摘要
选取石渠县G215线上某滑坡点作为研究对象。基于详细地勘资料,定性分析堆积体滑坡的孕育过程与地层岩性、地形条件、气候、地震、降雨等诸多因素的关系;同时提取出主滑面典型地质剖面,以公路为界,将边坡分为上、下边坡两个区域,对边坡进行定量稳定性评价。计算结果显示路线左侧上边坡、右侧下边坡的现状分别为欠稳定、基本稳定状态,在降雨等外部因素影响下分别为不稳定、欠稳定状态。综合结果表明强降雨是诱发堆积体滑动变形的主要原因。
A landslide on the G215road,located in Shiqu County,Sichuan Provinces is selected as the research area.Based on detailed geological prospecting data,the relationships between the deformation mechanism of landslides with the lithology,terrain conditions,climate,earthquake,rainfall and other factors are qualitatively analyzed.At the same time,the typical geological section of the main sliding surface,which is divided into the upper and lower sections,is extracted to quantitatively analyze stability of the landslide.The stability calculation results shows that the current states of the upper slope on the G215road’s left side is under-stable,and the lower slope on the G215road’s right side is basically stable;under the influence of external factors such as rainfall,the upper and lower slope will respectively be unstable and under-stable states.The comprehensive result shows that heavy rainfall is the main cause of deformation of accumulation soil landslide.
作者
张秋霞
文丽娜
朱崇林
林世伟
ZHANG Qiu-xia;WEN Li-na;ZHU Chong-lin;LIN Shi-wei(Sichuan Highway Engineering Supervision Co.,Ltd,Chengdu 610041,China;Sichuan Highway Planning,Survey,Design And Research Institute Co.,Ltd,Chengdu 610041,China)
出处
《地质灾害与环境保护》
2022年第3期3-9,共7页
Journal of Geological Hazards and Environment Preservation
基金
四川省科技厅重点研发项目(项目编号:2020YFS0361)。
关键词
堆积体滑坡
成因机理
强降雨
稳定性分析
accumulation soil landslide
formation mechanism
heavy rainfall
stability analysis
