Rapid detection system and detection method of geomembrane leakage in landfill

Abstract

The invention provides a system and method for rapidly detecting seepage of a geomembrane in a refuse landfill. The system comprises a mobile testing car, wherein the mobile testing car is matched with a testing probe, a signal processing circuit, a data acquiring system, a GPS (Global Position System) positioning device and a computer data analysis and model establishing system; and the testing probe is connected with the anode of a high-voltage (1000V) signal source through a lead, and the cathode of a high-voltage (1000V) direct signal source is connected with a high-voltage electrode. When a device for rapidly detecting seepage of the geomembrane in the refuse landfill is used for detection, large-scale soil aeration on the refuse landfill is not needed, and paving of a plurality of detecting electrodes is also not needed; and when seepage detection is carried out by using a high-voltage direct-current method, a seepage point can be rapidly searched through orienting and positioning by using a voltage field multi-dimensional vector analysis method which is different from the traditional plane voltage field analysis method. By using the GPS navigation of a vehicle-mounted detecting system, the detection process is accelerated, the detecting efficiency is increased, and the labor intensity is reduced.

Description

technical field [0001] The invention relates to leakage detection technology, in particular to a rapid detection method for geomembrane leakage in landfill sites. Background technique [0002] Landfill is currently the most widely used municipal solid waste treatment technology and method in China. With the growth of economy, the expansion of city scale and the improvement of people's living standards, the amount of urban domestic waste continues to increase, and the number of landfills also increases. The primary problem in the treatment of urban waste landfills is to prevent the groundwater and surface water near the landfill from being polluted by landfill leachate. Therefore, the design of the anti-seepage system must be considered on the basis of reasonable site selection. In the anti-seepage system of landfill, at present, high-density polyethylene (HDPE) is widely used as artificial liner at home and abroad, referred to as geomembrane. HDPE geomembrane used in landf...

AI Technical Summary

Problems solved by technology

At present, the leakage detection method used in the artificial anti-seepage layer is mainly the plane voltage field analysis method, which fails to detect the voltage change in the depth direction, and only analyzes from the two-dimensional direction. The voltage signal is directly analyzed without differential processing, which is susceptible to external interference

In addition, most detection methods require a large number of detection electrodes to be pre-embedded in landfills, which is not suitable for landfills where detection electrodes have not been buried before.

To sum up, it can be seen that there is no reliable method for leakage analysis of urban waste landfill sites, and the analysis methods used cannot reflect the actual leakage of leachate well, and the exact location cannot be found.

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