Experimental Study on Seismic Dynamic Characteristics of Shallow-Bias Tunnel with a Small Space

Figure 6

Fourier spectra of different measuring points: (a) measuring point A1; (b) measuring point A2; (c) measuring point A3; (d) measuring point A4; (e) measuring point A5; (f) measuring point A6; (g) measuring point A7; (h) measuring point A8; (i) measuring point A9; (j) measuring point A10.

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