A Constitutive Model of Sandy Gravel Soil under Large-Sized Loading/Unloading Triaxial Tests

Table 1

Test schemes for large-size specimens.

Test number	Load path	Loading/unloading	Confining pressure (kPa)	Number of soil samples
1	= constant,	Loading	200, 400, 600, 800	4
	= increases
2	= constant,	Unloading	200, 400, 600, 800	4
	= decreases