Experimental Study of Vibration and Propagation Patterns in Three Parallel Subway Stations
[Objective]To study the vibration characteristics of subway stations caused by the entry and exit of three-line parallel subway stations.[Method]Taking a third-line parallel transfer subway station in a domestic city as the research object,the vibration characteristics and propagation rules of the station were analyzed based on the field measured data.[Results]Affected by the completion and operation of the line,the vibration response of each platform in the station varied greatly.Under the inbound condition,the average Z vibration levels of plat-forms 1,2 and C were 81.9,91.4,61.7 dB,and the main frequency bands of platform 1 and 2 were 75～125 Hz.Un-der outbound conditions,the average Z vibration levels of the three platforms were 82.7,93.8,63.7 dB,the main frequency band of vibration of platforms 1 and 2 is 50～100 Hz,while the vibration response of platform C is con-centrated within 50～60 Hz under both conditions.[Conclusion]In most measuring points in the station,it can be found that the vibration under outbound conditions is greater than that under inbound conditions,and the maxi-mum difference is about 2.5 dB.After the vehicle-induced vibration is transmitted to the ground floor,it will first produce a certain attenuation,and when it is transmitted to the ground floor,it will produce amplification,and the vibration is about 3.6～5 dB.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 similar structures,subway stations and buildings with parallel access to multi-ple lines.
environmental vibrationsubway stationfield measurementvibration transmission law
万方数据
维普
