Method for paving HDPE (high-density polyethylene) geomembranes in refuse landfill

A technology of landfill and laying method, which is applied in infrastructure engineering, protection devices, buildings, etc., can solve the problems of high construction cost, high maintenance cost, fracture of welds, etc., and achieves low maintenance cost, reduced maintenance frequency, Welding effect

Inactive Publication Date: 2014-04-30
HANGZHOU QIANXI ENVIRONMENTAL PROTECTION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After the existing HDPE geomembrane is lapped, it is easy to break at the weld when it is cut at the end, resulting in wast

Method used

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  • Method for paving HDPE (high-density polyethylene) geomembranes in refuse landfill

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the drawings.

[0017] 1. Cut and lap, cut HDPE geomembrane, and lap in and around the reservoir area;

[0018] 2. Hot melt welding, such as figure 1 , Is a schematic diagram of laying and welding HDPE geomembrane in the landfill of the present invention, the HDPE geomembrane upper piece 61 and the lower piece 62 are overlapped, and compressed air is blown between the overlapped upper and lower pieces to form a compressed air channel 17 , Welding seams 15 and 16 are formed on the left and right sides of the compressed air channel, and the two pieces of HDPE geomembrane are hot-melted. The hot-melting temperature is maintained at 100-150℃. Weld with 16 places, the welding temperature is 450-480℃;

[0019] 3. Inspection and repair, check the HDPE geomembrane after the hot melt welding is completed, check the damage of the HDPE geomembrane laid, if the damage is greater than 10% of the width of each HDPE ...

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Abstract

The invention discloses a method for paving HDPE (high-density polyethylene) geomembranes in a refuse landfill. The method comprises the following steps: (1) clipping and lapping: clipping the HDPE geomembranes, and lapping the geomembranes in and around a reservoir area; (2) sweat soldering: inflating compressed air between an upper piece and a lower piece which are lapped, so as to form a compressed air channel, forming welded joints at the left and right sides of the compressed air channel, thermally melting the two geomembranes, butting the geomembranes quickly after the temperature is reached, and welding the welded joints; and (3) inspection and repair: inspecting the HDPE geomembranes which are thermally welded, inspecting the damaged parts of the paved HDPE geomembranes, clipping the sections if the damaged parts are more than the width of each HDPE geomembranes by more than 10%, and repaving. By adopting a method of inflating the compressed air in the geomembranes, cracked welded joints are not generated when the surplus materials are chipped and torn down after the paving is finished, so that the repair cost can be reduced.

Description

Technical field [0001] The invention relates to a method for laying HDPE geomembrane in a waste landfill, and belongs to the technical field of environmental protection. Background technique [0002] The landfill reservoir area is usually built on a sloped terrain. The slope of the terrain outside the reservoir area is naturally downward, including an anti-seepage system and a drainage system. The anti-seepage system refers to the internal and Pave anti-seepage materials on the base soil around the reservoir area to prevent the landfill leachate from infiltrating into the ground for secondary pollution; the diversion system refers to laying two layers of pipelines to separately guide and drain the groundwater accumulated in the base soil due to the construction of the waste landfill reservoir And landfill leachate. [0003] HDPE is a high-density polyethylene with high anti-seepage effect. HDPE geomembrane has been gradually used in landfill anti-seepage systems. After the existi...

Claims

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Application Information

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IPC IPC(8): E02D31/00
Inventor 蒋红伟程斌
Owner HANGZHOU QIANXI ENVIRONMENTAL PROTECTION SCI & TECH
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