Geotextiles have a variety of uses, their main functions include filtration, drainage, isolation, reinforcement, protection and impermeability.
As geotextiles have good water permeability and air permeability, placing them in the soil structure allows the liquid inside the soil to pass through and be discharged, and at the same time plays the role of soil retention, effectively preventing the loss of upstream soil particles, fine sand and small stones, preventing the destruction of the soil and keeping the safety and stability of the project.
2) Drainage role
Geotextile is good water-conducting material, the material itself as a drainage channel can bring together the water inside the soil structure in the geotextile, along with the material slowly discharging the soil.
The isolation role refers to the geotextile can isolate two materials with different properties, to avoid mixing with each other and losing the integrity of various materials and structural integrity. Such as laying in ordinary railway ballast and roadbed between the geotextile can effectively isolate the gravel ballast and soil roadbed.
4) Reinforcing effect
Geotextile is placed inside the soil as reinforcing material, or geotextile is combined with soil to form a composite body. Compared with unreinforced soil, the strength and deformation properties of reinforced composite soil are significantly improved.
5) Anti-seepage effect
The composite of geotextile and geomembrane etc. has a low water (gas) permeability, which can stop the flow and diffusion of liquid or gas and play the role of impermeability or inclusion.
6) Protective effect
Soil loss caused by rainfall impact and surface water runoff can be reduced by setting geotextile protection measures.
If geotextiles are laminated with geonets and laid on the surface of exposed soil on slopes, erosion by precipitation and surface runoff can be effectively avoided or mitigated.
Sediment fences made of geotextiles can filter out suspended soil particles in turbid runoff, etc.