
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.
Test and analysis on vibration of different track structures in tunnel
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.
metro / mitigating vibration effect / degree of Z direction vibration {{custom_keyword}} /
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