The Role of Geotextiles

The role of geotextiles：

1.Isolate

Geotextiles can be used to isolate building materials with different physical properties, such as soil and sand, soil and concrete. It can make two or more materials do not lose, do not mix, maintain the overall structure and function of the material, so as to strengthen the carrying capacity of the structure.

2.Filtration (backfiltration)

When water flows from the fine soil layer into the coarse soil layer, the air permeability and water permeability of the geotextile allow water to pass through, and effectively trap soil particles, fine sand, small stones, etc., to maintain the stability of soil and water engineering.

3.Drain water

Geotextile has good water conductivity, can form a drainage channel inside the soil, the excess liquid and gas in the soil structure out.

4.Reinforcing

By enhancing the tensile strength and deformation resistance of soil, geotextile can improve the stability of building structure and improve the quality of soil.

5.Defense

Geotextile can effectively disperse, transfer or decompose concentrated stress, prevent soil from being damaged by external force, and play a role in protecting soil.

6.Puncture proof

When combined with geomembrane, geotextile can play a role in preventing puncture and form a composite waterproof and impermeable material together with geomembrane.

7.Reduced binding power

In some cases, geotextile can reduce the bonding force between the overlay layer and the old concrete pavement layer, and reduce the large tensile strain of the overlay layer, so as to relieve the stress concentration at the joint crack and delay the generation of reflection cracks.

8.Stress absorption

Geotextile can also play the role of stress absorption sandwich, the reflected crack stress from the vertical direction to the horizontal direction, and make the stress spread to a wider range, enhance the overall tensile strength of asphalt concrete

The application of geotextiles：

1.Hydraulic engineering:

Dam and slope protection filtration, channel isolation, seepage prevention.

2.Traffic engineering: 

Highway, railway, airport runway foundation isolation, reverse filtration, drainage, slope, retaining wall and pavement reinforcement, drainage.             

3.Port engineering: 

Soft foundation treatment, beach embankment, harbour pier and breakwater reinforcement, drainage.

4.Environmental protection projects:

 Landfills, sewage treatment plants, hazardous waste disposal sites.

5.Municipal works: 

Underground pipes, inspection Wells, rainwater collection systems.

6.Agricultural engineering:

 Land regulation, farmland irrigation, drainage system.

7.Mining engineering: 

Mine roadway support, tailings reservoir seepage prevention.

8.Landscaping:

Ecological slope protection, vegetation restoration, landscape water management.

9.Tunnel engineering:

 Tunnel lining, invert, drainage system.

10.Marine engineering:

 Coastal protection, submarine pipeline protection, offshore oil platforms.