Application Research on Elevated Line of Urban Rail Transit with Resonant Combined Track Bed System
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摘要: 介绍了城市轨道交通谐振式组合道床减振系统在地铁高架线的施工工艺，并就运营后线路道床振动及噪声进行在线测试。结果表明：相对于普通道床，组合道床系统道床减振量达到18.2 dB，轨旁噪声降低5.1 dBA，桥下噪声降低8.1 dBA，桥下水平距离20 m处噪声降低2.3 dBA。组合道床系统减振降噪效果优异，施工工艺成熟完善，可在城市轨道交通特殊减振措施进行推广应用。Abstract: The construction technology of resonant combined track bed vibration reduction system for urban rail transit in subway elevated lines was introduced, and online tests on the vibration and noise of the track bed after operation conducted.Resultsshowed that compared with the ordinary track beds, the amount of vibration reduction of the bed system of the combined track bed system reached 18.2 dB, the noise beside the track reduced by 5.1 dBA, the noise under the bridge reduced by 8.1 dBA, and the noise at the horizontal distance of 20 m under the bridge reduced by 2.3 dBA. The combined track bed system had excellent vibration and noise reduction effects, and the construction technology was mature and perfect, which could be applied to the special vibration reduction of urban rail transit.
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