanical parameters of typical strata in Beijing.The sensitivity of the influencing factors are analyzed by means of grey correlation degree theory.The influencing factors studied include the angle and height of the slope,the cohesion,internal friction angle,specific weight,elastic modulus and Poisson ratio of the soil and the load behind the slope.Conclusions drawn are as follows：1） The strength parameters of the soil mass,i.e.,the cohesion and the internal friction angle,have the most decisive effect on the soil slope stability; 2） The geometrical parameters of the slope,i.e.,the height and angle of the slope are in the second position; 3） The specific weight of the soil mass and the load behind the slope are in the third position; and 4） The elastic modulus and Poisson ratio have no effect on the stability of the soil slope.

关 键 词：土质边坡 稳定性 强度折减法 灰色关联度 

分 类 号：U45[建筑科学—桥梁与隧道工程]