摘要
我国泥石流灾害广泛发育,对当地社会经济发展以及人民生命财产构成了很大的威胁。传统的泥石流调查是采用地面调查结合遥感、钻探、槽探等方法进行,依据探测要求采用行之有效的地球物理手段进行泥石流灾害调查,对查清泥石流种类、探索其成灾机理和地质灾害评价有重要意义。本文简要阐述了地质雷达的探测原理,并在此基础上探索地质雷达方法在泥石流灾害调查中的应用效果,为泥石流灾害调查提供可靠的技术手段。通过地质雷达在北京市房山区南安主沟泥石流区域的应用实例分析,最终对比探槽结果进行验证,雷达分层与探槽分层深度基本一致,表明利用地质雷达这一探测手段能够有效地进行地层划分和深度解译,确定泥石流堆积物的厚度,为泥石流灾害调查提供较准确的地质资料。
Debris flow is a common hazard in the vast land of China,posing a great threat to local social and economic development and people s lives and property.Traditional investigations to such natural hazards combine ground surveys with remote sensing,drilling,trenching and other methods.Of them,geophysical surveys,e.g.,the geological penetration radar(GPR),can play an important role in clarifying its types,exploring the mechanism of disaster,and assessing the geological hazards from such events.This paper briefly presents the principle of the GPR,then discusses the application effects of this tool in investigations of hazardous debris flow using an example of Nan an,Fangshan district,Beijing.This case analysis shows that the stratification depth from GPR measurement is largely consistent with that from trenching,implying that GPR can effectively help stratigraphic division and depth interpretation,which permits to estimate the thickness of debris flow,providing accurate geological data for investigations of debris flow hazard.
作者
马传浩
陈剑
MA Chuanhao;CHEN Jian(School of Engineering and Technology,China University of Geosciences(Beijing),Beijing100083)
出处
《地质与勘探》
CAS
CSCD
北大核心
2019年第4期1066-1072,共7页
Geology and Exploration
基金
国家重点研发计划项目(编号:2018YFC1505003)
国家自然科学基金项目(编号:41571012)联合资助
