摘要
开县安坪滑坡属于土质滑坡,根据地表变形情况、斜坡坡向、基岩面倾向,再结合滑床形态,将滑坡划分为H1滑坡和H2滑坡。近年来,每年雨季滑坡体受降雨影响,坡体上滑塌变形,区内学校、居民房屋变形严重,对居民的生命财产安全已构成严重威胁。基于安坪滑坡体特征及宏观分析,使用极限平衡理论中的传递系数法对安坪滑坡H1区和H2区整体及H1区局部的稳定性进行定量计算。并通过地质勘察结果对计算参数进行取值,计算滑坡的稳定性系数Fs。结果表明:安坪滑坡整体处于稳定状态;H1区局部的1号次级剪出口在工况2稳定系数为1.098,处于基本稳定状态,应做敏感性分析。对滑坡稳定性进行敏感性分析发现:c、φ值均与稳定性系数之间存在明显的线性关系;通过定量比较分析可得φ值较c值对滑稳定系数影响更大,能为滑坡的治理和监测提供重要的指导意义。
The Anping landslide in Kaixian County is a soil landslide. Based on surface deformation status, slope orientation, bedrock dip, then combined with slide bed form repartitioned the landslide into H1 and H2 two parts. In recent years, impacting from rainfall during rainy season each year, slide body sliding deformation made nearby school and folk houses seriously deformed, constituted grave threat on residents’safety of life and property. Based on Anping landslide mass features and macroscopic analysis, using transmitting coefficient method in limit equilibrium theory have carried out stability quantitative computation on integers of H 1, and H2 and local part of H1. Through geological exploration data carried out computation parameters value taking, to compute landslide stability coeffi？cient Fs. The result has shown that the Anping landslide integer is in a steady state;H1 local part No.1 sublevel shear crack stability co？efficient under working condition 2 is 1.098, thus in basically stable state, should be sensibility analyzed. After landslide stability sensi？bility analysis has found that between the c, φ values and stability coefficient exist obvious linear relationship. Through quantitative comparative analysis can find that in comparison to c value, the φvalue has greater impact on landslide stability coefficient, can pro？vide important guidance on landslide controlling and monitoring.
出处
《中国煤炭地质》
2015年第11期43-47,78,共6页
Coal Geology of China
关键词
安坪滑坡
极限平衡理论
稳定性系数
敏感性分析
Anping landslide
limit equilibrium theory
stability coefficient
sensibility analysis
