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

<div>(a) Cross-correlation function between W1 and W3; (b) first intrinsic mode function (IMF1) based on HHT; (c) second intrinsic mode function (IMF2) based on HHT; (d) PSD frequency spectrum of the correlation function in (a) with the two peaks corresponding to the two intrinsic mode functions.</div>

Shock and Vibration

fig22

Figure 22

Figure 22: Vibration Characteristics of Underground Structure and Surrounding Soil Underneath High Speed Railway Based on Field Vibration Tests 