地球物理学进展 ›› 2019, Vol. 34 ›› Issue (3): 1244-1248.doi: 10.6038/pg2019CC0158

• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) • 上一篇    下一篇

地下管线探测雷达图特征分析

张劲松1,2,丛鑫3,*(),杨伯钢1,2,王星杰1,2,刘英杰1,2,李新煜1,2   

  1. 1. 北京市测绘设计研究院,北京 100038
    2. 城市空间信息工程北京市重点实验室,北京 100038
    3. 北京竞元科技有限公司,北京 102200
  • 收稿日期:2018-07-16 修回日期:2019-04-10 出版日期:2019-06-20 发布日期:2019-07-09
  • 通讯作者: 丛鑫 E-mail:cx@championjy.cn
  • 作者简介:张劲松,男,1984年生,湖北宜城人,硕士,高级工程师,国家注册测绘师,主要从事工程物探和工程测量研究.(E-mail: 13264361838@163.com)

Characteristics analysis of radar map on underground pipeline detection

ZHANG Jin-song1,2,CONG Xin3,*(),YANG Bo-gang1,2,WANG Xing-jie1,2,LIU Ying-jie1,2,LI Xin-yi1,2   

  1. 1. Beijing Institute of Surveying and Mapping, Beijing 100038, China
    2. Beijing Key Laboratory of Urban Spatial Information Engineering,Beijing 100038,China
    3. Beijing Champion JY Technology Company Limited, Beijing 102200, China
  • Received:2018-07-16 Revised:2019-04-10 Online:2019-06-20 Published:2019-07-09
  • Contact: Xin CONG E-mail:cx@championjy.cn

摘要:

地下管线探测是测绘和物探专业相结合的一项工作,对地下非金属管线探测目前最适用的方法是探地雷达法.为提高探地雷达探测地下管线的效率和探测准确性,使管线探测专业人士可以更好的掌握探地雷达探测地下管线技术,本文通过理论分析探地雷达探测地下管线的工作原理及在北京市近45000 km地下管线基础信息普查工作中大量实验,对不同管径、不同埋深、不同材质的管线进行雷达探测,对比分析各种管线雷达图像的特征.文章分析出管线管径的不同表现在雷达图上是抛物线水平距离跨度的不同,管径越大,水平距离跨度越大.管线埋深的不同则表现在雷达图抛物线拖尾部分水平距离不同,埋深越深则拖尾部分跨度更长.不同管径和埋深的管线在探测的时候需要采用不同中心频率的雷达天线进行探测.管线材质的不同则特征更明显,直接表现在有无多次波出现和多次波的强弱、是否屏蔽深层有效信号、同相轴相位表现形式及波形特征等各个方面.该研究成果可指导今后城市地下管线普查和管线竣工验收时的管线探测工作.

关键词: 管线普查, 探地雷达, 雷达图特征, 电磁波, 探测

Abstract:

Underground pipeline detection is a combination of Surveying and geophysical exploration. At present, the most suitable method for detecting underground non-metallic pipelines is Ground Penetrating Radar (GPR). In order to improve the efficiency and accuracy of detecting underground pipelines by GPR, and so that pipeline detection professionals can better grasp the ground penetrating radar technology to detect underground pipelines, in this paper, the principle of GPR detection of underground pipelines and a large number of experiments in the survey of underground pipeline foundation information about 45000 kilometers in Beijing are analyzed in this paper. This underground pipeline census surveyed a total of water supply, gas, electricity, communications, radio and television, drainage, industrial and other pipelines. The material, diameter and burial depth of these pipelines are different. Radar detection of pipelines with different diameters, depths and materials is carried out. The characteristics of various pipeline radar images are compared and analyzed. The article analyzes the different performance of pipeline diameter on radar map, which is different from horizontal distance of parabola. The greater the diameter of the pipe, the greater the horizontal distance will be. The smaller the pipe diameter, the smaller the horizontal distance will be. The difference of buried depth of pipeline is different from the horizontal distance of parabola trailing part of radar chart. The deeper the depth of the buried depth is, the length of the trailing section is longer. Pipelines with different diameters and depths should be detected by radar antennas with different central frequencies. Buried deep pipelines are detected by low frequency radar antenna; Detection of buried pipeline with high frequency radar antenna. The different features of the pipeline material are more obvious. It is directly manifested in the presence of multiple waves and the intensity of multiple waves, the shielding of the deep effective signal, the phase manifestation of the phase axis and the characteristics of the waveform. The research results can guide the pipeline detection in the future urban underground pipeline survey and pipeline completion acceptance.

Key words: Pipeline survey, Ground Penetrating Radar (GPR), Features of radar map, Electromagnetic wave, Probe

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