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How to weld geotextile

  1. Use manual rolling; the cloth surface should be flat, with a proper allowance for deformation.
  2. The installation of filament or short-filament geotextile usually uses several methods such as lap, stitch, and welding. The width of stitching and welding is generally more than 0.1m, and the width of overlap is generally more than 0.2M. Geotextiles that may be exposed for a long time should be welded or stitched together.
  3. All stitching must be performed (for example, spot stitching is not allowed). Before overlapping, the geotextile must overlap at least 150mm. The least stitch distance from the selvage (the exposed edge of the material) is at least 25mm.
  4. The seams of the sewn geotextile include one-line and thread-locking chain stitching methods. The thread used for stitching is a resin material with the least tension of more than 60N and has chemical resistance and UV resistance equal to or beyond that of geotextile.
  5. Any “drop stitches” on the sewn geotextile must be re-sewn in the affected place.
  6. Corresponding measures must be taken to prevent soil, particulate matter, or foreign matter from entering the geotextile layer after installation.
  7. The lap joint of the cloth can be divided into natural lap joint, seam joint, or welding according to the terrain and use the function.
  8. During construction, the geotextile on the geomembrane is lapped, and the geotextile on the geomembrane is sewn or welded by hot air. Hot-air welding is the preferred connection method for filament geotextiles. that is, use a hot air gun to heat the joints of the two pieces of cloth at an instant high temperature to make part of them melted. Melt state, and immediately use a certain external force to make it bonded together. In the case of wet (rainy and snowy days) weather that cannot be bonded, geotextiles should adopt another method-suture connection method, that is, use a special sewing machine for double-line suture connection, and use chemical UV-resistant sutures.
  9. The least width of stitching is 10cm, the least width of natural overlap is 20cm, and the least width of hot air welding is 20cm.
  10. For seaming, use suture threads of the same quality as geotextiles, and use materials that are more resistant to chemical damage and ultraviolet light.
  11. After the geotextile is laid, the geomembrane must be laid after approval by the on-site supervision engineer. The geotextile on the geomembrane will be laid after the geomembrane is approved by Party A and the supervisor. Buried together with the geomembrane in the anchoring groove.
Geotextile weld
weld geotextile

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