The steel-plastic reinforced geogrid is compounded by steel-plastic reinforced belt through a novel process. Because the surface of the product is rolled into a regular coarse pattern, it bears huge anti-stress and friction with the filling in the replacement filling layer, which limits the shear, side extrusion and uplift of the foundation soil as a whole. Due to the large stiffness of the reinforced soil cushion, it is conducive to the diffusion and more uniform transmission of the upper foundation load, distribution to the underlying soft soil layer, better improve the bearing capacity of the foundation, due to the role of reinforced soil cushion, increased the overall stiffness of the compression layer of the foundation, is conducive to adjusting the deformation of the foundation, the use of steel-plastic reinforced geogrid and the formation of reinforced soil composite cushion is a flexible structure, can well absorb the energy of the earthquake, so its seismic performance is good.

Main use

It can be used for highway, railway, embankment, abutment, construction access road, wharf, bank protection, flood control embankment, dam, beach treatment, freight yard, slag yard, airport, sports ground, environmental protection building, soft soil foundation reinforcement, retaining wall, slope protection and pavement anti-inferior civil engineering.

Product Features

◎ High strength, small creep, adapt to all kinds of environmental soil, can fully meet the high grade highway in the tall retaining wall use.

◎ 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.

Compared with the traditional grille, it has the characteristics of high strength, strong bearing capacity, corrosion resistance, anti-aging, large friction coefficient, uniform perforation, convenient construction and long service life.

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

Steel-plastic bidirectional geogrid performance index JT/T(480-2002)

Scope of application of technical indicators

It is suitable for reinforced soil retaining wall, bridge abutment, slope and roadbed reinforcement, etc., to improve the bearing capacity of weak foundation and resist the formation of soil fracture surface. Steel plastic composite geogrid because of its tensile strength, small deformation characteristics, is widely used in soft foundation treatment and disposal of subgrade uneven settlement, especially the new and old subgrade uneven settlement treatment, steel plastic grid instead of plastic grid treatment effect is better, is the choice of material to deal with subgrade uneven settlement. The steel-plastic composite geogrid is used to reinforce the soft soil foundation, and its net structure is conducive to the drainage of the soft soil foundation; under the load of embankment filling, the water in the soft soil seeps out, which promotes the consolidation of the soft soil and the improvement of the bearing capacity of the soil foundation. The soft soil foundation and the steel-plastic composite geogrid work together to form an interlocking system. When the vehicle is carried, the vertical stress on both sides increases, so that the vertical stress of the base tends to be uniform.

Design Application

◎ When geogrid is applied to soft foundation treatment, the design strength of geogrid should be determined according to the height of subgrade filling while determining the location and number of layers of the additional grid according to the geological conditions.

◎ When the filling height is greater than 4m, the geogrid can meet the minimum requirements of the industry standard, and the vertical and horizontal ultimate tensile force should not be less than 20kN/m

When the filling height is between 3-4m, the vertical and horizontal ultimate tensile force of geogrid is not less than 40kN/m.

◎ When the filling height is less than 3m, the vertical and horizontal ultimate tensile force of geogrid is not less than 50 kN/m, and the elongation is less than 4%. It is recommended to adopt GSZ60-60 geogrid. When geogrid is used in subgrade filling and excavation joint, geogrid with two-way not less than 40 kN/m should be adopted, and GSZ60-60 geogrid should be adopted.

◎ When used to widen the combination of old roads and old roads, refer to the method of using grilles for the expansion of Shen-Da Expressway: for subgrade with a filling height of more than 3 meters, add steel-plastic composite grilles 20cm away from the top of the subgrade, and adopt steel-plastic composite grilles with longitudinal (vertical route direction) ultimate tensile force greater than or equal to 60kN/m and transverse (parallel route direction) ultimate tensile force greater than or equal to 20 kN/m, elongation ≤ 4%.

Construction method

The laying surface of the geogrid shall be relatively smooth. After the laying layer is accepted, in order to prevent longitudinal skew, the laying can be started by drawing white lines or hanging lines on the laying layer according to the width, and then the end of the geogrid shall be fixed with U-shaped nails (4 nails per meter width and fixed at uniform distance).

After fixing the end of the grid, slowly pull the grid forward with a laying machine or manual method, and manually straighten it every 10 meters long until one roll of grid is laid, and then lay the next roll. The operation is the same as before.

Paving: the unit of roll length is taken as the section length of laying. After the section length of the grille is paved, the laying quality shall be checked as a whole, and then the next section shall be laid.

When the next section is laid, the grid and the grid shall be overlapped by one grid clear distance, and the second section shall be laid in the forward direction after being fixed with binding wires. By analogy, the operation requirements are the same as before.