Made by punching and drawing polypropylene sheet so that ribs run in three directions, it forms a pattern of triangles. The geometry confines aggregate radially, which suits wheel loads arriving from any direction on roads and working platforms. Design methods for these grids lean on full-scale trafficking trials rather than on tensile strength alone.
Engineer swapped the biax for triaxial geogrid and took two inches of base out of the section.
Also heard as
- triax
- TX grid
- triangular aperture geogrid
Related terms
Geogrid
Polymer grid with large open apertures that interlocks with soil or aggregate to reinforce or stabilize it.
Biaxial geogrid
Geogrid with similar strength in both directions, used mainly to stabilize aggregate bases over soft ground.
Stabilization
Improving how soft ground or an aggregate base carries traffic by adding geogrids or geotextiles.
Aperture
Open space between the ribs of a geogrid or between the strands of a woven geotextile.