Staple fiber needle punched nonwoven geotextile

Geotextile has good physical and mechanical properties, and has a very broad application prospect in water conservancy and transportation projects. Its main application areas are as follows: 
Polypropylene geotextile can be widely used in hydropower, highways, railways, ports, airports, sports venues, tunnels, coastal mudflats, reclamation, environmental protection and other fields to play 

an isolation 
 

Geotextiles are almost used in high-grade highway construction in foreign countries, and they are also being used in China. The application of geotextile in highway engineering can effectively reduce rutting deformation, prevent and inhibit reflection cracks, and delay the fatigue damage of roads. In the construction of high-grade highways, the use of geotextiles can reduce the thickness of the gravel cushion, and make the slope of the highway steeper, reduce the amount of construction earthwork, and occupy less land. In 1981, China's railway department began to apply geotextiles to treat polypropylene geotextiles damaged by roadbed slurry for water conservancy project construction 
In the famous coastal defense project in the Netherlands, the world's largest adjustable tidal dam was safely used within 200 years due to the extensive use of geotextiles in the construction of huge dikes. The United States uses a large number of geotextiles for slope protection and reverse filtration in the upstream of earth-rock dams. According to the statistics of the National Bureau of Statistics, China's annual economic losses caused by floods are about 400 billion yuan. If geotextiles and geogrids are used in dam construction, strong embankments can be built to prevent economic losses caused by flooding. Polypropylene geotextile has played a good role in the berm project that is difficult to achieve with other materials.

function 
 

The good air permeability and water permeability of polypropylene geotextile are used to make water flow through, so as to effectively intercept sand loss. 
Polypropylene geotextile has good water conductivity, it can form a drainage channel inside the soil body, and discharge excess liquid and gas in the soil structure. 
Geotextiles are used to enhance the tensile strength and deformation resistance of the soil, and enhance the stability of the building structure, so as to improve the quality of the soil. 
Effectively diffuse, transmit or decompose concentrated stress to prevent the soil from being damaged by external force. 
Prevent the mixing between the upper and lower layers of sand, soil and concrete. 
The mesh is not easy to block, and the mesh structure formed by the amorphous fibrous tissue is strained and motil. 
High water permeability, under the pressure of soil and water, it can still maintain good water permeability. 
Corrosion-resistant, using polypropylene or polyester and other chemical fibers as raw materials, acid and alkali resistance, no corrosion, no moth-eaten, anti-oxidation. 
The construction is simple, light weight and easy to use.

Construction method 
1. Roll by hand; The cloth surface should be flat, and there should be an appropriate margin of deformation;

2. The installation of filament or staple yarn non-woven geotextile usually uses several methods of lapping, stitching and welding. The width of stitching and welding is generally more than 0.1m, and the width of lap is generally more than 0.2m. Non-woven geotextiles that may be exposed for a long time should be welded or stitched;

3. Stitching of non-woven geotextiles: all stitching should be carried out continuously (for example, point seams are not allowed); Before overlapping, the non-woven geotextile overlaps 150mm. The needle is less than 25 mm away from the edge (the exposed edge of the material). 
 Product specifications and performance parameters