摘要
受持续降雨影响,发育在侏罗系益门组泥岩河底组滑坡发生变形,威胁滑坡体后缘居民生命财产安全。通过详细调查滑坡区的水文地质与工程地质条件,分析该滑坡影响因素、变形特征及演化历史,采用简化毕肖普法对滑坡在天然、暴雨、地震3种工况下的稳定性进行了分析:滑坡演化历史分为初发阶段—坡体失稳阶段—坡体变形阶段—蠕动变形阶段。计算结果显示:在天然工况下处于稳定状态;暴雨工况下处于不稳定状态;地震工况下处于极限平衡状态。与现场情况较吻合,计算结果为后续防治工作提供参考。
Affected by continuous rainfall,mudstone landslide developed in the Jurassic Yimen Formation deformed,which threatened the life and property safety of the residents at the rear edge of the landslide.Based on the detailed investigation of hydrogeology and engineering geology conditions in the landslide area,the influencing factors,deformation characteristics and evolution history of the landslide were analyzed,and the stability of the landslide under natural,rainstorm and earthquake conditions were analyzed by simplified Bishop method.The results show that the evolution history of the landslide was divided into initial stage-slope instability stage-slope deformation stage-creep deformation stage.The calculation result display that it is stable under natural conditions.It is in an unstable state under rainstorm condition.It is in the limit equilibrium state under seismic conditions.It is in good agreement with the field situation,and the calculated results can provide reference for the follow-up prevention and control work.
作者
张杰
曹永贵
计杨
曹亚廷
李鸿波
ZHANG Jie;Cao Yonggui;JI Yang;CAO Yating;LI Hongbo(Military-civilian Integration Geological Survey Center,China Geological Survey,Chengdu 610036)
出处
《四川地质学报》
2023年第4期702-707,共6页
Acta Geologica Sichuan
基金
中国地质调查局项目(DD20160080)资助。
关键词
滑坡
地质特征
变形特征
简化毕肖普法
攀枝花仁和区
landslide
geological features
deformation characteristics
Simplified Bishop method
Renhe District in Panzhihua
