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

Table 1

Physical index of the backfilled sand.

Index	Apparent density (kg·m^−3)	Bulk density (kg·m^−3)	Porosity (%)	Mud content (%)	Fineness modulus
Value	2632.6	1568	40.7	0.6	2.95