Polyester two way geogrid used in railway improves the service life of railway.

1. The two-way geogrid is used to strengthen the railway subgrade. The combination of synthetic materials and pavement materials can effectively distribute the load, prevent the loss of ballast and subgrade deformation, improve the stability of the subgrade, and bear more variable load.

2. For the protection of railway ballast, the loss of ballast is caused by train vibration and wind and rain, which is wrapped by two-way geogrid to prevent the loss of ballast and improve the stability of subgrade.

3. The two-way geogrid material for Railway Retaining Wall is used to strengthen the retaining wall on the railway side, such as platform and freight platform in the railway station, which can extend the service life and reduce the maintenance cost.

4. The two-way geogrid for railway slope protection is used for slope protection on both sides of the railway, which can prevent the stones and fine soil from sliding, improve the service life of the railway and reduce the maintenance cost.

The two-way geogrid has the functions of anti filtration, drainage, isolation, reinforcement, anti-seepage and protection, among which the reinforcement function has been applied more and more in recent years, and the application field has gradually expanded. The two-way geogrid is mainly used in highway, railway and other projects, but also gradually used in flood control embankment, cofferdam and inland river port wharf and other projects.

Grating, also known as steel grating, steel grating or grating plate, is welded by flat steel and torsional steel. The main purpose of grating is to rest platform, walkway, ditch cover and step plate. Also used in environmental protection equipment and sewage treatment, because of its advantages, it is widely used. The gap width between grid bars can be set according to the way of removing dirt and the requirements of water pump. Generally, the gap of manual cleaning grid is 16-25mm. The grid in front of the grit chamber or sedimentation tank is generally 15-30mm, with a maximum of 40mm. There are three kinds of commonly used mechanical slag cleaning equipment, namely, chain type, mobile type and wire rope traction type. According to the difference of grid spacing, grid can be divided into three types: coarse grid, medium grid and fine grid. According to the cleaning method of the grid, there are three ways: manual grid, mechanical grid and hydraulic grid. According to the different structural characteristics of the grid, it can be divided into grab rake type, circular type, arc type, rotary type, drum type, rotary type, tooth rake type and ladder type. The grid equipment is generally used on the inlet channel of sewage treatment or at the inlet of the sump of the lifting pump station. Its main function is to remove the larger suspended or floating objects in the sewage, so as to reduce the treatment load of the subsequent water treatment process and protect the water pump, pipeline, instrument, etc. When the amount of grid slag intercepted is greater than 0.2m3/d, mechanical slag removal is generally used; when the amount of grid slag is less than 0.2m3/d, manual slag removal or mechanical slag removal can be used. The application of grid has a wide range of applications in construction, design and decoration, sewage treatment, engineering applications and other fields.

Subgrade refers to the strip structure built as the pavement foundation according to the route location and certain technical requirements. Subgrade is a linear structure built with soil or stone. It bears its own weight of rock and soil, the gravity of the road surface, and the driving load transmitted from the road surface, which is an important part of the whole road structure.