geotextile

Geotextiles are also known as staple fiber non-woven geotextiles, staple fiber geotextiles, and staple fiber needle-punched nonwoven geotextiles. Geotextiles are a new type of construction material used in civil engineering. The equipment and process are laid out into a net shape, and then different fibers are intertwined with each other through acupuncture and other processes, and the entanglement and fixation make the fabric normalized, making the fabric soft, plump, thick and stiff, so as to achieve different thicknesses to meet the requirements of use , according to the length of the wire, it is divided into filament geotextile or short filament geotextile. The tensile strength of filament is higher than that of short filament. Because the fiber is soft and has a certain tear resistance, it also has a good main function: anti Filtration, water filtration, isolation, protection and reinforcement. Specifications from 100 grams per square meter to 800 grams per square meter. The main material is polyester fiber or polypropylene fiber, which has excellent water permeability, filterability, durability and deformation adaptability, and also has good plane drainage ability.

Geotextile properties and functions

1. It does not contain chemical additives, and it is an environmentally friendly building material without heat treatment.

2. It has good mechanical properties, good water permeability, and can resist corrosion and aging

3. It has strong anti-burial and corrosion resistance, fluffy structure and good drainage performance

4. It has good friction coefficient and tensile strength, and has geo-reinforcement properties

5. It has the functions of isolation, anti-filtration, drainage, protection, stabilization and strengthening

6. It can adapt to the uneven base layer, can resist the damage of construction external force, and has small creep.

7. Good overall continuity, light weight and convenient construction

8. It is a water-permeable material, so it has a good anti-filtration isolation function and strong puncture resistance, so it has a good protective performance

9. Use the good air permeability and water permeability of geotextiles to make water flow through, which can prevent the loss of retained sand;

10. 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;

11. The use of geotextiles to enhance the tensile strength and anti-deformation ability of the soil, enhance the stability of the building structure, and improve the quality of the soil;

12. Effectively diffuse, transfer or decompose concentrated stress to prevent soil from being damaged by external force;

13. Prevent the mixing between the upper and lower sand, soil and concrete;

14. The mesh is not easy to be blocked. The mesh structure formed by the amorphous fibrous tissue has strain and mobility.

15. High water permeability Under the pressure of soil and water, it can still maintain good water permeability;

16. Corrosion resistance: Using polypropylene or polyester and other chemical fibers as raw materials, it is resistant to acid and alkali, no corrosion, no moth-eaten, and anti-oxidation;

17. Advantages Light weight, simple construction, easy to use, shorten the construction period, improve economic benefits, and extend the application field of geotextiles for engineering use

Geotextile application field

(1) Used as reinforcement in backfilling of retaining walls, or as panels for anchoring retaining walls. Construction of wrapped retaining walls or abutments.

(2) Reinforce the flexible pavement, repair the cracks on the road, and prevent the pavement from reflecting cracks.

(3) Increase the stability of gravel slopes and reinforced soil to prevent soil erosion and freezing damage of soil at low temperatures

(4) The isolation layer between the road ballast and the subgrade, or the isolation layer between the subgrade and the soft subgrade.

(5) The isolation layer between artificial fill, rockfill or material field and foundation, and isolation between different frozen soil layers. Anti-filtration and reinforcement.

(6) The filter layer of the upstream dam surface in the initial stage of the ash storage dam or tailings dam, and the filter layer of the drainage system in the backfill of the retaining wall.

(7) The filter layer around the drainage underdrain or around the gravel drainage underdrain.

(8) The filter layer of water wells, pressure relief wells or oblique pipes in water conservancy projects.

(9) Insulation layer of geotextiles between roads, airports, railway tracks and artificial rockfills and foundations

(10) Vertical or horizontal drainage inside the earth dam, buried in the soil to dissipate pore water pressure.

(11) Drainage behind the anti-seepage geomembrane in earth dams or earth embankments or under the concrete cover.

(12) Eliminate the seepage around the tunnel, reduce the external water pressure on the lining and seepage around the buildings

(13) Drainage of artificial ground foundation sports ground.

(14) Roads (including temporary roads), railways, embankments, earth-rock dams, airports, sports grounds, etc., are used to strengthen weak foundations.