| 垂直HDPE膜安装过程的电学破损检测方法 |
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| 引用本文： | 能昌信, 孙新宇, 徐亚, 刘景财, 董路, 王茂林. 垂直HDPE膜安装过程的电学破损检测方法[J]. 环境工程学报, 2018, 12(1): 349-355. doi: 10.12030/j.cjee.201705078 |
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| 作者姓名： | 能昌信 孙新宇 徐亚 刘景财 董路 王茂林 |
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| 作者单位： | 1.山东工商学院信息与电子工程学院,烟台 264005; 2.中国环境科学研究院土壤与固体废物环境研究所/环境基准与风险评估国家重点实验室,北京 100012; 3.北京师范大学水科学学院,北京 100875 |
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| 基金项目： | 中央级院所基本科研业务专项重点项目(2016YSKY14) 国家科技支撑计划项目(2014BAL02B03) 国家自然科学基金资助项目 (61503219) 山东省自然科学基金资助项目(ZR2014DL008) 北京市自然科学基金资助项目(8172048) |
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| 摘 要： | 针对柔性垂直防渗帷幕的结构特点和场地条件,参考水平防渗系统破损检测的偶极子方法,提出了适用于柔性垂直防渗帷幕HDPE铺设过程破损检测的改进的方法和装置——缆式电法。结果表明,当HDPE垂直膜两侧施加高压直流电时,漏洞附近介质电势有明显异常,可以通过检测电势定位漏点位置。基于现场实验数据对模拟漏洞检测结果进行验证,最后基于验证后的数据讨论了缆式电法在柔性垂直防渗帷幕渗漏检测方面的可行性和影响因素,得出以下主要结论:缆式电法通过检测HDPE膜表面电势的异常点(极小值点)对漏洞位置进行定位,它能够对漏洞进行准确定位,定位精度在0.1 m以内,有效检测距离大于1 m；供电电极和检测传感器到膜的距离越近,漏洞信号越明显,越容易判断漏洞及其所在位置；检测传感器间距越小,漏洞信号越明显,越容易判断漏洞及其所在位置,检测漏点处偏离实际漏点位置的距离越小。
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| 关 键 词： | 高密度聚乙烯(HDPE) 缆式电法 柔性垂直防渗帷幕 偶极子 渗漏检测 |
Electrical method to locate damage in vertical HDPE geomembrane during installation |
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| NAI Changxin, SUN Xinyu, XU Ya, LIU Jingcai, DONG Lu, WANG Maolin. Electrical method to locate damage in vertical HDPE geomembrane during installation[J]. Chinese Journal of Environmental Engineering, 2018, 12(1): 349-355. doi: 10.12030/j.cjee.201705078 |
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| Authors: | NAI Changxin SUN Xinyu XU Ya LIU Jingcai DONG Lu WANG Maolin |
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| Affiliation: | 1.School of Information and Electronic Engineering, Shandong Technology and Business University,Yantai 264005,China; 2.Environment Institute of Soil and Solid Waste/State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012,China; 3.College of Water Science, Beijing Normal University, Beijing 100875,China |
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| Abstract: | Aiming at the structural characteristics and site conditions of the flexible vertical anti-seepage curtain, an improved method and device for the damage detection of the flexible vertical anti-seepage curtain HDPE laying process are put forward by referring to the dipole method of the horizontal liner system. When a high-voltage direct current is applied on both sides the HDPE vertical membrane, the dielectric potential in the vicinity the hole will show a significant anomaly of potential, which can be detected by measuring the potential location of the leak. Based on the experimental data, the results of simulation test are verified. Finally, the feasibility and influencing factors of cable leakage method in flexible vertical barrier curtain leakage are discussed based on the validated data. The main conclusions are as cable type method can locate the position of the hole by detecting the abnormal point (minimum point) of the surface potential of the HDPE film. It can locate the fault with the accuracy of 0.1 m or less, and the effective detection distance is more than 1 m.The shorter of the distance from the electrode to the HDPE geomembrane or the distance from the sensors to the HDPE geomembrane, the more obvious the vulnerability signal is, the easier it is to determine the vulnerability and its location. The shorter the sensor spacing is, the more obvious the vulnerability signal is, the easier it is to detect the hole and its location, and the smaller the distance from the actual leak point is. |
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| Keywords: | high-density polyethylene(HDPE) cable type electrical method flexible vertical anti-seepage curtain dipole method leakage detection |
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