Geotextile membranes, which combine seepage prevention and drainage, are now increasingly used in various reinforced anti-seepage projects such as water conservancy, transportation, tunnels, airports, metallurgical tailings, waste disposal sites, and roof waterproofing. Here is a summary of the reasons for and repair methods of damage to anti-seepage geotextile membranes.

During construction, it is crucial to perform proper welding on the impermeable geomembrane, and there are specific requirements for the welding process.

Seam treatment of waterproof geotextile is a critical construction process, typically employing a hot welding method. The surface of the PE film is heated to melt, then fused together under pressure. Before welding, the two edges of the PE single film at the seam of the waterproof geotextile must be adjusted to overlap a certain width, usually 6 to 8 cm, ensuring a flat and wrinkle-free overlap.

For laid geomembranes, the edges must be free of oil, moisture, and dust. Use a welding machine to weld the geomembranes. The geomembrane is a widely used geosynthetic material, whose super-high performance has been universally recognized by users. However, it is prone to damage during transportation and construction, and damaged holes will inevitably affect the seepage prevention effect of the project.

Selection standards, construction welding methods, and requirements for the impermeable geomembrane are all followed by specific guidelines. The construction of impermeable geomembrane materials necessitates a rigorous scientific quality assurance system. The main causes of damage to impermeable geomembranes are these, and we must strive to avoid damage and use the geomembrane reasonably to effectively extend its service life.

Geotextile Membrane Repair Methods

One: Selection of geomembrane repair materials. It is best to choose materials similar to or closely resembling the geomembrane material for repairs. Using leftover geomembrane for repairs is highly suitable. If there is no leftover geomembrane, at least select a material with similar texture, softness, and extensibility to ensure a good match during later use.

Determine the repair scope of the geomembrane. Do not repair based on the existing damaged area; instead, focus on the current damage level as the center and extend outwards within a radius of approximately 30 centimeters. This approach will not only reduce the likelihood of leakage but also prevent track-off during the later stretching process.

Three: Determining the extent of damaged area. If the calculated area of the damaged geotextile exceeds one-tenth of the total area, it is necessary to opt for the removal of the damaged area rather than continuing repairs at the original site.

Four: Workers performing geomembrane repairs should wear soft clothing and shoes. Additionally, they must be cautious with the use of construction tools, and avoid smoking as ash can easily ignite and cause fires.