Volume 8 Issue 1
Feb.  2023
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Sun Zhongbo, Zhao Yixin, Wang Hailiang, Ren Jiandong. Research on the influence of blasting vibration on high-rise building near subway station[J]. Journal of Mining Science and Technology, 2023, 8(1): 83-92. doi: 10.19606/j.cnki.jmst.2023.01.008
Citation: Sun Zhongbo, Zhao Yixin, Wang Hailiang, Ren Jiandong. Research on the influence of blasting vibration on high-rise building near subway station[J]. Journal of Mining Science and Technology, 2023, 8(1): 83-92. doi: 10.19606/j.cnki.jmst.2023.01.008

Research on the influence of blasting vibration on high-rise building near subway station

doi: 10.19606/j.cnki.jmst.2023.01.008
  • Received Date: 2022-05-21
  • Rev Recd Date: 2022-09-01
  • Publish Date: 2023-02-28
  • Making clear the vibration response law of buildings(structures)due to blasting is of great significance both engineeringly and the economically. By conducting blasting experiment at subway station entrance A, the vibration signal of building NO.2 was analyzed through Hilbert-Huang transform. Results indicate that as height increases, the three-vector peak vibration velocity attenuate sharply, and then shows a wave-shaped change in the middle and amplify on the top floor, which was divided into attenuation area(0~26.15 m], fluctuation area(26.15~71.75 m]and amplification area(71.75~94.55 m]. The shape of the Hilbert spectrum gradually changes from three-peak to single-peak, the dominant frequency band attenuates from 75~125 Hz to 10~40 Hz and the energy amplitude decreases. This demonstrates that the lower vibration frequency of the floor in the amplification area could easily cause resonance. Based on the composition of the top-level energy spectrum fitted by the ground measuring points, it is verified that the essence of the top-level amplification effect is to selectively amplify the energy close to the natural frequency of the building in the blasting seismic wave.
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