In:
INTER-NOISE and NOISE-CON Congress and Conference Proceedings, Institute of Noise Control Engineering (INCE), Vol. 265, No. 7 ( 2023-02-01), p. 417-422
Kurzfassung:
This paper presents the time-frequency characteristics of ground vibrations near subway stations through field tests and analyses. More than 15 ground vibration measurement points are set up in the longitudinal and transverse directions of the track near a subway station. Overall, the ground vibration level (VLzmax) above the tunnel is approximately 73 dB on the border between the station and mainline, while it attenuates to 63 dB away from the tunnel by approximately 30 meters; the dominant frequency in the mainline area is approximately 63-80 Hz. The results in the longitudinal
direction show that the ground vibration increases rapidly as the train drives away from the station because of the train speed growing, and VLzmax is less than 10 dB between the station and near the mainline area, while the dominant frequency in the mainline area is higher than that in the station area. The attenuation rate of the ground vibration in the transverse direction for the mainline area is faster than that for the station area. The power distribution law y=Ax^(-α) can describe the vibration attenuation characteristics, and its "peak and long tail effect"
and "scale-free characteristics" can predict the vibration at any position by measuring two specified locations.
Materialart:
Online-Ressource
ISSN:
0736-2935
DOI:
10.3397/IN_2022_0059
Sprache:
Englisch
Verlag:
Institute of Noise Control Engineering (INCE)
Publikationsdatum:
2023
