Research on the Vibration Isolation Characteristics of Floor Vibration Isolation Slab System under Train Operation

Table 2

Soil properties.

Type of soil	Depth(m)	Modulus of elasticity/Mpa	Poisson’s ratio	Damping ratio	Density/Kg/m^2	Shear wave speed s/m·s^−1	Compression wave speed s/m·s^−1
Mixed fill	1	191	0.36	0.03	1980	203	411
Powdered clay	3	268	0.33	0.03	1990	216	475
Coarse sand	4	394	0.23	0.03	1918	260.2	416.0
Gravelly sand	32	430	0.29	0.03	2122	351.8	879.5