Woven geotextile process
Geotextiles are used in civil engineering textiles. The narrow geotextiles are permeable textiles used in civil engineering together with civil engineering materials. The impermeable textile is called geomembrane, geomembrane is generally coated with asphalt textile or other coating obtained. Geotextiles in a broad sense include geo-permeable geotextiles and impermeable geomembranes in civil engineering. The American Society for Testing and Materials (ASTM) defines geotextiles as "all geotextiles that are used with foundations, soils, rocks, earth, or any other civil material and are part of man-made engineering, structures, and systems. Geotextile is the fourth new type of building material used in geotechnical engineering after steel, cement and wood. It is widely used in geotechnical engineering such as railway, highway, water conservancy, electric power, metallurgy, mining, construction, military industry, seaport and agriculture In the promotion and application, with drainage, filtration, isolation, reinforcement, protection, seepage, leakproof and so on.
With the advent of the peak infrastructure in China, geotextiles are facing unprecedented opportunities, including the long-term reform of large rivers, farmland and water conservancy construction, road construction, railway construction, airport and port construction, all of which are for the development of geotextiles Offers unlimited business opportunities. However, the geotechnical fabrics of various widths and various physical indexes have higher requirements. Due to the unstable performance of domestic shuttle looms and the small width, they can not meet the needs of project construction. Therefore, the production has a certain degree of difficulty. The gripper loom has a large width, can be used for a variety of yarn manufacturing needs to meet the requirements of the project, and speed, can improve product yield, lower manufacturing costs. Plus the film weaving machine Brown frame smooth operation, uniform yarn tension, equipment maintenance, easy to operate. This fabric can meet the design requirements of the parameters to ensure the quality of geotextiles.
Performance of Woven geotextile
There are many kinds of geotextile, according to production methods can be divided into knitted geotextile, non-woven geotextile and woven geotextile, and so on. One of the woven geotextile woven by two groups of filament or flat woven into a single species of woven geotextile (also known as geotextile filter cloth), double geotextile (also known as geotextile bag cloth ) And woven impermeable cloth. China's woven geotextile fabric than non-woven geotextile development more than ten years later, the current production technology is still in its infancy. Woven geotextile raw materials mainly polypropylene flat silk cloth, nylon yarn, supplemented by high-strength woven fabrics, width more than 3800mm, specifications for the 120-150g / m2 fabric, the general requirements of the project may be high Use 200-500g / m2 of fabric.
Single-layer Woven geotextile
Single-layer woven geotextile, also known as geotextile filter cloth, and the general structure of the same fabric, geotextile filter cloth most of the plain weave, in accordance with the requirements of engineering design materials, yarn count, density and other parameters. Products to ensure that the latitude and longitude and water permeability. The production process from the polymer slice particles → filament (or flat bar) warp → particle storage → spinning (or filming) → warping and weaving → inspection finishing, and finally geotextile products.
Double woven geotextiles
Double-layer woven geotextile, also known as geotextile bags, geotextile bags are double-layer fabric, four-layer organization, of which the second third with the joint filament or thick rope as the thickness control of reinforcement. Thickness of the bag can be thick and thin, forming can be large and small, the shape of a square, rectangular or other geometric shapes. Geotextile bag fabric soft, which uses high pressure pump filled with fluid concrete or cement mortar, after the formation of high-strength rigid hardened plate solidification, can adapt to any complex slope, topography and soil conditions for large-scale slope protection or for Soil lining and underwater protection, it can play the role of the template. The performance of woven geotextile bags are mainly as follows: ① high strength, strong frost resistance (-40 ℃ low temperature), according to the project requirements prefabricated into different sizes, different thickness of the various geometries; ② water flexibility Large, flexible, to ensure that the molded block close to the ground, especially for complex ups and downs terrain; ③ can be underwater construction, without cofferdam or cut off; ④ construction mechanization, fast, quality assurance; ⑤ machine Weaving geotextile bag also anti-aging, anti-corrosion, anti-microbial, anti-bursting, puncture resistance, good wear resistance and safety factor and other properties. Is flood control, rescue of new textile geotextile material.
Woven impermeable cloth
Woven impermeable cloth has two cloth a film and a cloth a film two, coating thickness of about 0.33mm PVC, with anti-seepage strength, resistance to bursting, puncture resistant properties of reservoirs, dams, tunnels, Construction and other works of special impermeable material.
Characteristics of woven geotextiles
Woven geotextile reinforcement, enhanced, anti-erosion and other high-strength use has advantages. It is mainly used for the treatment of road and railway disease lots, the improvement of loose soil and the reinforcement of slope protection of embankments, dams and harbors, as well as the construction of airport runways and artificial islands. Its application scope is quite wide. Products have the following characteristics.
(1) Woven geotextile tensile strength and modulus larger, smaller elongation, it has a good stress-strain relationship. (2) Woven geotextile by the weft yarn squeeze each other to prevent the deformation of the fabric when subjected to external forces, so the structure of woven geotextiles are generally more stable.
Had to see the woven geotextil
