地球物理学进展 ›› 2018, Vol. 33 ›› Issue (2): 803-807.doi: 10.6038/pg2018BB0101

• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) • 上一篇    下一篇

直流电阻率法高阻管道漏点位置的探测与分析

郝晋荣1(),李毛飞1,*(),廖昱翔1,樊程1,胡代明1,2   

  1. 1. 中国矿业大学,资源与地球科学学院,江苏徐州 221116
    2. 中国科学技术大学,地球和空间科学学院,合肥 230026
  • 收稿日期:2017-08-03 修回日期:2018-02-16 出版日期:2018-04-20 发布日期:2018-07-18
  • 通讯作者: 李毛飞 E-mail:479901893@qq.com;939459366@qq.com
  • 基金资助:
    国家博士后基金面上项目(110101/3445)

Detecting and analyzing leak location of high resistivity pipeline by DC resistivity method

Jin-rong HAO1(),Mao-fei LI1,*(),Yu-xiang LIAO1,Cheng FAN1,Dai-ming HU1,2   

  1. 1. School of Resources and Geosciences, China University of Mining and Technology, Jiangsu Xuzhou 221116, China
    2. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
  • Received:2017-08-03 Revised:2018-02-16 Online:2018-04-20 Published:2018-07-18
  • Contact: Mao-fei LI E-mail:479901893@qq.com;939459366@qq.com

摘要:

近年来,城区供水管道发生破裂的现象屡见不鲜,给居民生活造成了极大的影响,解决城市管道漏水问题迫在眉睫.文章采用异常响应更为稳定、解释方便、低成本的直流电阻率法,基于直流电阻探测方法原理,提出利用电位异常方法探测管道漏点位置技术.首先利用数值模拟方法研究了高阻管道漏点电位异常响应,采用有限差分技术,将漏点位置设为源点,分别计算表面位置沿x方向和y方向电位差,数值模拟结果表明,该方法可以有效地定位漏点位置.利用物理实验对理论数值模拟结果进行验证,在实验过程中,分别在地表面沿管道方向以及垂直管道方向进行电位差测量,物理模拟结果与数值模拟结果相吻合,表明该方法合理有效.与其他管道探测相比,直流电位方法原理简单,抗干扰能力强,异常响应特征明显.

关键词: 直流电阻率法, 漏点位置, 数值模拟, 物理实验

Abstract:

In recent years, urban water-supplied pipeline rupture is common, which caused great influence to the residents’ life, solving the problem of urban pipeline leakage is imminent. The article uses DC resistivity method with stable response, easy explanation and low cost, based on the principle of DC resistivity method,the method of detecting pipeline’s leak location by measuring electrical potential. Firstly, the paper using technique of numerical simulation to study the response of potential of pipeline’s leak location.A source is located at leaking location and the surface potential difference along x-axis and y-axis are computed respectively by FDM. The results indicate that the method is effectively to locate leak location. Then, a physical experiment was used to verify the result of numerical simulation. The potential difference along pipeline’s direction and perpendicular to pipeline’s direction are respectively detected during experiment. The conformity between the result of physical simulation and the result of numerical simulation shows the method is effective. Compared with other pipeline detection methods, Advantages of DC potential method are simple operating principle and strong anti-jamming capability and response features of anomalies are conspicuous.

Key words: DC resistivity method, leak location, numerical simulation, physical simulation

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