Three-dimensional geogrids for base reinforcement

The innovative 3D GRID three-dimensional geogrids are specifically designed for road and railway applications, where the load applied to the ground develops mainly in the longitudinal direction of the structure. The 3D Grid three-dimensional geogrids represent a significant improvement over traditional geogrids: thanks to its technology, Tenax is able to offer geogrids with a true third dimension.

The thickness of the wires and knots creates a lateral confinement action, which, combined with a specific mesh for each type of soil, maximizes the interlocking between the soil and the geogrid. All this translates into superior performance that allows for better load distribution and, consequently, a reduction in the formation of potholes and ruts, as well as a decrease in the thickness of the base layer of roads and railways.

Tenax 3D Grid geogrids are available in three types: MS, S, and XL.
They differ in terms of structure, wire thickness, and mesh size so that they can be used in all types of soil.

3D GRID MS three-dimensional geogrids have been specifically developed for use in fine, less compacted soils (silts, clays, sands). They consist of a multi-layer spider web structure that forms a dense net of multiple junctions, ensuring high interaction with the soil.

3D GRID S three-dimensional geogrids are made with thicker longitudinal wires and a 30 x 30 mm square mesh, making them ideal for reinforcing small to medium-sized soils.

3D GRID XL three-dimensional geogrids are characterized by significant dimensions in all three main directions. The concave ribs with significant thickness and the size of the openings (60 x 55 mm) allow for optimal interaction with large-sized granular materials.

Tenax 3D Grid
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Rome St. Peter's
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TENAX 3D GRID

Wheel loads are distributed along the longitudinal direction of the infrastructure and can be analyzed considering a state of plane deformations. The stress state is mainly directed vertically and transversely to the axis: traditional flat geogrids, characterized by bidirectional behavior, are not designed for road and railway applications.
Tenax 3D Grid three-dimensional geogrids confine the soil laterally, reducing deformation due to transverse stresses and consequently subsidence and the formation of potholes and ruts.
In collaboration with the Department of Transportation Science at the University of Tennessee, an extensive testing campaign was conducted using APA (Asphalt Pavement Analyzer), a specific tool for evaluating road pavements. The results confirm that 3D Grid three-dimensional geogrids perform better than traditional geogrids.