等值反磁通瞬变电磁法在城市地质调查中的应用  

Application of the opposing-coils transient electromagnetic method in urban geological surveys

作　　者：何胜 王万平 董高峰 南秀加 魏丰丰 白勇勇 HE Sheng;WANG Wan-Ping;DONG Gao-Feng;NAN Xiu-Jia;WEI Feng-Feng;BAI Yong-Yong(Qinghai Bureau of Environmental Geology Exploration,Xining810008,China;Key Laboratory of Environmental Geology of Qinghai Province,Xin-ing810008,China;Qinghai 906 Engineering Survey and Design Institute Co.,Ltd.,Xining810007,China;Qinghai Institute of Geological Envi-ronment Survey,Xining810008,China;Qinghai Provincial Land Remediation and Ecological Restoration Center,Xining810008,China)

机构地区：[1]青海省环境地质勘查局,青海西宁810008 [2]青海省环境地质重点实验室,青海西宁810008 [3]青海九零六工程勘察设计院有限责任公司,青海西宁810007 [4]青海省地质环境调查院,青海西宁810008 [5]青海省国土整治与生态修复中心,青海西宁810008

出　　处：《物探与化探》2023年第5期1379-1386,共8页Geophysical and Geochemical Exploration

基　　金：青海九零六工程勘察设计院有限责任公司科技项目“基于电震联合的深层卤水探测理论与识别方法研究”(2023-KJ-04);青海省自然资源厅省基金项目“青海省海东市(平安区、乐都区)城市地质调查评价”(2022012023sh003)。

摘　　要：随着城市基础建设的快速发展,对城市地质工作的需求日益增强,城市地质调查工作显得尤为重要。在城市中开展物探工作,因探测目的和工作环境的不同,与传统应用物探方法相比,城市地质调查所采用的物探方法具有干扰因素多、施工场地和时间有限、探测精度要求高等特点,而等值反磁通瞬变电磁法具有抗干扰能力强、施工方便、快捷、分辨率高等优点。本文采用该方法在海东市城市地质调查评价中进行试验剖面,该剖面横穿11条公路和铁路,穿过厂房、学校、物流园、村庄、生活小区、河流等干扰物,干扰源众多。结合电阻率测深点资料,等值反磁通瞬变电磁法探测结果与电测深单点结果、钻探揭露情况吻合较好,证明该方法对城市地质调查探测是行之有效的。With the rapid development of urban infrastructure,the demand for urban geological work is increasing,and urban geological surveys become particularly important.Urban geophysical exploration has different exploration purposes and working environments from conventional geophysical exploration.Accordingly,compared with conventional geophysical exploration methods,the geophysical explora-tion methods for urban geological surveys face the challenges of many interference factors,limited construction sites and time,and high requirements for exploration accuracy.The opposing-coils transient electromagnetic(OCTEM)method enjoys a strong anti-interference ability,convenient and efficient construction,and high resolution.Therefore,this study employed the OCTEM method to investigate the test profile in the urban geological survey and evaluation of Haidong City.This test profile was subjected to numerous interference sources since it crossed 11 highways and railways and passed through factories,schools,logistics parks,villages,living quarters,and riv-ers.Consequently,the OCTEM results agree well with the results of single-point resistivity sounding and drilling results.Therefore,the OCTEM method proposed in this study is effective for urban geological surveys.

关 键 词：等值反磁通瞬变电磁法 城市地质 干扰源 电阻率测深 

分 类 号：P631.4[天文地球—地质矿产勘探]