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Volume 39 Issue 8
Aug 2025
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Chinese Journal of High Pressure Physics  > 2025  >  39(8): 085301.
HE Junhui, CHENG Tiejun, CHENG Chen, LIU Xianlin, JIANG Nan, SHAO Yu, LIU Yang. Dynamic Response Characteristics of Bridge Pile Foundation Structure Subjected to Blasting Vibration of Canal Excavation[J]. Chinese Journal of High Pressure Physics, 2025, 39(8): 085301. doi: 10.11858/gywlxb.20251025
Citation: HE Junhui, CHENG Tiejun, CHENG Chen, LIU Xianlin, JIANG Nan, SHAO Yu, LIU Yang. Dynamic Response Characteristics of Bridge Pile Foundation Structure Subjected to Blasting Vibration of Canal Excavation[J]. Chinese Journal of High Pressure Physics, 2025, 39(8): 085301. doi: 10.11858/gywlxb.20251025
shu

Dynamic Response Characteristics of Bridge Pile Foundation Structure Subjected to Blasting Vibration of Canal Excavation

doi: 10.11858/gywlxb.20251025
  • 1.

    Ping Lu Canal Group Co., Ltd., Nanning 530022, Guangxi, China

  • 2.

    Guangxi Laboratory of Modern Canal, Nanning 530011, Guangxi, China

  • 3.

    Yangtze River Wuhan Waterway Engineering Bureau, Wuhan 430014, Hubei, China

  • 4.

    Guangxi Traffic Design Group Co., Ltd., Nanning 530025, Guangxi, China

  • 5.

    National Key Laboratory of Fine Blasting, Jianghan University, Wuhan 430056, Hubei, China

  • Received Date: 15 Feb 2025
  • Rev Recd Date: 11 Mar 2025
  • Accepted Date: 15 May 2025
    • Available Online: 17 Mar 2025
  • Issue Publish Date: 05 Aug 2025
    Abstract
  • Blasting excavation is a critical construction method for enhancing the canal channel expansion efficiency. However, the induced blasting vibration may adversely affect the substructure of existing waterway bridges. To clarify the dynamic response characteristics of the bridge substructure subjected to blasting-induced vibration, this study analyzed the stress and vibration velocity distributions in the adjacent bridge substructure during the Pinglu Canal channel expansion project. A finite element numerical simulation method, validated by field test, was employed to establish the safe vibration velocity threshold for the substructure based on the maximum tensile stress criterion. The results show that the maximum tensile stress occurs at the interface between the bridge pile foundation and the pile cap during canal blasting excavation. The most significant vibrations in the substructure are concentrated in the pile foundation. The allowable vibration velocity for the bridge substructure, with the pile cap as the monitoring point, is 3.2 cm/s.

     

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