The geotextile has a significant isolation effect, which can effectively prevent the road surface from tumbling and muddy, and has the reinforcing effect and the stress diffusion effect, which greatly improves the stability of the wet soft roadbed.
Geotextiles are characterized by high strength, corrosion resistance and good water permeability. Their functions are mainly in filtration, isolation, reinforcement, protection, etc.
China geotextile manufacturers
Classification of geotextiles:
1. Different raw materials: can be divided into polyester geotextile, polypropylene geotextile, etc.;
2, the difference of indicators: can be divided into short silk geotextile, filament geotextile, geotextile cloth, woven fabric, woven fabric, etc.;
3. The different production processes can be divided into needle-punched non-woven geotextiles and woven geotextiles;
Geotextile, polyester staple fiber needled geotextile is a widely used geosynthetic material. It is widely used in the reinforcement of railway subgrade, the maintenance of road pavement, the protection of sports halls, dams, the isolation of hydraulic structures, burrowing, beach coating, cofferdams, environmental protection and other projects.
Geotextile laying method:
Use artificial rolling, the cloth surface should be flat, and the deformation allowance should be left as appropriate.
The installation of filament or short geotextiles is usually done by lap joints, stitching and welding.
The width of the stitching and welding is generally above, and the overlap width is generally above. Geotextiles that may be exposed for a long time should be welded or stitched.
Stitching of geotextiles: All stitching must be done continuously (for example, point stitching is not allowed). Geotextiles must overlap a minimum of 150 mm before overlapping. The minimum stitch distance is at least 25 mm from the selvedge (the exposed edge of the material).
Filter layer function: Geotextile fabric has good gas permeability, can effectively retain soil, yellow sand, small stone and filter out water flow, and maintain the stability of earth and stone engineering.
Drainage: Non-woven geotextile fabric has good water-conducting properties. It can be used to form drainage channels inside the soil and discharge excess water inside the soil structure.
There are many other reasons for the application of geotextiles in highway paving. For example, the thickness of the product is suitable, and it is easy to combine with the asphalt pavement. When combined with the adhesive layer oil, it forms a separating layer, which has the functions of waterproofing and heat preservation. The surface is rough and not easy to slide.
When laying, the surface is specially treated and the rough side is facing upwards, increasing the friction coefficient, increasing the friction coefficient, increasing the bonding force of the surface layer, preventing the wheel from being rolled up and destroyed during construction, and suppressing the vehicle and the paver in the cloth. The phenomenon of slipping on these sides makes these non-woven geotextiles a good helper in road maintenance.
Chinese geotextile manufacturers said that in the construction of geotextiles, the geotextiles on the geomembrane are naturally lapped, and the geotextiles on the geomembrane are seamed or hot-air welded.
Hot air welding is a method of connecting the filament geotextiles, that is, the connection of the two pieces of cloth with a hot air is instantaneously heated at a high temperature to partially melt the state, and immediately use a certain external force to firmly bond them together.
In the case of wet (rainy and snowy) weather, the hot-adhesive connection is not possible. The geotextile should adopt another method, a suture connection method, that is, a double-threaded suture connection with a special sewing machine, and a chemical-resistant ultraviolet suture is used.
The filament spunbonded needle-punched nonwoven geotextile is made of polyester chips, which are melted and plasticized by high temperature, punched into a net, and fixed by needle punching.
China geotextile
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Post time: Jul-13-2019