Heavy Duty Pavement Reinforcement
Excavation and replacement with an imported fill or expensive ground treatment methods such as piling can be avoided by using G.Tex biaxial Geogrids within the granular layer when building over weak and/or variable subgrades.
The G.Tex biaxial geogrids has a mesh structure; a soil, even coarse, can interlock with the apertures. Stress transmission in this case is immediate, thus limiting the deterioration of the base layer and preserving its thickness.
The three main uses of biaxial geogrid in a pavement system are to:
(a) serve as a construction aid over soft subgrades
(b) reduce the structural cross section for a given service life
(c) improve or extend the pavement's projected service life.
The primary function of G.Tex biaxial geogrids when used in pavement applications is reinforcement, in which it mechanically improves the engineering properties of the pavement system. The reinforcement mechanisms will be discussed in details in the following Section of this proposal.
The separation is a secondary function of G.Tex biaxial geogrids when used in pavements. In fact, the ability of a geogrid to separate two materials is a function of the gradations of the two materials and is generally outside the specifications for typical pavement materials. However, due to the tight aperture size associated, the G.Tex biaxial geogrids can theoretically provide some measures of separation.
Three fundamental reinforcement mechanisms have been identified involving the use of G.Tex biaxial geogrids to reinforce pavement materials. These are:
confinement or lateral restraint
load distribution or improved bearing capacity
tensioned membrane effect
Multi-layer system is also possible as a direct result of the unique interlocking action achieved between the aggregate and the G.Tex biaxial Geogrids. The resulting composite creates a stiff platform.
The system can also accommodate high dynamic and static loads such as those experienced at container ports, airport runways, or industrial loading areas. Differential settlements can be controlled by the flexural stiffness of the platform and also its ability to span depressions and voids.
Savings in Granular Thickness
Improved Fill Compaction
Support Heavy Loads
Increased Design Life