摘要
汶川地震后泥石流长期频发,局部形成堰塞湖灾害,极大危害了当地人民生命财产及工程建设安全。本文以地震强烈影响区花红树沟泥石流为研究对象,通过遥感解译、现场调查、钻探、原位测试及室内试验等勘察方法,综合分析了泥石流孕灾环境及发育特征。在动力学计算的基础上对新发泥石流堵河危害进行了评价,并对其形成的堰塞沉积场地工程地质问题进行了分析。研究表明:花红树沟为中等易发、中型规模黏性泥石流冲沟,沟内动储量物源约16×10^(4) m^(3),最大淤积高度约2.82 m,最大堵河范围约10 m;该泥石流堰塞场地范围较大,主要工程地质问题为砂土液化。研究结果可为确保该区域居民安全及工程建设提供科学参考依据。
After the Wenchuan earthquake,the frequency of debris flows increased for a long time,resulting in the formation of local dammed lake disasters,posing great threats to lives and properties of the locals,and to construction safety.Focusing on the debris flow of Huahongshu Gully,which was strongly affected by the earthquake,the paper comprehensively analyzed the hazardous environment and development characteristics of debris flow through remote sensing interpretation,field surveys,drilling,in-situ testing,and laboratory tests.Based on dynamic calculations,the new damming hazard of debris flow was evaluated,and the geological problems of the dammed sediment deposit site were analyzed.The findings indicate that Huahongshu Gully is a moderately prone,mid-sized viscous debris flow gully,with a dynamic stock volume of about 16×10^(4) m^(3),a maximum deposition height of about 2.82 m,and a maximum damming range of about 10 m.The debris flow dammed site covers a large area,and the main geological problem is the liquefaction of sandy soil.The results of the study can provide a scientific reference basis for the safety of residents and construction activities in the area.
作者
邓睿
崔建宏
来庆勇
唐鸥玲
刘瑞芳
DENG Rui;CUI Jianhong;LAI Qingyong;TANG Ouling;LIU Ruifang(Chengdu University of Technology,Chengdu 610059,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;Safety Technology Center,National Railway Administration of the People’s Republic of China,Beijing 100160,China)
出处
《高速铁路技术》
2023年第6期26-31,共6页
High Speed Railway Technology
关键词
泥石流
灾害特征
危害评价
堰塞沉积
砂土液化
debris flow
disaster characteristics
hazard assessment
dammed sediment deposition
sand liquefaction
