Application of geophysical methods in fine detection of urban concealed karst:A case study of Wuhan City,China  

作　　者：Dao-han Liu Lei Wang Lei Liu Jun-jie Xu Jian-qiang Wu Pan Liu 

机构地区：[1]Wuhan Center,China Geological Survey,Wuhan,430205,China [2]Central South China Center for Geoscience Innovation,Wuhan,430205,China [3]Geophysical Exploration Brigade of Hubei Geological Bureau,Wuhan 430056,China

出　　处：《China Geology》2024年第3期517-532,共16页中国地质（英文）

基　　金：jointly supported by the project of Chinese National Natural Science Foundation(42107485);National Key R&D Program(2020YFC1512400,2018YFC800804);China Geological Survey(DD20190282,DD20221734,and DD20230323)。

摘　　要：The construction of modern livable cities faces challenges in karst areas,including ground collapse and engineering problems.Wuhan,with a population of 13.74×10^(6) and approximately 1161 km^(2)of soluble rocks in the urban area of 8569.15 km^(2),predominantly consists of concealed karst areas where occasional ground collapse events occur,posing significant threats to underground engineering projects.To address these challenges,a comprehensive geological survey was conducted in Wuhan,focusing on major karstrelated issues.Geophysical methods offer advantages over drilling in detecting concealed karst areas due to their efficiency,non-destructiveness,and flexibility.This paper reviewed the karst geological characteristics in Wuhan and the geophysical exploration methods for karst,selected eight effective geophysical methods for field experimentation,evaluated their suitability,and proposed method combinations for different karst scenarios.The results show that different geophysical methods have varying applicability for karst detection in Wuhan,and combining multiple methods enhances detection effectiveness.The specific recommendations for method combinations provided in this study serve as a valuable reference for karst detection in Wuhan.

关 键 词：Ground Penetrating Radar(GPR) Electric Resistivity Tomography(ERT) Opposing-coils Transient Electromagnetic Method(OCTEM) Microtremor Array Measurements(MAM) Multi-channel Analysis of surface wave(MASW) Multi-source surface wave exploration(MSSW) Electromagnetic wave CT(EM CT) Surface Nuclear Magnetic Resonance(SNMR) Concealed karst Urban geological survey engineering 

分 类 号：P631[天文地球—地质矿产勘探] P642.25[天文地球—地质学]