青岛地铁轨道减振措施应用研究及展望

Research and Prospects of Track Vibration Reduction Measures in the Qingdao Subway

为抑制振动及噪声对沿线敏感点的影响,地铁工程中采用多种型式的轨道减振措施,但轨道减振措施在青岛等城市硬岩地质条件下的减振效果尚无定论。分析3种典型轨道减振措施在岩石地质条件下的减振效果,压缩型减振扣件、减振垫浮置板和钢弹簧浮置板的减振效果分别为8.1 dB、12 dB和17 dB左右。研究浮置板减振组合道床、阻尼减振道床以及多等级减振通用预制道床等新型减振轨道结构减振效果,相应的减振效果分别为18.2 dB、6~8 dB和8.5~13.9 dB。研究结果希望为青岛及其他城市后续地铁工程建设提供参考借鉴。

Various types of track vibration reduction measures are adopted in subways to suppress the influence of vibration and noise on sensitive points along the line.However,the vibration reduction effects of track vibration reduction measures in hard rock geological conditions in Qingdao and other cities are still unclear.The vibration reduction effects of three typical track vibration reduction measures are analyzed herein in rock geological conditions.Accordingly,the vibration reduction effects of the compression vibration absorber fastener,elastic pad floating slab,and steel spring floating slab,are equal to 8.1 dB,12 dB,and 17 dB,respectively.The vibration reduction effect around the track-slab hybrid system,damping track bed,and multigrade vibration attenuation general precast track bed is also researched in this paper,obtaining vibration reduction effects of 18.2 dB,6–8 dB,and 8.5–13.9dB,respectively.Research results can provide a reference for the follow-up subway construction in Qingdao and other cities.