Preparation for Laying
Before laying the geotextile membrane, the foundation should be checked for compaction. The site should be clean and level; the base for laying the geotextile membrane should be free of roots, stones, and other sharp objects, with pebbles and soil clods no larger than 3cm in diameter. The laying environment should be between 2°C and 20°C, with no rain or snow, and wind speeds not exceeding 5 levels. If there is a slope, the slope angle should not be greater than 45°, and anchor trenches should be dug 60-100cm up the slope.
Laying and Joining
Installation: We begin the installation process after properly preparing the base. The installation should be smooth, proceeding from bottom to top (starting with the base and then the slope), with moderate tension to avoid over-tightening. Allow for some extra space, ensuring a tight contact with the ground without any gaps or air pockets. In case of windy weather, to prevent large-scale displacement of the geomembrane, place weighted bags on the geomembrane for stabilization. Optimal spacing for the weighted bags is every 60-80 cm. When laying on a slope, we should first secure one end and ensure to place weights immediately to prevent the geomembrane from slipping.
When joining geomembranes, the overlap width should be between 10-15mm (sufficient for the crawler welding machine), and to prevent damage to the geomembrane, it is best to prohibit personnel and machinery from walking on it. Welders should wear soft-soled shoes during welding and avoid shoes with spikes or hard soles. Geomembrane welding should not exhibit skipped or incomplete welds. After the welding is completed, an inflation and pressure test should be conducted to ensure the quality of the geomembrane weld.
In the event of a geomembrane tear, immediate repair and replacement are required. During repairs, use a geomembrane patch larger than the tear by 30mm. Upon completion of the repair, label the repair date and the name of the person who made the repair at the repair site.
