苏州轨道交通2号线轨道减振措施性能测试分析

在苏州轨道交通2号线隧道内采用III型轨道减振器扣件、中量级钢弹簧浮置板道床以及重型钢弹簧浮置板道床等3种减振措施的代表断面上,采用落锤法测量钢轨、轨枕、道床及隧道侧壁测点的振动时域信号,计算得到各断面上测点的传递函数,并评价分析了这3种减振措施的性能。选取对列车振动较敏感的轨道下穿居民小区路段进行地面振动测试,分析了地下列车运行对居民生活的振动影响。研究结果表明,苏州轨道交通所采取的大埋深及重型钢弹簧浮置板道床等减振措施是卓有成效的。

Damping Performance Test Analysis on Suzhou Metro Line 2

On the representative sections of Suzhou metro Line 2,type III vibration damper,middle-weight steel spring floating slab track and heavy-weight steel spring floating slab track are adopted. Monkey hammer method is used to obtain the vibration time domain signals at rail measuring points,on sleeper,ballast bed and tunnel sidewall respectively. The vibra-tion transfer function between rail points of each section is calculated,performances of the above three vibration mitiga-tion measures are evaluated. Besides,the sensitive residential areas above the tunnel are chosen as the object to test ground vibration,vibration effect over residents daily life caused by train operation is analyzed. The research shows that measures such as the large tunnel burial depth and the heavy-weight steel spring floating slab track taken by Suzhou rail transit are very effective.