防渗膜集成永久性渗漏监控系统的定位
Leak location using permanent leak detection system for HDPE geomembrane
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摘要: 介绍了由导电HDPE防渗膜和预埋渗漏监控模块共同构成的集成永久性防渗膜渗漏监控系统及其基本工作原理，阐述了第3代导电防渗膜以及渗漏监控模块的特点，重点介绍了在贵州省环境保护厅监督下进行的我国第1次防渗膜永久监控系统现场验证实验，就实验场地规划、导电防渗膜的安装与检测、渗漏监控模块的安装、系统调试和实验过程分别做了说明。实验结果表明，监控系统可以对直径1 cm的小孔渗漏发出实时报警信号，定位的漏点与实际漏点间的差距仅为0.68 m，相对于1 405 m2的实验区域，定位精度达到了1/1 000，显示了极高的敏感度和良好的渗漏定位能力。该现场验证实验的成功，对于建立有效的填埋场环境监控系统有着积极的影响。Abstract: This paper presents a permanent leak detection system for the HDPE geomembrane by combining the conductive geomembrane and embedded leak detection modules. The working mechanism of the system is described. The main features of the third generation conductive HDPE geomembrane and leak detection modules are introduced. The first verification test of the system in China was carried out in Guizhou province and monitored by the Guizhou Environmental Protection Administration. The planning of the test site,installation and inspection of the conductive geomembrane,installation of the leak detection modules,system adjustment,and the test procedures are introduced. The test results showed that the system can detect leakage sources as small as 1 cm in diameter and issue an immediate warning. The distance between the leak location determined by the system and that of the actual hole was only 0.68 m. This indicates a precision of 1/1 000 in relation to the tested area of 1 405 m2. This reflects a high sensitivity and a satisfactory leak location capacity. The success of this verification test had a positive impact on the establishment of an effective environmental leak detection system for geomembranes of solid waste containment facilities.
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Key words:
- geomembrane /
- leakage monitoring /
- leak location /
- verification test
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