Triaxial Shear Behavior of a Gravelly Sand with Different Forms of Reinforcement

Table 2

Strength indices of the soil specimens: the apparent cohesion (c) and friction angle ().

Reinforcement scheme	c (kPa)	(°)
Unreinforced	15.9	44.5
One layer of geogrid sheet	29.6	48.8
One geogrid cell	28.8	48.7
One layer of geogrid composite	53.9	46.4
Two layers of geogrid composite	59.9	53.4