中国地质灾害与防治学报2023，Vol.34Issue(6)：20-29,10.DOI:10.16031/j.cnki.issn.1003-8035.202305042
甘肃灵台县南店子滑坡活动特征及成因分析
Characteristics and causes analysis of Nandianzi landslide in Lingtai County,Gansu Province
摘要
Abstract
On October 3,2021,a large landslide occurred at the loess-mudstone interface in Nandianzi,Lingtai,its successful early warning measures preventing casualties.In order to investigate the occurrence mechanism behind the Nandianzi landslide,a basic investigation was conducted,covering the topography,lithology,hydrogeological conditions,and human engineering activities related to the landslide.Based on the characteristics and differences of the crack development of the landslide,the landslide mass was divided into five blocks.The characteristics of each block were thoroughly analyzed through qualitative and quantitative analysis.The specific sliding situation of different parts of the landslide was analyzed,and further evidence was provided for the objective rationality of landslide classification and zoning,as well as the analysis of landslide mechanisms.Ultimately,it is concluded that the main causes of landslide disasters are as follows:(1)Large-scale excavation and earthwork activities at the lower and middle parts of the slope and the toe,leading to slope steepening and reduced resistance to sliding;(2)Formation of slope depressions,causing inadequate drainage and softening of the rock layer contact surface,thereby diminishing slope stability;and(3)Prolonged heavy rainfall that leads to instability and causes significant loss.While the Nandianzi landslide in Lintai county represents a successfully averted disaster,it serves as a noteworthy case study and a cautionary example for scientifically and standardizedly approaching urban construction and rural revitalization in China.This study holds significance value for monitoring,early warning,risk assessmen,and engineering treatment in comparable regions.关键词
黄土滑坡/滑移特征/成因/成功避险/群测群防Key words
loess landslide/sliding characteristics/cause/successful risk aversion/group measurement and mass prevention分类
天文与地球科学引用本文复制引用
唐家凯,吴玮江,刘韬,宿星,万朝东,张国信,安亚鹏,李祖刚..甘肃灵台县南店子滑坡活动特征及成因分析[J].中国地质灾害与防治学报,2023,34(6):20-29,10.基金项目
国家自然科学基金项目(42067066) （42067066）
甘肃省科学院应用研究与开发项目(2022JK-04) （2022JK-04）
