电磁波CT技术在城市隧道岩溶勘查工程中的应用  

Application of Electromagnetic Waves for Karst Exploration in Urban Tunnels

作　　者：彭军[1] 李期佳 高建华[1] 王鹏[1] 熊友亮 PENG Jun;LI Qijia;GAO Jianhua;WANG Peng;XIONG Youliang(Changjiang Institute of Survey Technical Research,MWR,Wuhan 430011,China;Wuhan Municipal Engineering Design and Research Institute Co.Ltd.,Wuhan 430023,China)

机构地区：[1]水利部长江勘测技术研究所,武汉430011 [2]武汉市政工程设计研究院有限责任公司,武汉430023

出　　处：《CT理论与应用研究（中英文）》2023年第4期471-479,共9页Computerized Tomography Theory and Applications

摘　　要：随着城市发展过程越来越快,交通与环境的矛盾日益突出,为了保全地面建筑物,采用隧道方案也越来越多。城市岩溶探测以钻探为主,再辅以高密度电法、浅层地震反射法等传统物探方法,这些方法效率低,且受场地条件限制,很难实施。电磁波CT技术作为近些年发展起来的地球物理探测技术,具有分辨率高、野外作业便利等优势,可以较好的揭露地下岩溶发育规模及特征。本文在传统的数据处理基础上,运用电磁波CT探测技术,通过反演设置最低限值、选用反射投影结果作为初始模型、利用低通滤波和角度限制技术和采取连续测线模式架构程序进行归一化计算处理等处理技术方法,大大提高电磁波CT资料解译的精确度。研究表明,电磁波CT探测技术在岩溶勘查中有很好的应用效果,探测结果对于城市隧道工程建设具有较大的指导意义。With rapid urbanization,the contradiction between traffic and the environmental pollution caused by it is becoming increasingly prominent.To preserve ground buildings,an increasing number of tunnel schemes are adopted.Urban Karst exploration is based on drilling,supplemented by traditional geophysical methods such as high-density electrical method and shallow seismic reflection method,which are inefficient and difficult to implement owing to site conditions.As a geophysical exploration technology developed in recent years,electromagnetic wave technology has the advantages of high resolution and convenient field operation,which can better reveal the development scale and characteristics of underground Karst.Based on traditional data processing,setting the minimum value,choosing the reflection projection result as the initial model,using the low-pass filtering and angle-limiting technology,and adopting the structure program of continuous survey mode to carry out normalized calculation processing can greatly improve the accuracy of electromagnetic wave CT data interpretation.The findings of this study show that the electromagnetic wave detection technology can be applied effectively in Karst exploration,and its detection results have great guiding significance in urban tunnel engineering.

关 键 词：电磁波CT 城市隧道 岩溶探测 

分 类 号：P631[天文地球—地质矿产勘探]