The geotextile roll shall be protected from damage before installation. The filament geotextile roll should be stacked in the area without water storage after leveling. The stacking height should not exceed the height width ratio of four rolls, and the identification film of the roll can be seen. Short wire geotextile roll must be covered with incomplete transparent raw materials to prevent UV embrittlement. In the whole process of storage, the details of identification and materials should be maintained. During the whole process of transportation (including the transportation from raw material storage place to work unit), the geotextile roll must be protected from damage. It is necessary to repair the geotextile roll damaged by physics. The price of geotextile damaged seriously cannot be applied. All geotextiles that touch the leaked chemicals are not allowed to be used in engineering projects.　　　　　

When laying geotextile, manual rolling method can be adopted; nylon cloth should be leveled and deformation capacity should be reserved appropriately. Generally, the installation of polyester or staple geotextile is in lap, seam and welding. The total width of stitching and welding is usually about 0.1M, and the total width of lap joint is usually about 0.2m. The geotextile will be exposed for a long time. The geomembrane shall be laid after the geotextile laying is approved by the on-site supervision engineer. The geotextile on the geomembrane is laid as above after the geomembrane is approved by the bid inviting party and the project supervisor. The corresponding serial numbers of geotextiles of each layer are TN and BN. The double-layer geotextile above, below, left and right of the membrane should be embedded into the reinforcement anchorage tank together with the geomembrane at the position where there is reinforcement anchorage groove.

Stitching of geotextile: all stitching must be carried out continuously (e.g. spot joints are not allowed). Before overlapping, the geotextile must be overlapped at least 150 mm. Stitch spacing selvage (raw material exposed edge) is 25mm. The joint of the geotextile is composed of one line of lock chain joint. The suture used for stitching should be a composite resin with a tension of more than 60N, and have the same or higher resistance to organic chemical etching and ultraviolet light as the geotextile. All "loose needles" on the sewn geotextile must be sewn again in the damaged area. Effective measures must be taken to prevent the soil layer, particulate chemicals or other chemicals from entering the geotextile layer after installation. The lapping of cloth can be divided into natural lap joint, seam joint or welding according to landform and application.

At the construction site, the geotextile on the top of the geomembrane is overlapped by nature, and the geotextile on the top of the geomembrane is welded by seam or warm air. Warm air welding is the first connection mode of anti-seepage geotextile, that is, the hot-air gun is used to heat the connection of two pieces of cloth in an instant to make part of it exceed the melting condition, and immediately apply the necessary external force to make them stick together. Under the condition that hot bonding is not allowed in cold and humid weather (rainy and snowy days), another method, suture connection method, should be adopted for geotextile, that is, multi thread suture connection should be carried out with special sewing machine, and surgical suture with chemical ultraviolet protection should be selected. The total width is 10cm when stitching, 20cm for natural lapping and 20cm for warm air welding. For the suture, the surgical suture with the same quality as the geotextile should be selected, and the material with stronger resistance to organic chemical damage and direct ultraviolet radiation should be selected.