Research on a Critical Hydraulic Gradient of Piping in Noncohesive Soils

Table 1

Soil sample parameters, test results, and calculation results.

Soil sample	n	Gs	2a (mm)	d0 (mm)	Jcr test value	Jcr test value
						Formula (16)	Kantlaev’s formula
A	0.34	2.60	0.12	0.57	0.20	0.16	0.15
B	0.37	2.60	0.15	0.42	0.34	0.36	0.37