Woven geotextile process
Geotextiles are textiles used in civil engineering. Narrowly defined geotextiles are permeable textiles used in civil engineering with civil engineering materials. Non-permeable textiles are called geomembranes, and geomembranes are generally obtained from textiles coated with asphalt or other coatings. Geotextiles in a broad sense include permeable geotextiles and impermeable geomembranes in civil engineering. The American Society for Testing and Materials (ASTM) defines geotextiles as "textiles that are used together with foundations, soil, rock, earth, or any other civil construction material and are part of man-made engineering, structures, and systems, called geotextiles. "Geotextile is the fourth kind of new building material used in geotechnical engineering after steel, cement and wood. It is in the fields of railway, highway, water conservancy, electric power, metallurgy, mining, construction, military, seaport, agriculture, etc. In the promotion and application, it has the functions of drainage, filtration, isolation, reinforcement, protection, anti-seepage and leakage prevention.
With the arrival of China's infrastructure construction peak, geotextiles are facing unprecedented opportunities, including long-term remediation of large rivers, farmland water conservancy construction, road construction, railway construction, airport and port construction, all of which are the development of geotextiles. Provide unlimited business opportunities. However, various projects have higher requirements on the width and various physical indexes of geotextiles. Because the performance of domestic shuttle looms is not stable enough, the width can not meet the needs of engineering construction, so production has certain difficulties. The projectile weaving machine has a large width, can be applied to various specifications of yarn manufacturing needs, meets the requirements of engineering, and has a fast speed, which can improve product output and low manufacturing cost. In addition, the brown frame of the gripper loom runs smoothly, the yarn tension is uniform, and the equipment is repaired and operated simply. In this way, the fabric can meet the design parameters and ensure the quality of the geotextile.
Texture of woven geotextile
There are many kinds of geotextiles, which can be divided into knitted geotextiles, non-woven geotextiles and woven geotextiles according to the production methods. The woven geotextile is a fabric woven by two sets of filaments or flat strips. The woven geotextile consists of a single layer of woven geotextile (also called geotextile cloth) and a double layer of geotextile (also called geotextile cloth). ) and woven anti-seepage cloth. China's woven geotextiles have been developed more than a decade later than non-woven geotextiles, and the current production technology is still in its infancy. The raw materials of woven geotextiles are mainly polypropylene flat woven fabrics, supplemented by nylon high-strength woven fabrics, fabrics with a width of more than 3800mm and specifications of 120-150g/m2, which are generally required for engineering. A fabric of 200-500 g/m2 is used.
Single layer woven geotextile
The single-layer woven geotextile is also called the geotechnical anti-filter cloth, which has the same structure as the general woven fabric. Most of the geo-filter fabrics adopt the plain weave structure, and the parameters such as raw materials, yarn count and density are designed according to the application engineering requirements. The product must ensure the warp and weft strength and water permeability. The production process is from polymer sliced particles → filament (or flat strip) warp yarn → particle storage → spinning (or film formation) → warping weaving → inspection and finishing, and finally the finished geotextile.
Double woven geotextile
The double-layer woven geotextile is also called the geotextile bag cloth. The geotextile bag is a double-layer fabric with four layers of structure, wherein the second and third strands of filaments or thick ropes are used as the thickness-controlled reinforcing ribs. The thickness of the bag can be thick and thin, and the shape can be large or small, and the shape is square, rectangular or other geometric shapes. The geotextile bag fabric is soft, in which the high-pressure pump is used to fill the fluid concrete or cement mortar, and after solidification, a high-strength rigid induration plate is formed, which can adapt to any complicated slope shape, terrain change and soil condition, and is used for large-area slope protection or work. The soil lining and the underwater lining, which can function as a template. The performance of woven geomembrane bag is mainly manifested in: 1 high strength, strong frost resistance (can withstand -40 ° C low temperature), can be pre-made into various geometric shapes of different sizes and thickness according to engineering requirements; 2 flexible during watering Large, flexible, can ensure that the block after molding is close to the ground, especially suitable for complex undulating terrain; 3 can be constructed underwater, without cofferdam or cutoff; 4 construction can be mechanized, fast progress, quality guaranteed; 5 machine Weaving mold bags also have anti-aging, anti-corrosion, anti-microbial, anti-breaking, puncture resistance, good wear resistance and reliable safety factor. It is a new textile geotechnical material for flood control and rescue.
Woven anti-seepage cloth
The woven anti-seepage cloth has two kinds of cloth and one cloth and one film. The coating PVC has a thickness of about 0.33mm, and has the characteristics of high impermeability, topping resistance and puncture resistance. It is a reservoir, a high dam, a tunnel, Special anti-seepage materials for construction and other projects.
Characteristics of woven geotextile
Woven geotextiles have advantages in high-strength applications such as reinforcement, reinforcement, and erosion protection. It is mainly used for the treatment of road and railway diseased areas, the improvement of soft soil sections, the slope protection of river embankments, dams and seaports, the construction of airport runways and artificial islands, etc., and its application range is quite extensive. The product has the following characteristics.
(1) The woven geotextile has a large tensile strength and modulus, and a small elongation at break, which has a good stress-strain relationship. (2) The warp and weft yarns in the woven geotextile are mutually pressed to prevent the deformation of the fabric when subjected to external force, so the structure of the woven geotextile is generally stable.
Original woven geotextiles are
