Vertical Seismic Effect on the Seismic Fragility of Large-Space Underground Structures

Table 2

Soil physical properties for site I.

Soil layer	Thickness (m)	Soil type	Unit weight (kg·m^−3)	Shear wave velocity (m·s^−1)	Poisson ratio	Cohesion (kPa)	Friction angle (°)
1	1.75	Miscellaneous fill	1750	142	0.40	10.0	23.8
2	1.90	Silty clay	1900	348	0.35	13.4	12.0
3	9.00	Strong weathered granite	2300	695	0.35	—	32
4	6.00	Medium weathered granite	2450	1246	0.25	—	32
5	4.00	Slightly weathered rock	2500	1578	0.22	—	32