Vibration Isolation Mechanism of Concrete Piles for Rayleigh Waves on Sand Foundations

Table 2

Particle composition and related indexes of the backfilled sand.

Name	Pebble	Gravel			Sand			Silt			Clay
Particle composition
Particle size (mm)		60	20	5	2	0.5	0.25	0.075	0.05	0.01	0.005
	∼	∼	∼	∼	∼	∼	∼	∼	∼	∼	∼
	60	20	5	2	0.5	0.25	0.075	0.05	0.01	0.005	0.002
Content (%)				0.9	13.5	63.7	16.0	0.5	0.8	0.4	>0.0
Particle composition index
Index	d60		d30			d10		Cu		Cc
Value	0.365		0.286			0.116		3.2		1.9