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Geogrid construction method and engineering function

Author: Hou

Sep. 30, 2022

25 0 0

Tags: Construction & Real Estate

Geogrid is a major geosynthetic material with unique properties and efficacy compared with other geosynthetics. It is often used as a reinforcing material for reinforced soil structures or a reinforcing material for composite materials.

Classification characteristics

Geogrid is a major geosynthetic material. Geogrids are divided into four categories: plastic geogrids, steel-plastic geogrids, fiberglass geogrids and fiberglass polyester geogrids. Compared with other geosynthetics, it has unique properties and efficacy. Geogrids are often used as reinforcement for reinforced soil structures or as reinforcement for composite materials.

Engineering Applications

Soft soil foundation reinforcement, retaining wall and pavement crack resistance engineering of roads, railways, bridge abutments, approach roads, docks, dams, slag yards, etc.

Biaxial Plastic Geogrid.jpg

Geogrid for sale Engineering role:

1. High strength, small creep, adapt to various environmental soils, and can fully meet the use of tall retaining walls in high-grade highways.

2. It can effectively improve the interlocking and occlusion 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 grille, it has the characteristics of high strength, strong bearing capacity, anti-corrosion, anti-aging, large friction coefficient, uniform holes, convenient construction and long service life.

4. It is more suitable for deep-sea operations and reinforcement of embankments, and fundamentally solves the technical problems of low strength, poor corrosion resistance and short service life caused by long-term erosion of seawater for gabions made of other materials.

5. It can effectively avoid the construction damage caused by being crushed and damaged by the machine during the construction process.

Steel plastic geogrid

The steel-plastic grating is made of high-strength steel wire wrapped by high-density polyethylene into a high-strength strip, formed at right angles to the warp and weft of the plane, and formed by ultrasonic welding. The tension of the rib.

Construction points

Construction site: It is required to be compacted flat, horizontal, and clear of spikes and protrusions.

Grid laying: On a flat and compacted site, the main force direction (longitudinal) of the installed grid should be perpendicular to the direction of the embankment axis. The laying should be flat, without wrinkles, and as tight as possible. It should be fixed by inserting nails and earth-rock weight. The main stress direction of the grid should be full length without joints. The connection between the panels can be manually tied and overlapped, and the width of the overlap is not less than 10cm. If there are more than two layers of grilles, the layers should be staggered. After a large area is laid, the straightness should be adjusted as a whole. After filling a layer of soil, before rolling, the grille should be tightened manually or with equipment again, and the force should be uniform, so that the grille is in a state of tension and stress in the soil.

Selection of fillers: fillers should be selected according to design requirements. Practice has proved that except frozen soil, swamp soil, domestic garbage, chalk soil, diatomaceous earth can be used as filler. However, gravel soil and sand soil have stable mechanical properties and are less affected by water content, so they should be preferred. The particle size of the filler should not be greater than 15cm, and the gradation of the filler should be controlled to ensure the compaction weight.

Paving and compaction of filler: After the grid is laid and positioned, it should be filled with soil in time, and the exposure time should not exceed 48 hours. The flow operation method of backfilling while laying can also be adopted. First spread the filler on both ends, fix the grille, and then push it to the middle. The order of rolling is first on both sides and then in the middle. When rolling, the pressure roller cannot directly contact the reinforcement, and the uncompacted reinforced body generally does not allow vehicles to drive on it, so as to avoid the dislocation of the reinforcement. The layered compaction is 20-30cm. The degree of compaction must meet the design requirements, which is also the key to the success of reinforced soil engineering.

Waterproof and drainage measures: In reinforced soil engineering, drainage treatment must be done inside and outside the wall; foot protection should be done to prevent scouring; filtering and drainage measures should be set in the soil body, and geotextiles and permeable water should be set when necessary. tube (or blind ditch). Take the way of dredging the drainage, can not be blocked, otherwise there will be hidden dangers