Experimental Study on Ground Vibration Induced by Moving Trains on Test Line of Metro Depot

An experimental study was conducted on ground vibration of the Xiajiao Depot on the Guangzhou Metro Line 3, induced by reverse cyclic loading of metro vehicles on the test line. The regulation of vibration attenuation was analyzed. The results show that the frequency of the vibration waves is mainly in the range of 10 Hz to 80 Hz and the vertical vibration is stronger than the horizontal vibration. The acceleration amplitude of ground vibration is determined by the horizontal distance from measuring points to the track center, and there exists a vibration amplifying zone a certain distance to the track. With the increase of distance, the vibration attenuation of high frequency is faster than that of the low frequency. It is most noteworthy for the vibration attenuation within 6 m to the track center. There is little impact of vibration 38 m from the track, where the average of maximum vibration levels of the 1/3 octave is 60 dB. The research on vibration in metro depot is still in the initial stage and it is necessary to carry out special evaluation.