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

摘要

An experimental study on ground vibration of Xiajiao depot of Guangzhou Metro Line 3 induced by re-verse cyclic loading of metro vehicles on test line was conducted. The regulation of vibration attenuation was analyzed. The results show that: the frequency of the vibration waves is mainly in 10Hz to 80Hz 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 in a certain distance to the track. With the increasing of distance, the vibration attenuation of high frequency is faster than that of the low. It is most noteworthy for the vibration attenuation within 6m to the track center. There is little impact of vibration on 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 initial stage, it is necessary to carry out special evaluation.