T/AHEMA 002-2020 Active Group standards

T/AHEMA 002-2020 The HDPE geomembrane leak point measurement using dual electrodes method

Publish Date: 2020-07-15 Implement Date: 2020-08-15 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/AHEMA 002-2020

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Environmental protection

ICS Name: Pollution, pollution control, and protection

Publish Date: 2020-07-15

Implement Date: 2020-08-15

Scope

Scope: This standard specifies the terms and definitions, technical principles, measurement conditions, measurement process and methods, determination and re-measurement of leakage points, and measurement reports for the double-electrode method of measuring leakage points in HDPE geomembranes. This standard applies to the measurement of leakage points using the double-electrode method in impermeable engineering projects constructed with geomembranes (not limited to landfills, sewage ponds, chemical reaction tanks, hazardous waste treatment projects, and soil remediation projects); Main technical content: 6. Measurement process and methods 6.1 Protection of measurement personnel: Measurement personnel should wear insulated gloves and shoes. Instrument calibration: Before conducting measurement operations, select no less than 3 actual leakage points in the impermeable engineering site as calibration points to calibrate the measurement equipment. The accuracy of leakage point detection should reach 100%. Measurement conditions: Based on the dryness of the measurement site, arrange manual watering to maintain the humidity of the cover above the geomembrane at not less than 50% RH. Block division: Grid-based block division of the measurement engineering area, with block length: ≤40m, block width: ≤40m. 6.2 Specific measurement methods Electrode burial: Bury the positive electrode in one grid block on the upper side of the geomembrane and near the end of the block; bury the feedback electrode in the periphery of the measurement area. Use manual watering to ensure good electrical conductivity of all electrodes. Leakage point measurement: Use the excitation power supply and start the mobile measurement device. Move within the block in the direction parallel to the connection line between the positive electrode and the feedback electrode to measure leakage points at a frequency of no more than 1.5m/time. Replace the block: Repeat 6.1.2 and 6.2.2 until all measurement work is