Geogrids Flat geogrid
A flat geogrid is a grid of polymeric or inorganic materials with nodular bulges. Hard edges of the cells firmly wedge inert materials and reinforce the layers of the road structure.
Geogrids are made by stretching extruded polymers or by interlacing complex fibers. It is used in road, rail, industrial construction. Purpose, functions performed depend on the raw materials used.
"Slavros" NPK produces biaxial and monoaxial geogrid for 17 years. We offer products of standard size and technical specifications from stock at manufacturer prices. By request we will make any models with the required durability, the geometrical sizes.
Types of flat geogrid
Types of flat geogrid Road geogrids differ in the material of manufacture, the configuration of cells. The raw material base of NPK Slavros consists of polymers and inorganic elements:
- basalt fiber.
By geometry, geosynthetic lattices are classified into biaxial and monoaxial ones. The former have square cells and high resistance to tearing in all directions. But their scope is horizontal surfaces. The second configuration is a longitudinal oriented rectangle.
The price of a geogrid depends on the size of the grid, the size of the surfase and the material of manufacture. The choice of geogrid depends on the operating conditions. Polypropylene materials are laid on roads that are not intended for the movement of heavy machinery. Polyester lattices are destroyed in an alkaline environment - lime, cement.
Flat geogrid application
The main purpose of geogrids is road, rail, industrial construction in all climatic regions. A biaxially oriented geogrid increases the strength of structures on swampy, shaky, frozen soils. The working temperature range (-60 ÷ + 60 ° C) allows stacking geosynthetics in all weather conditions, reducing the time of construction work.
The functions of the biaxial lattice during creating new and renovating, repairing old objects
- reinforcement of structural layers of asphalt concrete, concrete and reinforced concrete slabs;
- reinforcement of joints in the expansion of roads;
- substrate for temporary, technological roads;
- separation of bulk formations on problem soils;
- reduction and distribution of the load on the soft base under the foundations
Reinforcement of asphalt pavements increases the elasticity of the roadway, redistributes pressure. This prevents cracks, rutting, reduces fatigue pavement.
The geogrid is used during restoring the roadway by “patching” method, as well as after repairing underground utilities.
In addition to road construction, a bi-axial flat geogrid is used in the construction of other structures:
- take-off and runways, aircraft parking;
- parking lots of heavy machinery, heavy trucks;
- driveways of heavy machinery;
- customs, warehouse terminals;
- platforms for port cranes;
- parking lots;
- industrial floors.
Monoaxial polymer mesh in industry is used to strengthen the earth planes with an angle of up to 90o:
- coastal bridge supports;
- retaining walls;
- slopes of cars and railway roads;
- strengthening of any mounds.
In country houses, in country houses, a onedimensional grid is arranged in a parking lot, garden paths, barbecue areas and barbecues. When forming a site with geosynthetics, the banks of artificial reservoirs and hillsides strengthening, fertile soils protection.
Municipal services use a one-dimensional geogrid on landfills for the storage, processing, disposal of solid household and industrial waste (MSW);
- formation of septic tanks;
- shielding the ground under aggressive substances;
- increasing the slope steepness - saving space.
In winter, near buildings with the possibility of falling ice, snow blocks (multistorey buildings, radio towers), utilities and organizations of housing and communal services pull flat geogrids to protect people.
Biaxial, monoaxial grids are laid on the prepared surface. Depending on the basis, preliminary works include:
- Old asphalt concrete, asphalt pavement is cleaned with compressed air using a compressor or mechanical brushes. Then crushed stones, gravel pits and rifts are filled up. The treated area is washed, dried.
- Horizontal, sloping soil cleaned of stones and stumps, remove the sod, leveled special equipment and tamped. In landscape design using hand tools. The finished area is covered with geotextile, preventing possible filler dips.
Before spreading geogrids poured leveling layer of sand. This is especially important for areas with swampy soils, surface waters.
Geogrid is laid on the cleaned surface in a day. Rolls roll along the road axis (from top to bottom on the slopes) with a side overlap of 30 ÷ 40 cm. The exact value of the overlap is indicated in the manufacturer’s instructions. The lattice should fit snugly to the geo-fabric.
When reinforcing the bearing layers of the road surface, the pins are installed only at the beginning of the canvas. If the geogrid to consolidate throughout the area, in the process dumping would not be necessary tension. The exception is if there are strong winds, the possible loads during backfilling and leveling can change the design position. Then the fasteners are placed through 10÷15 m along the strips and at the beginning.
When installing the separating layers, the first fasteners are installed on the upper edge, the following rows through 1÷2 m 3 pieces. For the reinforcing layers of fabric are placed perpendicular to the direction of the mound, designated the lap record in 2÷3 m.
Biaxial, uniaxial flat geogrid is attached with brackets or U-shaped anchors.
Dumping is carried out immediately after laying the geogrid technology "from yourself". This method retains the necessary tension. The thickness of the bulk layer 40÷50 cm depending on the purpose.
In landscape design before the formation of sites, tracks with geosynthetic grids set restrictive borders. The remaining stages are similar to road construction.