Structural Characteristics of Plastic Grids

Plastic grids are made by extruding polyethylene or polypropylene into sheets, then stamping out regular mesh patterns to form plastic mesh. The sheets are stretched under controlled heating to align and order the disordered long-chain molecules, thereby improving the polymer's tensile strength and stiffness. Its main structural features are:

1. Reinforcing the subgrade can effectively distribute and diffuse loads, improving the stability and bearing capacity of the subgrade and extending its service life. The mesh structure of the plastic grid significantly disperses the stress exerted by the medium in contact with it. When grids are added to media such as soil, the medium relies on the interfaces between itself to bear pressure, while also transferring stress to the grid through interlocking with the grid mesh. Its unique mesh structure plays a role in stress dispersion, enhancing the foundation's bearing capacity and increasing the diffusion angle.

2. It can withstand greater cyclic loads and prevent subgrade deformation and cracking caused by loss of subgrade materials. The ribs of the plastic grid form strong interlocking with the particles of the medium, limiting lateral displacement of the medium. With a high friction coefficient with gravel, the medium particles can embed well into the grid mesh after rolling, forming a sturdy platform with certain flexibility and evenly distributing loads.

3. When the plastic grid is biaxially stretched, it forms a biaxial grid with uniform longitudinal and transverse strength, high tensile strength, high planar torsional modulus, good creep resistance, stable chemical properties, good toughness and resistance, corrosion resistance, strong interlocking with particles, and high mechanical damage resistance and durability.

4. Under the same axle load, achieving the same effect can reduce fill thickness by 30%-40%. When using geogrids for reinforcement, the subgrade with the same thickness can bear more than 3.5 times the load.