Correlation Effects of Near-Field Seismic Components in Circular Metro Tunnels: A Case Study—Tehran Metro Tunnels

Table 1

Elastic properties of the rock mass, tunnel lining, and seismic excitation [23].

Input data of the example case study
Rock mass properties
Modulus of elasticity, Em	2.00 GPa
Bulk modulus, Km	1.11 GPa
Shear modulus, Gm	0.83 GPa
Shear wave velocity, CS	645 m/s
Compressional wave velocity, CP	1054 m/s
Poisson ratio, m	0.2
Density, ρm	2.0 Mg/m^3
Liner properties
Modulus of elasticity, El	19 GPa
Radius, r	4.0 m
Poisson ratio, l	0.2
Thickness, t	0.15 m
Flexibility ratio, F	3193
Compressibility ratio, C	3.74
Seismic excitation
Peak seismic stress (xy = 2 . CS . S or yy = 2 . Cp . )	1.60 MPa
Peak ground velocity attributed to S-waves,	0.620 m/s
Peak ground velocity attributed to P-waves,	0.379 m/s