Geogrid is a very important geosynthetic material that plays an irreplaceable role in improving the safety and durability of civil engineering structures. With the continuous progress of technology and the growing market demand, the application scope of geogrids will become increasingly widespread, injecting new impetus into the development of civil engineering.

According to different materials and processes, geogrids can be divided into various types, such as unidirectional geogrids, bidirectional geogrids, three-dimensional geogrids, and fiberglass geogrids. Each type of geogrid has its specific application areas and advantages. For example, unidirectional geogrids are mainly suitable for engineering projects that require enhancing the unidirectional stability of soil; Bidirectional and three-dimensional geogrids can provide reinforcement effects in multiple directions, making them suitable for projects that require comprehensive reinforcement.

Geogrid is a flat mesh structure material made by special processing of polymer materials. It has excellent characteristics such as high strength, high modulus, corrosion resistance, aging resistance, light weight, and easy construction. The main function of geogrids is to enhance the overall stability of soil, improve the bearing capacity and deformation resistance of soil through their grid structure.

Biaxially stretched plastic geogrids are made from polypropylene (PP) or polyethylene (PE) as raw materials through plasticization, extrusion of sheets, punching, heating, longitudinal and transverse stretching. The effectiveness of using bidirectional geogrids is closely related to the treatment of the paved road surface. Before paving, it is necessary to thoroughly clean substances on the road surface that may affect the bonding strength between the geogrid and the underlying layer, such as grease, paint, sealing materials, water stains, dirt, etc., to ensure that the paving surface is clean and dry. Excavate the foundation bed, set up a sand cushion layer (with a height difference of no more than 10cm), roll it into a platform, lay a grid, and the longitudinal axis should be consistent with the main force direction. The longitudinal overlap should be 15-20cm, and the transverse overlap should be 10cm. Use plastic tape to tie and overlap. When laying the grid, fix it on the ground with U-shaped nails every 1.5-2m. The laid geogrid should be backfilled in a timely manner, and the number of layers should be determined according to technical requirements.

The main characteristic of unidirectional PP geogrid is unidirectional tension, which has high tensile strength and modulus, and is suitable for engineering that needs to enhance the unidirectional stability of soil. In road construction, it can be used for roadbed reinforcement, pavement crack prevention, and other aspects; In slope engineering, it can effectively prevent slope landslides and collapses.

The bidirectional PP geogrid forms a grid like structure through bidirectional stretching, and has good tensile strength and rigidity in both vertical and horizontal directions. This type of grille is suitable for projects that require comprehensive reinforcement, such as road and railway subgrade reinforcement, embankment, retaining wall and other infrastructure construction. The connection method of hot melt welding also improves construction efficiency and overall stability of the project.

The three-dimensional PP geogrid has a three-dimensional structure, higher stiffness and strength, and can more effectively disperse and withstand soil loads. In soil reinforcement and protection engineering, three-dimensional geogrids can significantly enhance the tensile and shear strength of soil, prevent lateral displacement and settlement of soil. It is widely used in fields such as roads, railways, water conservancy, and environmental engineering.