1. High temperature resistance. The melting point of wholesale long fibre filament needle punched geotextile should generally not be lower than 170 ° C, preferably 200 ° C
In order to prevent shrinkage deformation at high temperatures during asphalt paving, and to protect the geotextile itself
Can be stable.
2. High tensile strength. The ultimate tensile strength should be greater than or equal to 8KN/m2, elongation at break
The rate is not less than 50%.
3. Uniformity is good. Geotextile is an anisotropic material, to ensure uniform strength, non-woven
The strength ratio of the geotextile in both directions is generally not more than 1.2.
4. Adsorption and permeability. Geotextiles require a uniform surface that absorbs, penetrates, and saturates evenly, allowing it to adhere well to the road surface. The geotextile acts as a protective layer for the geomembrane, so that the anti-seepage layer is protected from damage. In order to reduce ultraviolet radiation and increase anti-aging properties, it is best to use the embedding method.

In the construction, firstly, the sand surface or the clay with a smaller diameter should be used to level the base surface, and then the geomembrane is laid. The geomembrane should not be stretched too tightly, and the soil embedded in the soil at both ends is corrugated. Finally, a layer of about 10 cm is layered with fine sand or clay on the geomembrane. A 20-30cm block stone (or 砼 prefabricated block) is placed as an impact protection layer.

During construction, every effort should be made to avoid the stone directly on the geomembrane. It is best to carry out the construction of the protective layer while laying the film. The joint of the composite geomembrane and the surrounding structure shall be anchored by expansion bolts and steel strips. The joints shall be coated with emulsified asphalt (thickness 2mm) to prevent leakage.