Railroads and airport runways

The rapid passage of trains, the take off and landing of airplanes in very brief intervals of time, apply dynamic loads to the soil resulting in very intense compression and decompression cycles.

The foundation, being thus subjected to fatigue stresses, can undergo fracturing up to the point of collapse. Under these conditions, both very thick layers of aggregate, and frequent and expensive maintenance are required (although these maintenance costs are high, by far the most important cost factor is the reduction in revenue caused by the disruption of services).

One or more bioriented TENAX LBO or TENAX MS geogrid layers, laid on the base of the railway ballast or airport runway, constrain the aggregate by laterally confining it, and creating the necessary tensile forces. The aggregate’s thickness can therefore be reduced with considerable savings.

TENAX LBO geogrids are used to confine railways ballast; wide aperture geogrids are available for this purpose.

TENAX geogrids’ considerable rigidity and composition guarantees, in fact, a long-term effect as far as both mechanical and chemical resistance are concerned, even when used under very aggressive conditions.

When it is necessary to prevent the pumping of fine particles, a TENAX GT geocomposite can be installed at the aggregate interface, or if the goal is to facilitate drainage, a TENAX TNT geocomposite can be used instead.

TENAX LBO geogrid

TENAX MS geogrids

TENAX GT geocomposite