The opening of the filament geotextile opened to the entrance saw that it was sure to see through the laying and thermal connection of the filament geotextile, using geotextile pieces to repair the worn, the filament geotextile piece was more than the edge of the defect in multiple directions The minimum length is 200mm, and the thermal connection must be strictly controlled to ensure the tight bonding of the filament geotextile cloth and the geotextile, and there is no harm to the geotextile.

　　All geotextiles and seams must be inspected. Defective geotextiles and stitching must be clearly marked on the geotextile and repaired; the patch material used to fill the hole or fill the crack should be consistent with the geotextile. The durability of filament geotextile fibers was most affected by metal ions. The aging experimental plastic drainage panels were processed through differently treated geotextile fibers, and the influence of several major environmental factors on the life of filament geotextiles was discussed. The results show that the durability of filament geotextile fiber is most affected by metal ions, followed by water, which is less affected by acid and alkali. Under pressure, the durability of geotextile will also decrease.