CAJ | 학술논문

通过对地铁隧道内普通整体道床、Ⅲ型轨道减振器、弹性短轨枕、梯形轨枕、钢弹簧浮置板道床的现场振动测试，进行时、频域对比，了解各种减振措施在不同频率范围内的减振效果差异。结果表明，轨道减振器、梯形轨枕、弹性短轨枕及钢弹簧浮置板可降低隧道壁VLZmax分别为4 dB，7．6 dB，7．8 dB，19．0 dB；无论何种轨道减振措施，高频减振效果高于低频减振效果，Z计权的振动加速度级明显小于不计权的振动加速度级减振效果；梯形轨枕、弹性短轨枕、轨道减振器对50 Hz以上振动减振效果明显，钢弹簧浮置板道床对12．5 Hz以上振动减振效果明显，对控制列车运行产生的二次噪声更有效。
통과대지철수도내보통정체도상、Ⅲ형궤도감진기、탄성단궤침、제형궤침、강탄황부치판도상적현장진동측시，진행시、빈역대비，료해각충감진조시재불동빈솔범위내적감진효과차이。결과표명，궤도감진기、제형궤침、탄성단궤침급강탄황부치판가강저수도벽VLZmax분별위4 dB，7．6 dB，7．8 dB，19．0 dB；무론하충궤도감진조시，고빈감진효과고우저빈감진효과，Z계권적진동가속도급명현소우불계권적진동가속도급감진효과；제형궤침、탄성단궤침、궤도감진기대50 Hz이상진동감진효과명현，강탄황부치판도상대12．5 Hz이상진동감진효과명현，대공제열차운행산생적이차조성경유효。
In order to meet the environment vibration requirements of buildings which are sensitive to vibration,four different kinds of measures for track vibration mitigation were adopted.The difference between various vibration mitigation measures in different frequency bands was investigated by comparing on-site vibration test results in time domain and frequency domain.The measures adopted include Ⅲstyle rail vibration absorber,flexible short sleeper,ladder sleeper and steel spring floating slab track in underground circular shield tunnel.The results show that the four measures can respectively reduce the degree of Z direction vibration in 4 dB,7.6 dB,7.8 dB,19.0 dB on tunnel wall;the mitigating vibration effect at high frequency is higher than at low frequency,and the weighted vibration acceleration level is significantly lower than the non-weighted;the spring floating slab track is of obvious mitigating vibration effect above 12.5 Hz and the flexible short sleeper, ladder sleeper,and rail vibration absorber are of obvious mitigating vibration effect above 50 Hz.