Abstract
This paper presents a field measurement of the train-induced vibration in the northwest Shanghai, where Shanghai Metro Line 11 crosses under Beijing-Shanghai Railway. Ground and tunnel accelerations are measured for the separate and simultaneous passages of the ground and subway trains. Vibration characteristics are subsequently analyzed in the time domain and in the frequency domain. Measurement results show that the ground vibration acceleration level (VAL) induced by the simultaneous operation of the ground and subway trains is 6 ~ 13 dB greater than that induced by the separate operation for the frequency range 20 ~ 160 Hz. Significant frequency components of the vibration induced by the simultaneous operation are shown to be redistributed to cover those induced by the separate operation. Measured data in this experimental test can also be used to validate future numerical models for predicting train induced vibration of similar embankment-tunnel systems.
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