Study On The Vibration Characteristics And Control Measures Of Shallow Subway

Subway train in China in recent years, rapid development has brought convenience to people's lives while also brought issues such as vibration and noise. Domestic and foreign scholars have been induced by vibration of subway trains were research-related issues, but most of the same depth in the assumed tunnel carried out under ideal conditions. This study uses the MIDAS-GTS software to create multiple three-dimensional finite element model, considering the track, tunnels, power between the surface strata and the effect of shallow tunnels under the surface vibration. Main research results in the following areas:(1) combined with Metro Line 5 Puhuangyu section, the establishment of the finite element model of the same parameters obtained are consistent with the measured data and the size of the surface vibration of the law to verify the accuracy of the model.(2) by simulating different intervals at different depths of the tunnel dynamic analysis, obtained the subway-induced dynamic response of ground rules. The shallower the dynamic response of the stronger, deeper, then the dynamic response of the depth weaker. The smaller the interval dynamic response of the tunnel, the stronger, the greater the dynamic response of the tunnel interval weaker. The appropriate increase in depth and help to reduce surface vibration of the tunnel interval.(3) change the track structure simulation parameters on the variation of surface vibration, compared the damping effect of different track structure, obtained additional adjustment of fastener floating slab and the stiffness of the surface vibrations are obviously different. Vibration control measures for the study and put forward reasonable proposals.