中国地质灾害与防治学报2024，Vol.35Issue(4)：25-35,11.DOI:10.16031/j.cnki.issn.1003-8035.202401024
贵州晴隆红寨大型古滑坡复活变形特征及成因分析
Reactivation characteristics and genesis analysis of the large ancient landslide in Hongzhai,Qinglong County,Guizhou Province
摘要
Abstract
On September 17,2020,a landslide occurred in Hongzhai Village,Jichang Town,Qinglong County,Guizhou Province,resulting in serious damage to 134 houses and emergency evacuation of 569 people from 127 households.Investigation revealed that the Hongzhai landslide is a deep-seated large-scale landslide with a volume of approximately 6.25 ×106 m3.Although surface buildings and infrastructure were severely damaged,the overall movement distance of the landslide was extremely short.Through comprehensive analysis including terrain geomorphology,rock and soil structure and material composition analysis,assessment of hydrological changes,and disclosure of multiple slip surfaces through borehole drilling,it was concluded that the Hongzhai landslide is a resurrected ancient landslide along bedding planes.In order to analyze and study the deformation characteristics and resurrection causes of the landslide,methods including UAV aerial survey,engineering geological survey,rock and soil mass investigation,and geophysical exploration were employed to obtain detailed data on disaster development characteristics,influencing factors,and identification features of ancient landslides.The results show that the Hongzhai landslide can be divided into four zones(A,B,C,D)based on deformation and stress transfer direction,with zone B further divided into subzones B1 and B2 based on relative displacement.The deformation and resurrection of the landslide occurred under the joint effects of steep terrain,complex rock mass structures,weak engineering rock masses,and continuous surface infiltration.Various features such as the arm-chair shaped topography at the back edge of the landslide,material differences between the slide body and surrounding rock and soil masses,fault-cutting front edges,and changes in hydrological sedimentation verify the existence of the ancient landslide.关键词
红寨滑坡/古滑坡/变形分区/破坏特征/成因分析Key words
Hongzhai landslide/ancient landslide/deformation zoning/failure characteristics/cause analysis分类
天文与地球科学引用本文复制引用
党杰,杨亮,段方情,范宣梅..贵州晴隆红寨大型古滑坡复活变形特征及成因分析[J].中国地质灾害与防治学报,2024,35(4):25-35,11.基金项目
国家杰出青年科学基金项目(42125702) （42125702）
贵州省地质灾害"隐患点+风险区"精细化调查评价项目[黔财资环[2023]87号] （）
