A geosynthetic at the bottom of the aggregate layer confines the stone, separates it from the subgrade and spreads wheel loads, which cuts rutting and the base thickness needed. Biaxial and triaxial geogrids work mainly by interlock with the stone, while wovens work by separation and by tension as the ground deflects. It is used for haul roads, access roads, working platforms and parking areas over weak soils.
Stabilization grid saved us almost a foot of stone on the access road, and it isn't rutting.
Also heard as
- subgrade stabilization
- base stabilization
- base reinforcement
Related terms
Biaxial geogrid
Geogrid with similar strength in both directions, used mainly to stabilize aggregate bases over soft ground.
Triaxial geogrid
Geogrid with triangular apertures that gives fairly even stiffness in every direction across its plane.
Subgrade
Native or prepared soil surface on which a pavement, aggregate base or liner system is built.
Separation
Keeping two different soil layers, such as an aggregate base and a soft subgrade, from mixing under load.