Geotextile construction method

2019-07-09

Geotextile construction method

 Tools/raw materials 

 Various types of geotextiles

 Method / step 

 

1. Roll it by hand; the cloth surface should be flat and the deformation allowance should be left. 


2. The installation of filament or short-staple geotextiles is usually done by lap joints, stitching and welding. The width of the stitching and welding is generally 0.1 m or more, and the overlap width is generally 0.2 M or more. Geotextiles that may be exposed for a long time should be welded or stitched. 


3. All stitching must be done continuously (for example, point stitching is not allowed). Geotextiles must overlap a minimum of 150 mm before overlapping. The minimum stitch distance is at least 25 mm from the selvedge (the exposed edge of the material). 


4, the seam of the geotextile is most including the 1 line and the line lock chain stitching method. (Purchase geotextile products please go to www.geofantex.com) The thread used for sewing should be a resin material with a minimum tension of more than 60N, and has chemical resistance and UV resistance comparable to or exceeds that of geotextile. 


5. Any "leakage needle" on the sewed geotextile must be re-stitched in the affected area. 

 

6. Corresponding measures must be taken to prevent soil, particulate matter or foreign matter from entering the geotextile 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 the function of use. 

 

8. During the construction, the geotextile on the geomembrane is naturally lapped, and the geotextile of the geomembrane upper layer is seamed or hot-air welded. Hot air welding is the preferred method of joining the filament geotextiles, that is, the hot air gun is used to instantaneously heat the joint of the two pieces of cloth to make the part reach the molten state, and immediately use a certain external force to firmly bond it. together. (Purchase geotextile products please go to www.geofantex.com) In the case of wet (rainy and snowy weather) weather can not be thermally bonded, geotextile should take another method - suture connection method, that is, using a special sewing machine for double line Sutures are attached and a chemical-resistant UV suture is used. 

 

9. The minimum width is 10cm when stitching, the minimum width is 20cm when natural lap joint, and the minimum width is 20cm when hot air welding. 

10. For seaming, the same suture should be used with the same quality as the geotextile. The suture should be made of a material resistant to chemical damage and ultraviolet light.

 

11. After the geotextile is laid, the geomembrane is laid by the on-site supervision engineer. The geomembrane on the geomembrane is laid on the same as the geomembrane by the party and the supervisor. The upper and lower layers of the geotextile should be placed in the anchorage groove. It is buried in the anchoring groove together with the geomembrane.


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