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物探与化探  2020, Vol. 44 Issue (6): 1482-1489    DOI: 10.11720/wtyht.2020.1339
  工程勘查 本期目录 | 过刊浏览 | 高级检索 |
地下电缆的探地雷达图像特征与识别技术
李靖翔1(), 赵明1, 赖皓1, 熊双成1, 唐阳2
1.中国南方电网超高压公司 广州局,广东 广州 510000
2.三峡大学 电气与新能源学院,湖北 宜昌 443002
Imaging detection and recognition technology of underground cable based on ground penetrating radar
LI Jing-Xiang1(), ZHAO Ming1, LAI Hao1, XIONG Shuang-Cheng1, TANG Yang2
1. GZ Bureau, EHV Power Transmission Company of China Southern Power Gird, Guangzhou 510000, China
2. College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China
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摘要 

为实现对地下电力电缆的快速探测与识别,提出了基于探地雷达对地下电缆成像的探测与识别方法。首先通过正演实测实验分析了地下带电电缆与非带电介质的探地雷达探测图像波形特征,突出了带电电缆反射波形的特殊性;然后建立了基于磁场叠加原理的常见布线方式下的电缆磁场辐射计算模型,从电缆结构与磁场分布角度解释了电缆探测波形的形成原因及特殊性,进一步突出了电缆与其他非带电地层介质的区别,提出了基于探地雷达对地下电缆成像的探测与识别方法;最后通过反演实验对所提方法进行了验证,实验结果表明所提方法在电缆的探测与识别上具有良好的应用效果。

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李靖翔
赵明
赖皓
熊双成
唐阳
关键词 探地雷达地下电缆正演实验快速探测    
Abstract

In order to realize the rapid detection and identification of underground power cables, this paper proposed a method based on ground penetrating radar for imaging and identification of underground cables. Firstly, the characteristics of the detection waveforms of the underground charging cable and the non-charged medium under the action of ground penetrating radar were analyzed by forward modeling experiments, which highlighted the particularity of the reflected waveform of the charged cable, and then the magnetic field radiation of the cable under the common wiring mode was established based on the principle of magnetic field superposition. The calculation model explained the cause and particularity of cable detection waveform from the perspective of cable structure and magnetic field distribution, and further highlighted the difference between the cable and other non-charged formation media. A method for detecting and identifying underground cable based on ground penetrating radar was proposed. Finally, the proposed method was verified by inversion experiments. The experimental results show that the proposed method has a good application effect in cable detection and identification.

Key wordsground penetrating radar    underground cable    forward modeling    rapid detection
收稿日期: 2019-06-28      出版日期: 2020-12-29
ZTFLH:  TM757.1  
  P631.1  
基金资助:湖北省科技计划项目技术创新专项重大项目(2016AAA040)
作者简介: 李靖翔(1985-),男,湖北襄阳人,高级工程师,研究方向为特高压运行维护管理。Email:274159613@qq.com
引用本文:   
李靖翔, 赵明, 赖皓, 熊双成, 唐阳. 地下电缆的探地雷达图像特征与识别技术[J]. 物探与化探, 2020, 44(6): 1482-1489.
LI Jing-Xiang, ZHAO Ming, LAI Hao, XIONG Shuang-Cheng, TANG Yang. Imaging detection and recognition technology of underground cable based on ground penetrating radar. Geophysical and Geochemical Exploration, 2020, 44(6): 1482-1489.
链接本文:  
http://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1339      或      http://www.wutanyuhuatan.com/CN/Y2020/V44/I6/1482
典型介质 典型介质探测图像 雷达图像特征描述 典型介质 典型介质探测图像 雷达图像特征描述
金属水管 图像波长较短,波形呈尖锐状,反射波幅值较大,无多次反射与振荡现象 地层空洞 反射波明显,图像局部有较强反射波且波形较长
花岗岩 图像波长较短,波形尖锐但不明显,反射波幅值小 电缆 图像上方密集三角反射波形为钢筋网反射波,下方回波呈明显叠加与振荡状
排水通道 图像上方为钢筋网路面,图像下方局部有较强回波 公路 波形近似水平分布,波形连续且相似,为路面分层界面
Table 1  不同介质雷达探测图像
Fig.1  电缆结构示意
Fig.2  电缆磁场辐射示意
Fig.3  电缆磁场强度分布规律
Fig.4  探地雷达电磁波辐射电缆示意
Fig.5  典型介质的探测单道波形示意
Fig.6  小区现场探测图
Fig.7  区域一的带电电缆探测波形
Fig.8  区域一现场开挖验证
Fig.9  区域二非带电介质探测波形
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