In the past, geomembrane testing and anti-seepage geomembrane have been widely used in various projects such as waste residue disposal sites, garbage landfills, artificial lakes, reservoirs, crossing tunnels, petrochemical mining and so on. With the rapid development of my country's economy, environmental problems have become increasingly prominent. Become our country’s top priority.

How to detect the weld of geomembrane damage?

When geomembrane damage is detected and welded, the overlap between the anti-seepage membrane and the anti-seepage membrane should not be less than 10cm. At the same time, minimizing welds can save material costs and improve the stability of the anti-seepage system. Generally, there are two ways to inspect welds with geomembrane: the first is to use an air pump, pressure gauge and hollow needle for inspection; the second is to use a vacuum pump for inspection. The first method requires inserting a hollow needle into the weld to pressurize the entire weld and block the two edges of the weld, and then detect changes in air pressure.

The second method does not need to destroy the impermeable membrane. Press the vacuum pump with soap liquid to pressurize the soap liquid to detect changes in the air-tight air pressure in the weld. The air pressure of the air pump reaches and maintains 250kpa within 2 minutes, and then observe for 10 minutes. The allowable air pressure drop is within 10kpa. If the drop is greater than 10kpa, the welding is unqualified, and it needs to be repeated more than ten times.

Geomembrane detection Impermeable geomembrane is called an impermeable membrane, and its main function is to prevent leakage and isolation. The normal specification is 6 meters in width * 50 meters in length, and -300 square meters in width (roll). Because this width and length cannot meet the requirements of large-scale engineering projects, during the laying process (special adhesive for geomembrane), a dual-track hot melt welding machine or KS hot melt adhesive should be used. For large-scale leakage detection projects, technicians and The construction supervisor comes to instruct and construct the welding. Landfill leakage detection also requires its own steps.