地铁车站振动特性及传播规律实测研究
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1.华东交通大学 轨道交通基础设施性能监测与保障国家重点实验室;2.广州地铁设计研究院股份有限公司

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国家自然科学(52178423,52068029);江西省教育厅科学技术研究项目(GJJ210644)


Experimental study on vibration characteristics and propagation rules of subway stations
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    摘要:

    为研究地铁进出站引起的地铁车站振动特性,以国内某城市三线平行换乘地铁车站为研究对象,基于现场实测数据分析该车站振动特性及传播规律。分析结果表明:受线路建成及运营影响,该车站内各站台振动响应差异较大,进站工况下,站台1、站台2和C线站台平均Z振级为:81.9、91.4、61.7 dB,站台1和站台2振动主要频段为75~125 Hz;出站工况下,三个站台的平均Z振级为:82.7、93.8和63.7 dB,站台1和站台2的振动主要频段为50~100 Hz,而C线站台振动响应在两种工况下均集中在50~60 Hz内。在车站内多数测点均可发现出站工况下振动大于进站工况,最大差值约2.5 dB。车致振动传递至地面一层后会先产生一定衰减,继续向上传递至地面二层则会产生放大效应,振动放大约3.6~5 dB。车致振动在该车站建筑内的传递所产生的衰减较小,振动衰减主要依靠的是土层,振动衰减量约为0.53 dB/m。研究成果可为类似结构的地铁车站及车站上盖建筑的振动预测、振动舒适度评价及减振设计提供参考依据。

    Abstract:

    In order to study the vibration characteristics of subway stations caused by subway entry and exit, a three-line parallel transfer subway station in a domestic city was taken as the research object, and the vibration characteristics and propagation rules of the station were analyzed based on the field measurement data. The analysis results show that, affected by the completion and operation of the line, the vibration response of each platform in the station is quite different. Under the inbound condition, the average Z-vibration level of platform 1, platform 2 and platform C is 81.9, 91.4 and 61.7 dB, and the main frequency band of platform 1 and platform 2 is 75~125 Hz. Under outbound conditions, the average Z vibration levels of the three platforms are: 82.7, 93.8 and 63.7 dB, the main frequency band of vibration of platforms 1 and 2 is 50~100 Hz, while the vibration response of platform C is concentrated within 50~60 Hz under both conditions. It can be found in most measuring points in the station that the vibration under outbound conditions is greater than that under inbound conditions, and the maximum difference is about 2.5dB. After the vehicle-induced vibration is transmitted to the ground floor, it will first produce a certain attenuation, and if it continues to be transmitted to the ground floor, it will produce an amplification effect, and the vibration is about 3.6~5dB. The attenuation of vehicle-induced vibration transmitted in the station building is small, and the vibration attenuation mainly depends on the soil layer, and the vibration attenuation is about 0.53 dB/m. The research results can provide a reference for vibration prediction, vibration comfort evaluation and vibration reduction design of subway stations and buildings with similar structures.

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  • 收稿日期:2023-08-29
  • 最后修改日期:2023-10-27
  • 录用日期:2023-10-30
  • 在线发布日期: 2024-03-25
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