Shock and Vibration / 2018 / Article / Fig 23

Research Article

Vibration Characteristics of Underground Structure and Surrounding Soil Underneath High Speed Railway Based on Field Vibration Tests

Figure 23

(a) IMF1 of the autocorrelation function of W1 and the cross-correlation functions between W1 and the other two points W2-W3 on the wall for the determination of vertical wave velocity and (b) the same plot for IMF2.
(a)
(b)

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