Георешетка для строительства автодорог
Increasingly, a polymer geogrid is used to carry out reinforcement of highways. This method is effective for both rigid and non-rigid pavements. Of particular relevance is the use of geosynthetics in unfavorable conditions: in the permafrost zone, in loose and unstable soils, in wetlands.
Geogrid can be used in the construction of a multi-lane road. In this case, it is located between the underlying and bearing layer. Perhaps three options for such reinforcement: precinct, solid and combined.
The presence of a geogrid in the construction of the road ensures the strengthening of pavement by increasing the coefficient of adhesion of filler materials. In the case of a concentrated load applied to the grid, the deformation points will be determined by the road clothing due to the cellular lattice structure. Increasing the rigidity of the road structure occurs with the participation of resistance and the effect of the external environment on the cell.
The use of bulk geosynthetics in the field of road construction is one of the best ways of reinforcing the soil leading to plate formation on the surface. The thickness of the plate formed corresponds to the height of the geomaterial. This design prevents the formation of stakes, potholes and the destruction of the roadway. Under the influence of the load, the filler material used for the cells is compacted. At this point, an effective redistribution of the load across the entire area occurs. So there is a "plate effect", that is, the design begins to behave like a flexible plate. Used geosynthetic modules shorten construction time, provide free year-round passage of special equipment in the process of construction work, that is, there is no need to arrange access roads. The volume of aggregate for cells decreases, which reduces the cost of construction and reduces its time. So, subject to the prepared basis, a team of 6-8 people per work day can be laid 1500 m2 of road geogrid, which corresponds to a road section of 250 m and a width of 6 m.
The vertical plane of the cell wall of the geogrid reduces the slip coefficient of the substrate. In this case, the soil does not spread over the surface of the underlying substrate. Due to this property, the roadway is able to absorb large loads. If the geogrid is used to reinforce concrete or asphalt road bases, the resistance of the roadway to deformations resulting from a sharp temperature drop increases. The walls of cells serve as a kind of vertical gaskets, which, in turn, are responsible for the damping function.