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.

In civil engineering, geogrids are widely used in various fields, including but not limited to road construction, railway engineering, water conservancy engineering, environmental engineering, foundation treatment, and slope protection. By laying it on the surface or inside of the soil that needs to be reinforced, geogrids can effectively disperse and transmit loads, limit lateral displacement and settlement of the soil, and thereby enhance the overall stability and durability of the soil.

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.

PP geogrid, also known as polypropylene geogrid, is a geosynthetic material made from polypropylene material through special processes. Thanks to its excellent physical properties and wide range of applications, PP geogrids play a crucial role in the field of civil engineering. This article will provide a detailed introduction to the characteristics, classification, application, and importance of PP geogrids in engineering.