Test and analysis on vibration of different track structures in tunnel

LIU peng-hui;YANG Yi-qian;YIN Jing

Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (2) : 31-36.

PDF(2443 KB)
PDF(2443 KB)
Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (2) : 31-36.
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Test and analysis on vibration of different track structures in tunnel

  • LIU peng-hui,YANG Yi-qian,YIN Jing
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Abstract

In order to meet the environment vibration requirements of building which is sensitive to vibration, four different measures of track vibration mitigation are adopted. The difference of various vibration mitigation measures in different frequency domain is known by comparing on-site vibration test results in the time domain and frequency domain, including Ⅲ style rail vibration absorber, flexible short sleeper, ladder sleeper and steel spring floating slab track in underground circular shield tunnel. The results show that: (1) Four measures can respectively reduce degree of Z direction vibration is 4 dB, 7.6 dB,.8 dB, 19.0 dB at tunnel wall. (2) High frequency mitigating vibration effect is higher than low frequency, and the weighted vibration acceleration level is significantly lower than the non-weighted. (3) spring floating slab track have obvious mitigating vibration effect above 12.5 Hz. Flexible short sleeper, ladder sleeper, and rail vibration absorber have obvious mitigating vibration effect above 50 Hz.


Key words

metro / mitigating vibration effect / degree of Z direction vibration

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LIU peng-hui;YANG Yi-qian;YIN Jing. Test and analysis on vibration of different track structures in tunnel [J]. Journal of Vibration and Shock, 2014, 33(2): 31-36
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