Biaxial geogird mat is the preferred geosynthtic products for base course reinforcement and soil stabilization applications. BPM brand biaxial geogird mat is specially designed and manufactured to distribute bearing loads over a broader area which increases the overall load capacity of the underlying subgrade fill material. Biaxial geogird offers high tensile strength at low strain and are designed for maximum bearing capacity and shear resistance.
Case study
- Location :Cambodia
- Product(s) : Biaxial geogrid mat
- Application : road construction
BPM Cambodian customer found us on Facebook and informed us that he had recently contracted a road repair project. He introduced us to the basic situation of the project. As it was in the rainy season, there was a lot of precipitation and the road was not well drained, which made the road muddy. The situation seriously affected the travel of local residents, and road subsidence even occurred in some places near the river bank. In the dry season, the road is relatively dry and some small stones are uneven. Some ground cracks have appeared after prolonged exposure to the sun and the rolling of vehicles.
After the BPM engineering team learned about this situation, they made a video communication with the customer. The customer described the basic situation of the project to our engineer and said his thoughts. The client wanted to build a road that can be used for a long time, the service time can reach more than ten years, and the cost should not be too high, because the cost of the project is limited. The customer showed our engineers the local soil conditions, surrounding environment and current problems. Since the customer saw the case of the project we did in the past on our website, the customer was very confident in us, and he hoped to have a pleasant cooperation with us.
Solution
After the customer ended the video connection, the BPM engineer team had a discussion, and finally decided to use a 30KN biaxial geogrid to solve the problem. Because the biaxially stretched geogrid has great tensile strength in both the longitudinal and transverse directions, this structure can provide an ideal interlocking system for more effective force bearing and diffusion in the soil, which is suitable for large-area permanent Supporting foundation reinforcement. We informed the client of this solution. After discussing with his contracting team, the client felt that it was a feasible solution.
Benefits
The biaxial geogrid mat is the stretched or rectangular polymer mesh. the punched holes in the polymer sheet produced by extrusion, and then performs directional stretching under heating conditions. The biaxial geogrid mat continues to stretch the unidirectionally stretched grid in the direction perpendicular to its length. production.
In the fabrication of the plastic geogrid, the polymers 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. It has the following advantages:
- Increase the bearing capacity of the road (foundation) and prolong the service life of the road (foundation).
- Prevent the road (ground) surface from collapsing or cracking, and keep the ground beautiful and tidy.
- The construction is convenient, time-saving, labor-saving, shortening the construction period and reducing maintenance costs.
- Prevent cracks in the culvert.
- Strengthen the soil slope to prevent soil erosion.
- Reduce the thickness of the cushion layer and save the cost.
- Support the stable greening environment of the side slope grass planting mat.
Installation guide
The technical indicators of the geogrid shall meet the design requirements. When laying, the surface of the soil layer should be flat, and hard protrusions such as broken stones and stones are strictly prohibited. When laying, the surface of the geogrid should not be wrinkled. The biaxial geogrid mat shall be fixed on the surface of the filling layer by manual tensioning and nailing.
The connection between the steel and the plastic grille should be firm, the connection strength in the direction of force should not be lower than the design tensile strength of the material, and the superimposed length should not be less than 30 cm. The horizontal lap length is not less than 30 cm, and the longitudinal reverse lap length is not less than 50 cm. For double-layer laying, the seams of the upper and lower layers should be staggered and the distance should not be less than 50 cm.
After the geogrid mat is laid, it should be filled with materials in time, strictly control the entry and exit of the mixing vehicle, and prohibit the sudden turning, braking and dumping of the mixture on the grid layer to prevent damage to the plastic grid. When laying the grille, the temperature of the road surface should be between 5°C and 60°C to avoid long-term exposure to the sun. A light bulldozer or front loader should be used for filling. Vehicles are not allowed to drive on geogrids that are not fully loaded.
Summary
Laying the biaxial geogrid mat reinforcement layer on the dirt road, and then pave the asphalt concrete surface layer on it. The pavement laid by this method can prevent the reflection of cracks in the base layer, reduce the rutting of the pavement, and prolong the service life of the pavement. The biaxial geogrid mat has the characteristics of high tensile strength, low elongation, no creep, good compatibility with asphalt mixture, stable physical and chemical properties, high temperature resistance, strong locking, and strong ultimate effect. Its main function is to evenly transmit the axial load. The stress of reflection cracks changes from vertical to horizontal. The use of two-way stretch grids can increase the overall tensile strength of the asphalt mixture, effectively improve the stress distribution of the pavement structure, and resist and delay the generation of reflective cracks in the asphalt concrete pavement caused by the pavement base cracks. Thereby improving the service life of the road surface.
BPM customer purchased a total of 30,000 square meters of biaxial geogrid mat. We delivered the goods within one week. After the customer received the goods, the project was completed 40 days later. The project went smoothly. During the construction process, our engineers specially video-connected to inform customers of points that need to be paid attention to. The customer was very satisfied with our products and our service. In the next six months, the customer placed an order for two40HQ of geogrids and geotextiles.
Specifications of Biaxial Geogrid Mat for road construction in Cambodia
- Total biaxial geogrid mat quantity–82,000 squares meters
- Biaxial geogridspecification – 30KN
- Each roll size – 3.95m*100m
About BPM
BPM manufactures and supplies many types of effective and state of the art geogrid, geomembrane, geotextile, and geosynthetics to over 36 countries. Our main innovative, high quality geogrid products include plastic biaxial geogrid, fiberglass geogrid, plastic uniaxial geogrid, warp knitting polyester geogrid, and steel plastic georgic mesh, etc. BPM brand brand high quality geosynthetic products had been certificated by the ISO9001, ISO14001,OHSAS18001 Soncap, SASO and BV, SGS and Intertek, etc.
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