Seismic Acceleration Spectrum of Ground Surface under Urban Subway Tunnels with Circular Cross Sections in Soil Deposits Based on SSI

Table 10

Maximum acceleration spectrum for SF models at different distances from the center of the tunnel image on the ground surface.

Distance (m)	Zero	5.83	10.5	15.17	26.83	38.5	51.33
Sa(μ) (m/s^2)	4.657	4.852	4.78	4.76	4.547	4.147	3.014
Sa(μ+σ) (m/s^2)	5.902	6.24	6.094	6.04	5.759	5.233	3.818