Geotextile is made of non-woven fabric. It is mainly used to strengthen the foundation. Geomembrane is made of high-density polyethylene, and it is mainly used to prevent seepage. The connection between the two is composite geomembrane, which is divided into one cloth, one membrane and two cloth, one membrane, with stronger anti-seepage function.

Geotextile, also known as geotextile, is a kind of permeable geotextile material made by needling or weaving the constituent fibers. The products are cloth like, usually 4-6 meters wide and 50-100 meters long. Geotextile is divided into woven geotextile and non-woven geotextile

Geotextile has excellent filtration, drainage, barrier, reinforcement, anti-seepage and protection effects. It has light weight, high tensile strength, good permeability, high temperature resistance, freezing resistance, aging resistance and corrosion resistance. The geomembrane at the construction site is made of plastic film as the anti-seepage base material and non-woven fabric, Its impervious function mainly depends on the impervious function of plastic film.

At present, PVC, PE and EVA are the main plastic films used for anti-seepage at home and abroad. They are a kind of polymer chemical flexible materials with small proportion, strong extensibility, high habit of deformation, corrosion resistance, low temperature resistance and good frost resistance.

The primary mechanism is that the impermeability of plastic film is used to separate the leakage channel of earth dam, and the water pressure and deformation of dam body are accepted with its larger tensile strength and elongation rate; the non-woven fabric is also a kind of short polymer fiber chemical data, which has high tensile strength and elongation after acupuncture or hot sticking forming, and it is connected with plastic film, It not only increases the tensile strength and puncture resistance of the plastic film, but also increases the friction coefficient of the touch surface due to the rough surface of the non-woven fabric, which is conducive to the stability of the composite geomembrane and the protective layer. Together, they have good corrosion resistance to bacteria and chemicals, and are not afraid of the corrosion of acids, alkalis and salts.

The use scale of geotextile and geomembrane is not the same. Geotextile has the effect of strengthening, barrier layering, filtering, drainage and safety in engineering. Geomembrane is mainly used in projects with high impervious requirements, such as seepage prevention, barrier, reinforcement, crack prevention, reinforcement, horizontal drainage, etc. in engineering construction. Both of them can have their own effects and can be combined to show their respective interests