摘要
淹土安滑坡位于陕西省延安市甘泉县城关镇瓦窑沟,2013年7月延安地区发生极端强降雨,导致滑坡前部蠕动变形,滑坡体出现数条横向拉张裂缝,滑坡有复活迹象。为了减灾防灾和分析研究滑坡变形特征、变形力学机制,2013年10月16日开始对滑坡进行实时监测。2014年5月14日滑坡变形加剧,并及时预警预报,受威胁人员全部安全撤离。5月15日滑坡前部滑塌,方量约200m^3,避免了人员伤亡。根据监测结果,滑坡变形过程可分为初始变形、加速变形、变形破坏和减速变形4个阶段。降雨是滑坡变形失稳的主要诱发因素,坡脚开挖和冻融作用对滑坡变形失稳也有重要影响。
Yantu＇an landslide is located in Wayaogou area,Chengguan Town,Ganquan County,Yan＇an City,Shaanxi Province.The front edge of the Yantu＇an landslide creep deformation was caused by extreme heavy rainfall in July 2013 in Yan＇an.The landslide develops several transverse tension cracks in front edge,which shows signs of revival.In order to carry on the disaster reduction and disaster prevention,as well as the analysis of landslide deformation characteristics and deformation mechanics mechanism,a real-time monitoring system of the Yantu＇an landslide has been carried out on October 16,2013.On May 14,2014,this landslide became more deformed,the timely warning and forecasting have been carried out,and all the threatened personnel has been evacuated safely.On May 15,the front of the landslide slipped to about 200 m^3.The people＇s life has been protected because of the successful early warning and timely evacuation.Deformation process of this landslide has been divided into four stages by monitoring results：initial deformation stage,accelerative deformation stage,unstable deformation stage and decelerating deformation stage.Rainfall is the main inducing factor of this landslide deformation instability.In addition,the excavation and freeze-thaw action of slope foot also have an importantinfluence on landslide deformation and instability.
作者
薛强
张茂省
XUE Qiang;ZHANG Maosheng(Xi an Center of Geological Survey, China Geology Survey, Xi an 710054, Shaanxi, China)
出处
《西北地质》
CAS
CSCD
北大核心
2018年第2期220-226,共7页
Northwestern Geology
基金
国家自然科学基金重点项目"黄土水敏性的力学机制及致滑机理"(41530640)
中国地质调查局地质调查项目"延安市地质灾害监测预警"(1212011140018)
国土资源部黄土崩滑灾害-陕西延安野外科学观测研究基地联合资助
关键词
淹土安滑坡
监测预警
变形特征
影响因素
Yantu an landslide；monitoring and early warning；deformation characteristics；influencing factors
