The vibration and secondary radiation noise induced by subway's operation have significant influences on people's work and life.Based on one super high-rise building next to subway,three dimensional numerical models of the tunnel-soil-building system were established through MIDAS GTS NX to research the characteristics of the building's vibration and secondary radiation noise.Considering the pit support structure,the combined measure of vibration and noise reduction has been proposed,which includes the deepened underground diaphragm wall with rubber layer outside the fixed section,fertilizer trough backfilled with damping materials,and PVC damping cushion beneath the building's foundation.The mitigation performances were also discussed.The results show that the vibration and secondary radiation noise of the building vary with a trend of'large at high and low floors,small in the middle ones'.The proposed combined measure could mitigate the vibrations evidently,especially for those over 50Hz.The combined measure could obviously reduce the secondary radiation noise of each floor for the building.
关键词
地铁运行/超高层建筑/振动/二次辐射噪声/减振降噪
Key words
subway's operation/super high-rise building/vibration/secondary radiation noise/vibration and noise reduction
维普
万方数据