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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。
In the Suzhou Metro Line 2 tunnel with III-type rail shock absorber fasteners, medium-grade steel spring floating slab track bed and heavy steel spring floating slab bed and other three kinds of vibration reduction measures on behalf of the section, the use of drop hammer Method was used to measure the vibration time-domain signals of rail, sleeper, track bed and tunnel sidewall measuring points, and the transfer function of measuring points on each section was calculated. The performance of these three kinds of vibration mitigation measures was evaluated. Select the track more sensitive to the train vibration under the residential area road vibration test, analysis of the underground train running on the residents of the impact of vibration. The results show that the great depth of the rail transit in Suzhou and the vibration reduction measures such as heavy-duty steel spring floated track bed are effective.