Steel-plastic composite geogrid is made of high-strength steel wire (or other fibers), specially treated, polyethylene (PE) or polypropylene (PP) and other additives, which are extruded into composite high-strength tension strip, and the surface of which is roughly corrugated, is high-strength reinforced geotechnical strip. Thus, the single strip is formed by welding its joints with special strengthening bonding fusion welding technology, and it is also a reinforced geogrid, which is made up of longitudinal and transverse layouts with certain spacing or clamping arrangement.
Characteristic of new material steel-plastic composite geogrid:
1. The tension of steel-plastic composite grids is borne by high strength steel wires braided by warp and weft, which produces extremely high tensile modulus under low strain capacity. The longitudinal and transverse ribs play a synergistic role, giving full play to the interlocking effect of grids on soil.
2. The steel wire of the longitudinal and transverse ribs of the steel-plastic composite grids is woven into a net in warp and weft, and the outer wrapping layer is formed once. The steel wire can coordinate with the outer wrapping layer and the elongation of the damage is very low (not more than 3%). The main stress unit of steel-plastic composite geogrid is steel wire, and its creep is very low.
3. Through the treatment of plastic surface in the production process, the rough patterns are pressed to enhance the roughness of the grille surface and improve the friction coefficient between the steel-plastic composite geogrid and the soil.
4. The width of the steel-plastic composite grille can reach 6m, which achieves high efficiency and economic reinforcement effect.
5. The high density polyethylene (HDPE) used in the steel-plastic composite grid can ensure that it will not be eroded by acid-base or salt solution or oil at room temperature, and will not be damaged by water dissolution or microorganisms. At the same time, the polymer properties of polyethylene are enough to resist the aging caused by ultraviolet radiation. The longitudinal and transverse ribs cooperate with each other after the grille is loaded, and the joint will not be cracked or damaged. In practical engineering, after compaction of filler, it is not corroded by ultraviolet light and oxygen, so it can completely meet the requirements of permanent engineering construction.
The engineering application fields of steel-plastic geogrid include soft soil foundation reinforcement of highway, railway, abutment, approach, wharf, dam, slag yard, anti-crack engineering of retaining wall and pavement, etc.
Engineering application characteristics of steel-plastic geogrid:
1. High strength, low creep, suitable for all kinds of environmental soil, can fully meet the use of high-grade highway retaining walls.
2. It can effectively improve the interlocking and biting effect of the reinforced bearing surface, greatly enhance the bearing capacity of the foundation, effectively restrain the lateral displacement of the soil, and enhance the stability of the foundation.
3. Compared with the traditional grid, it has the characteristics of high strength, strong bearing capacity, anti-corrosion, anti-aging, large friction coefficient, uniform hole, convenient construction and long service life.
4. It is more suitable for deep-sea operation and embankment reinforcement, and fundamentally solves the technical problems of low strength, poor corrosion resistance and short service life caused by long-term erosion of other materials as stone cages by sea water.
5. It can effectively avoid the construction damage caused by the crushing and destruction of the machine tools in the construction process.
