How to solve the problem of thermal expansion and contraction of HDPE geomembrane?
Release time:
2020-08-03
Geomembrane is widely used, and how to solve the problems encountered in construction is also a problem. HDPE geomembrane is currently widely used in waste sanitary landfills. It is an impermeable material made of high molecular polyethylene through blow molding or flat extrusion, and has strong durability. HDPE geomembrane is hot.
Geomembrane is widely used, and how to solve the problems encountered in construction is also a problem. HDPE geomembrane is currently widely used in waste sanitary landfills. It is an impermeable material made of high molecular polyethylene through blow molding or flat extrusion, and has strong durability. HDPE geomembrane is hot.
The expansion and contraction are large, so the thermal expansion and contraction of the material should be reserved in the construction. The HDPE film is laid on the same day. Try to minimize wrinkles and drag. At the same time, it should not be stretched too tightly. Otherwise, the stress caused by local deformation will be too large and the HDPE film will be damaged.
The protection of HDPE film during the construction of the leachate gravel guide drainage layer. The leachate drainage layer generally chooses materials such as pebbles or crushed stones, and the thickness should not be less than 30cm. Because the landfill area is large and the amount of crushed stone paving is very large, how to solve the problem of transportation and paving of crushed stone on HDPE membrane During the process, it is very important to prevent damage to the HDPE film. In this project, after many field tests, the operation method of partition construction is adopted, with 4 membranes laid as a unit of operation, 5mm thick steel plate is laid on the HDPE membrane as the material transportation channel, and the thickness of 1.5 meters or more is laid at a certain interval. Gravel the road, and then use the excavator to spread the gravel on the sidewalk from the inside out. Through the anti-leakage detection, this construction measure has a better protection effect on the HDPE film and rarely damages the HDPE film.
恒盈土工
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