Welding and detection process used for HDPE geomembrane of refuse landfill

Abstract

The invention discloses a welding and detection process used for an HDPE geomembrane of a refuse landfill. Welding equipment in the welding process comprises a double-seam welding machine, an extrusion welding machine and a hot air blower, double-seam welding is mainly adopted, for pressing sealing and seam lapping or local repairing, the extrusion welding machine is adopted for welding seam extrusion, the hot air blower is used for blowing and melting the lower portion of a lap joint part; and the detection process is mainly based on air pressure detection, vacuum detection is adopted for cooperation, the detection process is suitable for the situation of local width-based propulsion or a welding seam full detection requirement, and air pressure detection and vacuum detection are both based on the CJJ113-2007 standard. The welding and detection process comprises welding construction and detection construction processes, under the condition that full-inspection construction is needed for local welding seams or width-based propulsion is required, the effect of the welding machine can be fully achieved, extrusion welding repairing work is reduced, the welding seam detection process is simplified, the construction efficiency is improved, and the requirements for seepage prevention and long-term operation of the refuse landfill can be met.

Description

technical field [0001] The invention relates to the technical field of HDPE geomembrane welding construction, in particular to a welding and detection process for HDPE geomembrane in landfills. Background technique [0002] In the HDPE geomembrane welding construction of the landfill, since the HDPE geomembrane is one of the most important anti-seepage layers, it is related to whether it can prevent the landfill leachate from seeping down and causing environmental pollution, and the HDPE geomembrane welding node is the main The weak point, so HDPE geomembrane welding is the focus of anti-seepage design and quality control. Such as figure 2 As shown, it is a conventional joint of HDPE geomembrane welding. The traditional HDPE geomembrane welding method mainly adopts double seam welding, and the mode of extrusion welding repair. However, the welding method of the traditional method has not formed a system, which increases the area of ​​more welds and joints or vacuum inspect...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome technical defects such as difficulty in guaranteeing the welding quality of HDPE geomembrane in landfills and heavy inspection workload after welding in the prior art, the present invention provides a welding and inspection process for HDPE geomembrane in landfills, through Formulate the technological process of welding construction and inspection to reduce the number of welds, simplify and model the inspection process, improve the construction efficiency under the condition of full inspection, cooperate with the later practice to insert flow operation, and meet the inspection requirements of HDPE geomembrane at the same time, ensuring Welding quality, to solve the above technical problems

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