贵州瓮安县高水乡筲箕湾滑坡隐患特征与成因机理研究  

STUDY ON THE CHARACTERISTICS AND MECHANISM OF SHAOJIWAN LANDSLIDE IN GAOSHUI TOWNSHIP,WENG'AN COUNTY,GUIZHOU PROVINCE

作　　者：胡屿 刘勇 HU Yu;LIU Yong(The Geo-environment Monitoring Institute of Guizhou Province,Guiyang 550081,China)

机构地区：[1]贵州省地质环境监测院,贵阳550081

出　　处：《地质灾害与环境保护》2022年第3期15-22,共8页Journal of Geological Hazards and Environment Preservation

摘　　要：2009年7月,乌江构皮滩水电站水库蓄水后,瓮安县高水乡蜂岩村筲箕湾出现滑坡隐患,坡体出现变形现象,2011年5月,坡体变形有进一步扩大的趋势,滑坡一旦发生将威胁筲箕湾9户33人生命财产安全。通过对滑坡现场进行详细的地质勘查,综合运用钻探、物探等技术手段,对滑坡隐患特征进行了详细描述,初步阐述了隐患发展的动力学过程和成因机理,对坡体的潜在危险性进行了分析。研究结果认为,滑坡源区特殊的地形条件、碎裂岩土体和不利的岩体结构面是滑坡形成的内因,水库蓄放水和降水的饱水加载和下渗软化作用是导致滑坡发生的外因。深入研究滑坡的形成过程和成灾机理,对我国西南山区存在类似条件地质灾害隐患的减灾防灾工作,具有重要的指导意义。In July 2009,after the water conservation of Goupitan Hydropower Station on Wujiang River,The deformation of Shaojiwan landslide occurred in Fengyan village,gaoshui Township,Weng'an county.In May 2011,the slope deformation had a further expansion trend.Once the landslide occurred,it would threaten the life and property safety of 33people in 9households in Shaojiwan.In this paper,through the detailed geological exploration of the landslide site,the comprehensive use of drilling,geophysical and other technical means,the characteristics of landslide hazards are described in detail,the dynamic process and genetic mechanism of the development of hazards are preliminarily elaborated,and the potential danger of the slope is analyzed.The preliminary results show that the special terrain conditions of the landslide source area,weathered and fragmented carbonated rock mass and unfavorable rock mass structural plane are the internal causes of landslide formation,and the reservoir water storage and the saturated loading and infiltration softening of heavy rainfall are the external causes of landslide.In depth study of the formation process and disaster mechanism of landslides has important guiding significance for the disaster reduction and prevention of geological hazards with similar conditions in southwest mountainous areas of China.

关 键 词：筲箕湾滑坡 库岸稳定性 地质灾害隐患 成因机理 

分 类 号：P642.22[天文地球—工程地质学]