Why can geotextile filter water?

Release time:

2024-10-10

Geotextile is made of synthetic fiber materials by weaving or needle punching. This structure makes the geotextile have a large number of fine pores to ensure that it can allow water to flow through while effectively blocking soil particles.

Why can geotextile filter water?

The reason why geotextile can filter water is mainly due to its unique physical structure and material properties. The following is a detailed explanation of the water filtration principle of geotextile:
1. Physical structure
Geotextile is made of synthetic fiber materials (such as polyester staple fiber) through weaving or needle punching. This structure makes the geotextile have a large number of fine pores, the size and distribution of which are carefully designed to ensure that it can both allow water to pass through and effectively block soil particles.
2. Material properties
Water permeability: As a high-quality anti-seepage material, geotextile has good water permeability. This means that when water flows through geotextile, it can pass through its pores smoothly without being hindered.
Breathability: In addition to water permeability, geotextile also has good breathability. This helps to maintain air circulation between the soil and the geotextile and prevents the soil from losing its breathability due to long-term immersion in water.
Sieving effect: The fine pores of the geotextile play a sieving role. When water flows through, larger soil particles are blocked on the surface of the geotextile, while small water flows can continue to flow through the pores. This sieving effect effectively prevents the loss and scouring of soil particles.
3. Water filtration principle
Water flow: When water flows from the fine soil layer to the coarse soil layer, the geotextile can allow water to flow through its pores without blocking the water flow.
Soil particle blocking: At the same time, the sieving effect of the geotextile can block larger soil particles and prevent them from being lost with the water flow. This helps to maintain the stability and integrity of the soil structure.
Regulating water flow: Geotextiles can also regulate the infiltration and drainage speed of water flow, achieve control of infiltration water volume and uniform distribution of drainage. In anti-seepage projects, geotextiles can effectively reduce the amount of infiltration water and prevent the loss of water in the soil; in drainage projects, it can help drain excess water and maintain the appropriate humidity of the soil.

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