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Two-electrode method for geomembrane testing

Two-electrode method for geomembrane testing

  • Categories:Industry News
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  • Time of issue:2021-01-11
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(Summary description)The dual-electrode detection method for geomembrane detection should be able to detect and locate leaks and damages not less than 6mm on the anti-seepage geomembrane.

Two-electrode method for geomembrane testing

(Summary description)The dual-electrode detection method for geomembrane detection should be able to detect and locate leaks and damages not less than 6mm on the anti-seepage geomembrane.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-01-11
  • Views:0
Information

The dual-electrode detection method for geomembrane detection should be able to detect and locate leaks and damages not less than 6mm on the anti-seepage geomembrane.

When testing the geomembrane, please make sure that the gravel, sand or soil on the impermeable geomembrane is tightly attached to the impermeable film and should be in a damp and conductive state.

The detection steps of the two-electrode method should include: on-site insulation, buried electrodes, equipment test calibration, actual detection, leak point analysis, retest and report classification.

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在发现泄漏和损坏之前,应准备好防渗土工膜的上层和下层进行绝缘,包括消除检测区域中的导电物体和与其他电源接触的物体,以确保渗流坡度不受外部电场的影响,土工布,颗粒材料层和可能连接到场外的任何导电物体都应隔离。有需要时应采取诸如挖沟的措施以使该区域绝缘。

土工膜检测应根据预定的测试区域放置设备。 电源的负极应埋在防渗土工膜下,正极应放在防渗土工膜上。

在进行土工膜检测操作之前,应先校准泄漏检测设备并确定检测间隔。 用于确定土工膜检测结果的设备校准和距离测试可以使用现场的实际损坏孔或实验室中的人工模拟损坏孔。

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人工模拟的泄漏和损坏的孔应按照以下程序进行操作:

挖开防渗土工膜上的覆盖材料,并在防渗土工膜上切开6mm以上的孔;

使用直径不小于6mm的金属导体作为电极,埋入不透水土工膜的覆盖层中,并与不透水土工膜保持接触;

以同样的方式,将另一根金属导体埋在不可渗透的土工膜下和基础层之上。

在进行土工膜检测之前,应进行测试检测和检测设备的校准。土工膜检测的线和点间距应根据校准后的检测参数和仪器的覆盖范围确定。防渗膜完整性检测、填埋场渗漏检测也需注意。

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