Dynamic Responses of Soils around a One-Hole Double-Track Tunnel with the Metro Train Meeting

Table 3

Parameters of the piezoelectric accelerometer.

Parameters	Value
Axial sensitivity (20 ± 5°C)	∼50 mV/ms^−2
Measurement range (peak value)	100 ms^−2
Maximum lateral sensitivity	5%
Frequency response (0.5 dB)	0.3∼2500 Hz
Resonant frequency	8000 Hz
Noise	<0.08 dB