Short fiber geotextile is a type of non-woven and industrial fabric that uses curled short fibers with a fiber fineness of 6-12 deniers and a length of 54-64mm as raw materials. It can generally be divided into polyester geotextile (PET) or polypropylene geotextile (PP) according to the material. The finished product is in the form of fabric, with a general width of 4-6 meters and a length of 50-100 meters.
Short fiber geotextile is made into a fabric shape through the production process of non-woven production equipment, including opening, combing, disorderly interweaving of short fibers, mesh laying (standardized entanglement and fixation), and needle punching.
Short wire geotextile is widely used in railway subgrade reinforcement, highway pavement maintenance, sports hall, dam protection, hydraulic construction isolation, tunnel, coastal mudflat, reclamation, environmental protection and other projects.

 

Product Specifications: According GB/T17638-1998 for Geotextile filter fabric

 

The functional role of the product
1. Isolation: Using polyester staple fiber needle punched geotextile to isolate building materials with different physical properties (such as particle size, distribution, consistency, and density), such as soil and sand particles, soil and concrete. To prevent the loss or mixing of two or more materials, maintain the overall structure and function of the materials, and enhance the load-bearing capacity of the structure.
2. Filtration (reverse filtration): When water flows from the fine soil layer into the coarse soil layer, polyester short fibers are used to puncture the geotextile with good breathability and permeability, allowing the water flow to pass through and effectively intercepting soil particles, fine sand, small stones, etc., to maintain the stability of soil and water engineering.
3. Drainage: Polyester short fiber needle punched geotextile has good water conductivity, which can form drainage channels inside the soil and discharge excess liquids and gases from the soil structure.
4. Reinforcement: Using polyester short fiber needle punched geotextile to enhance the tensile strength and deformation resistance of soil, improve the stability of building structures, and improve soil quality.
5. Protection: When water flows through the soil, it effectively spreads, transmits, or decomposes concentrated stress, preventing the soil from being damaged by external forces and protecting the soil.
6. Anti puncture: Combined with geomembrane to form a composite waterproof and anti-seepage material, it plays a role in preventing puncture.

Application areas of the product
(1) Reinforce the backfill of retaining walls or use panels to anchor retaining walls. Construct enclosed retaining walls or bridge piers.
(2) Strengthen the flexible pavement, repair cracks on the road, and prevent reflection cracks on the pavement.
(3) Enhance the stability of gravel slopes and reinforced soil to prevent soil erosion and freezing damage to the soil at low temperatures.
(4) The isolation layer between the ballast and the roadbed, or the isolation layer between the roadbed and the soft foundation.
(5) The isolation layer between artificial fill, stone or material fields and the foundation, and the isolation between different frozen soil layers. Filtering and reinforcement functions.
(6) The filter layer of the upstream dam surface of the ash storage dam or tailings dam, and the filter layer of the drainage system in the backfill soil of the retaining wall.
(7) The filter layer around the drainage pipe or gravel drainage ditch.
(8) The filter layer of water wells, relief wells, or inclined pressure pipes in hydraulic engineering.
(9) The geotextile isolation layer between highways, airports, railway tracks, and artificial rock piles and the foundation.
(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 or under the concrete protective surface in earth dams or embankments.
(12) Eliminate water seepage around the tunnel, reduce the external water pressure borne by the lining, and alleviate water seepage around various buildings.
(13) Drainage of artificial fill foundation for sports field foundation.
(14) Used to strengthen weak foundations in highways (including temporary roads), railways, embankments, earth rock dams, airports, sports fields, and other engineering projects.

Construction technology of the product
1. It is best to use mechanical installation for geotextile, but manual laying can also be used. When laying, use machinery or manpower to tighten and lay flat and tightly against the road surface. The fixator includes fixing nails and fixing iron sheets. Fixed nails should be made of cement or shot nails, with a length of 8-10cm; Fixed iron sheets can be made of iron strips with a thickness of 1mm and a width of 3mm.
2. The geotextile is horizontally overlapped by about 4-5cm. According to the paving direction, the rear end is pressed below the front end and bonded with hot asphalt or emulsified asphalt, and fixed with a fastener; The longitudinal overlap is also about 4-5cm, which can be directly bonded with oil. Excessive overlap can cause the interlayer at the overlap to become thicker, weaken the bonding force between the surface layer and the base layer, and easily lead to adverse effects such as bulging, detachment, and displacement of the surface layer. So, the parts that overlap too wide should be cut off.
3. Geotextile should be laid in a straight line as much as possible. When it is necessary to turn, cut open the fabric at the bend, overlap and lay it, and spray a layer of adhesive oil bonding. Efforts should be made to avoid wrinkling of the fabric. If wrinkles occur during laying (when the height of the wrinkles is greater than 2cm), they should be cut open and then overlapped in the laying direction, and handed over with adhesive oil.
4. After the geotextile is laid and the second coat of asphalt adhesive oil is sprayed and cooled for about 2 hours, an appropriate amount of fine yellow sand should be promptly sprinkled to prevent vehicles from lifting or damaging the geotextile due to wheel adhesive oil. The amount of fine sand used is about 1-2kg/m2.

 

 

https://www.qdlookingforward.com/