地铁隧道内不同轨道结构振动测试与分析  

Test and analysis on vibration of different track structures in tunnel

作　　者：刘鹏辉[1] 杨宜谦 尹京[1] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《振动与冲击》2014年第2期31-36,共6页Journal of Vibration and Shock

摘　　要：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VL Zmax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。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.

关 键 词：地铁 减振效果 Z振级 

分 类 号：TB53[理学—物理]