隧道衬砌质量的地质雷达电磁波反射特征分析及应用  

Geological radar electromagnetic wave reflection characteristics of tunnel lining quality Analysis and Application

作　　者：胡汛训 李理 付小念 付代光 张杨[3] HU Xunxun;LI Li;FU Xiaonian;FU Daiguang;ZHANG Yang(Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute,Wuhan 430064,China;Changjiang Geotechnical Engineering Co.,Ltd.,CISPDR Corporation,Wuhan 430010,China;Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]湖北省水利水电规划勘测设计院,武汉430064 [2]长江设计集团长江岩土工程有限公司,武汉430010 [3]长江科学院水利部岩土力学与工程重点实验室,武汉430010

出　　处：《物探化探计算技术》2023年第5期625-634,共10页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：针对乌尉高速公路天山胜利隧道衬砌施工中出现的脱空、厚度不足和不密实等质量问题,采用基于时域有限差分(FDTD)的模拟方法,对隧道衬砌中常见的缺陷进行正演模拟,正演结果与实测数据反射剖面的地球物理特征一致性吻合较好。其次,本研究对于典型缺陷或标志物与之对应的地质雷达电磁波反射特征进行了总结和归纳,结果表明,隧道衬砌典型缺陷或标志物地质雷达电磁波,具有振幅突变、电磁波同相轴畸变、波形极性反转等特征,这些特征对于现场检测人员快速判读、解译采集的雷达数据有重要参考作用,也对目标地质体和隧道衬砌缺陷快速准确识别有较大帮助,有助于提高一线作业人员的检测效率,确保隧道整体稳定性及安全运营。For the quality problems such as debonding,insufficient thickness,and uncompactness in the lining construction of the Tianshan Shengli Tunnel of Wuyu Expressway.The geo-radar detection method based on the finite difference in the time domain(FDTD) is used to simulate the common defects in tunnel lining orthorectified,and the orthorectified results are in good agreement with the geophysical characteristics of the reflection profile of the measured data.Secondly,this study summarizes the geo-radar electromagnetic wave reflection characteristics of typical defects or markers,and the results show that the geo-radar electromagnetic waves of typical tunnel lining defects or markers have characteristics such as abrupt change in amplitude,in-phase axis distortion,waveform polarity reversal,etc.These characteristics are essential for the field inspectors to quickly interpret and decipher the collected radar data and the target geological.It also helps to identify the target geology and tunnel lining defects quickly and accurately,which helps to improve the detection efficiency of front-line operators and ensure the overall stability and safe operation of the tunnel.

关 键 词：隧道衬砌 时域有限差分 缺陷 电磁波反射波特征 

分 类 号：P631.3[天文地球—地质矿产勘探]