王家包滑坡滑动面参数反分析及稳定性评价  

Back analysis of slip surface parameters of Wangjiabao landslide and evaluation on its stability

作　　者：叶兆荣[1] 徐佩华[1] 袁中凡[1] 

机构地区：[1]吉林大学建设工程学院,吉林长春130026

出　　处：《人民长江》2012年第20期43-46,共4页Yangtze River

基　　金：国家博士后基金项目(20070411147);吉林大学基本科研业务费项目(200903302)

摘　　要：以王家包滑坡为研究对象,采用参数反分析方法得出该滑坡滑动面抗剪参数指标,进而对其稳定性进行了评价。在规范法、单一剖面法的基础上,提出两剖面联立反算法,即选取与主滑面平行且距离相等的两个剖面联立反算,求解滑动面的抗剪强度指标。比较了各种反算方法的优劣,给出了两剖面联立反算法的适用条件,指出当选取的两个剖面地质条件相差较大时,可采取多剖面联立反算,藉此所得的参数指标更能反映滑坡体的实际状况。该方法为滑坡稳定分析提供了一个新途径,值得推广。Wangjiabao landslide is taken as an example,the shear strength parameters of slip surface are obtained by adopting back analysis method,and the stability of the landslide is also evaluated.Two-profile simultaneous back calculation is put forward based on standard method and a single profile back calculation,namely,two profiles paralleled with main slip surface and with same distance are selected.By comparing with various back calculations,the applicable conditions of two-profile simultaneous back calculation are given.When the geological conditions of two profiles selected are different,and the multi-profile simultaneous back calculation can be used.In addition,the obtained parameters can further reflect the actual condition of a landslide.

关 键 词：滑坡 折线形滑动面 稳定系数 位移反分析 两剖面联立 王家包滑坡 

分 类 号：P642.22[天文地球—工程地质学]