Application of Filament Geotextiles in Railway Engineering

the most widely known is the use of filament geotextile on highways. In fact, it is also widely used in railway engineering. In addition, filament geotextile materials have always been well known in railway engineering applications. The specification of geotextile shall be determined on site, and the quality requirement shall not be less than 200g/㎡. The delivery certificate shall be inspected. The geotextile must be delivered into the warehouse, and shall not be exposed to the sun in the open air. The geotextile stored for more than 6 months shall not be used. The geotextile shall have no transverse joint, and the longitudinal overlapping length shall not be less than 1m.The laying shall be flat and properly relaxed. After laying the geotextile on the gravel layer, check whether the lap joint is dense. When pouring and tamping the plain concrete cushion, prevent the mortar from infiltrating into the gravel layer. During the pouring and tamping of the berth slab, check the drainage pipe section by section. Dredge and remove sundries at any time. Filament geotextile has always been our preferred material in waterproof and anti-seepage projects, because it is a permeable geosynthetics made of synthetic fibers through needle punching or weaving.
The finished product is in the form of cloth, with a general width of 2-6.2 meters and a weight of 180-670 g/㎡. At the same time, it has excellent filtering, isolation, reinforcement and protection, high tensile strength, good permeability, high temperature resistance, freezing resistance, aging resistance, corrosion resistance and other good performance characteristics. In addition, the filament geotextile itself has good fabric gaps and good adhesion, As the fiber is soft, it has certain tear resistance, anti-seepage membrane force and good deformation adaptability, as well as good plane drainage capacity. The soft surface with many gaps has a good friction coefficient, which can increase the adhesion of soil particles, prevent the loss of fine particles and remove excess water at the same time. The soft surface has a good protection ability. Therefore, the filament geotextile has been widely used in railway engineering, and has achieved the benefits of cost reduction and better quality. In recent years, filament geotextile is one of the high-end products produced from pure polyester raw materials. It is applied and constructed according to the needs of railway engineering, and the effect is recognized based on long-term use experience. Since the development of railway engineering with filament geotextile, China's railway industry has been developing at a high speed. High speed railway uses one of the indispensable materials in impermeable and waterproof geotextiles.