Investigation of ground vibration induced by inter-city express train

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (16) : 56-61.

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Investigation of ground vibration induced by inter-city express train

LI Xiao-zhen，LIU Quan-min，ZHANG Xun，ZHANG Zhi-jun，LI Ya-dong

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Abstract

On the basis of the measuring ground-borne vibration of some inter-city express railway viaduct, test results analysis shows that: a cyclical peak of acceleration can be clearly distinguished in the near field; whether transverse or vertical vibration, a rapid attenuation of vibration with the distance to the near-track center is observed, however the vibration at 7.5 m appears to be amplified; farther from the track center, the ground vibration decreases more slowly, and the ground vibration with the distance conforms to a logarithmic relationship; the horizontal ground vibration caused by the elevated rail transit is larger 3.9～9.0 dB than the vertical vibration ; the dominant frequency of the vertical ground vibration is 10~100 Hz, while the transverse vibration has a wider frequency range of 4~100 Hz; low-frequency vibration transfers farther than high frequency vibration; the partially effect of environmental vibration induced by two-track viaduct is obvious; vibration level increases with the speed in the slope of 0.036 ~ 0.049 dB/(km/h).

Key words

rail transit / viaduct / environmental vibration / field measurement / vibration acceleration level

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LI Xiao-zhen;LIU Quan-min;ZHANG Xun;ZHANG Zhi-jun;LI Ya-dong. Investigation of ground vibration induced by inter-city express train[J]. Journal of Vibration and Shock, 2014, 33(16): 56-61