Geotextile membranes, combining seepage prevention and drainage, have been increasingly applied in various reinforced seepage projects such as water conservancy, transportation, tunnels, airports, metallurgical tailings, waste disposal sites, and roof waterproofing. Here, we summarize the causes of damage and repair methods for waterproofing geotextile membranes.

Ensure proper welding during the construction of the anti-seepage geotextile membrane, as it has specific requirements.

Geotextile seaming is a critical construction procedure, typically employing hot welding techniques. This involves heating the surfaces of the PE film to be joined, causing them to melt, and then fusing them together under pressure. Before welding, the two edges of the PE single film at the seam must be adjusted to overlap a certain width, usually 6 to 8 cm, ensuring a flat and wrinkle-free seam.

For laid geomembranes, the edges must be free of oil, moisture, and dust. Welding machines should be used for welding the geomembranes. Geomembranes are a widely-used geosynthetic material, with their superior performance being universally recognized by customers. However, they are prone to damage during transportation and construction, which inevitably affects the waterproofing effectiveness of the project.

The selection criteria for the geomembrane material, construction welding methods, and requirements are all strictly adhered to. The construction of geomembrane materials requires a rigorous and scientific quality assurance system. The main causes of damage to geomembranes are these; we must strive to avoid damage and use the geomembrane rationally to effectively extend its service life.

Geotextile Membrane Repair Methods

One: Selection of Geomembrane Repair Materials. When repairing geomembranes, it is essential to choose materials that are identical or similar to the geomembrane material. Using leftover geomembrane for repairs is highly suitable. If there is no leftover geomembrane, at least select materials with similar properties, such as texture, softness, and extensibility, to ensure a good match during later use.

Two: Determining the Scope of Geomembrane Repair. Do not repair according to the existing damaged area; instead, center on the current level of damage and extend outward within a radius of approximately 30 centimeters. This approach will not only minimize the likelihood of leakage but also prevent derailing during the subsequent stretching process.

Three: Determining the Removal of Damaged Area. If the area of the geotextile membrane damage exceeds one-tenth of the total area, it is advisable to remove the damaged area rather than continue repairing at the original location.

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 to prevent ash from causing fires.