Plastic bidirectional grid is a main geosynthetic material of bidirectional geogrid. Compared with other geosynthetics, it has unique performance and efficacy. Two-way geogrids are often used as reinforcements for reinforced soil structures or composites. Geogrid is divided into four categories: plastic geogrid, steel-plastic geogrid, fiberglass geogrid and glass fiber polyester geogrid.
(1) Plastic two-way grille is a product of plastic geogrid
The plastic bidirectional grid is a square or rectangular polymer mesh formed by stretching. According to the different stretching direction during manufacture, it can be unidirectional stretching and bidirectional stretching. It punches holes on the polymer sheet (mostly polypropylene or high-density polyethylene) produced by extrusion, and then performs directional stretching under heating. The unidirectional stretch grid is only stretched along the length of the sheet, while the biaxial stretch grid is made by continuing to stretch the unidirectional stretched grid in the direction perpendicular to its length.
In the manufacture of the plastic plastic grid, the polymers of the polymer will be rearranged and oriented during the heating and extension process, which strengthens the bonding force between the molecular chains and achieves the purpose of improving its strength. Its elongation is only 10% to 15% of the original sheet. If anti-aging materials such as carbon black are added to the geogrid, it can make it have better durability such as acid resistance, alkali resistance, corrosion resistance and aging resistance.
The plastic bidirectional grid is made of high molecular polymer through the process of extrusion, forming and punching, and then stretched longitudinally and transversely. The material has great tensile strength in both longitudinal and transverse directions. This structure can also provide an ideal interlocking system for more effective force bearing and diffusion in the soil, which is suitable for large-area permanent bearing foundation
Purpose: Plastic two-way grille is suitable for all kinds of embankment and roadbed reinforcement, side slope protection, cave wall reinforcement, large airports, parking lots, terminal cargo yards and other permanent bearing foundation reinforcements.
1. Increase the bearing capacity of the road (foundation) and extend the service life of the road (foundation).
2. Prevent road (ground) surface collapse or cracks, and keep the ground beautiful and tidy.
3. The construction is convenient, time-saving, labor-saving, shortening the construction period and reducing maintenance costs.
4. Prevent cracks in the culvert.
5. Strengthen the soil slope to prevent soil erosion.
6. Reduce the thickness of cushion layer and save cost.
7. Support the stable green environment of the side slope grass planting mat.
8. It can replace metal mesh and used for false roof mesh in coal mine.
Construction method of plastic two-way grille:
When the plastic two-way grid is used for roadbed and road surface, excavate the foundation bed, set up a sand cushion (height difference not greater than 10cm), roll it into a platform, and lay the grid. The longitudinal axis should be consistent with the main force direction. Overlap 15-20cm, horizontal 10cm, tie the overlap with plastic tape, and fix it to the ground with U-shaped nails every 1.5-2m on the laid grid. The laid geogrid should be backfilled with earth material in time and laid The number of geogrid layers depends on technical requirements.