Abstract:
This article carried out vibration tests on three typical road sections along a subway, and analyzed the regulation of vibration attenuation. The conclusion is that the 60-80 Hz weight of environmental vibration of subway is stronger than other weight, and the weight transmitted to structures is mainly dominated by frequency below 20 Hz; the vibration in vertical weight attenuates more slowly than in horizontal weight, and the amplitude in vertical weight is higher than in horizontal weight; there exists a vibration amplifying zone in a certain distance to subway track, which is determined by the geological condition, the depth of the tunnel and mechanism of vibration. In this paper, the distance is 20~30 m away subway track; the energy were mainly within 10 Hz in the vibration amplifying zone, and high frequency vibration weight could attenuate with the increase of distance, although some could magnify under certain geological conditions. Finally, the attenuation empirical formula was given to predict subway environmental vibration, which could be used for reference in vibration control and buffer design of the ground structure.