In this paper, the use of recycled tire-derived aggregates (TDA) mixed with ballast material is evaluated in order to reduce the train-induced ground-borne vibrations. For this purpose, a series of field vibration measurements has been carried out at an executed pilot track. The prepared ballast layer was mixed with different percentages of TDA in three sections. Moreover, another test section with pure ballast is considered as a reference. The vibrations generated by a motor-powered draisine at two different speeds are then recorded. Records of vibration data are provided using four seismometers placed once longitudinally and once transversely beside different sections. The outputs are then processed in both velocity–time and velocity–frequency domains. To verify the vibration mitigation performance of TDA in real operation conditions, field measurements under the passage of two planned passenger and freight trains are finally arranged. Results show that the best TDA mixture ratio, i.e., 10% by weight, can reduce the transmitted vibrations up to 12 dB for frequencies above 31.5 Hz. According to the obtained efficiency and the very low cost of the recycled materials, this solution can be considered as a competitive vibration countermeasure.

中文翻译：

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混合镇流剂的轮胎骨料对地面振动的影响

在本文中，评估了将再生轮胎衍生集料（TDA）与压载材料混合使用的方法，以减少列车引起的地面振动。为此，已经在执行的引导轨道上进行了一系列的现场振动测量。在三个部分中将制备的压载层与不同百分比的TDA混合。此外，另一个带有纯镇流器的测试部分被视为参考。然后记录由电机驱动的draisine以两种不同速度产生的振动。使用四个地震仪提供振动数据记录，该地震仪纵向放置一次，横向放置在不同部分旁边。然后在速度-时间和速度-频率域中对输出进行处理。为了验证TDA在实际操作条件下的减震性能，最终安排了两条计划中的客运和货运列车通过现场测量。结果表明，对于31.5 Hz以上的频率，最佳的TDA混合比（按重量计10％）可以将传递的振动降低多达12 dB。根据获得的效率和回收材料的极低成本，该解决方案可以视为一种竞争性的振动对策。