BLASTING, Volume. 41, Issue 3, 111(2024)

Research on Vibration Response Characteristics and Attenuation Rule of Advance Tunnel with Minimum Clear Distance

PENG Yue-sen1, ZHONG Dong-wang1,2, WANG Chao-zhen3、*, BAI Wen-liang3, ZHAO Yun-peng3, LU Hong-ping3, LI Hong-lin3, and YANG Zhi-long4
Author Affiliations
  • 1College of Science, Wuhan University of Science and Technology, Wuhan 430065, China
  • 2Hubei Intelligent Blasting Engineering Technology Research Center, Wuhan University of Science and Technology, Wuhan 430065, China
  • 3China Railway Construction Bridge Engineering Bureau Group CO., LTD., Tianjin 300300, China
  • 4Explosives Corporation Limited, Changsha 410000, China
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    As tunnels are integral to railways and other transport infrastructures, studying the vibration response and attenuation rule of tunnel blasting for tunnel construction projects is significant. The blasting solutions proposed in this paper are to minimize clear distance in the blasting excavation of a high-speed railway tunnel for the Chongqing-Kunming high-speed railway construction project. A new excavation method was developed to divide the excavation section into alternating blasting on both the left and right sides. Besides, the blasting vibration velocity of the double-line tunnel was monitored. The vibration velocity analysis of the advance tunnel shows that the maximum vibration velocity in the tunnel is mainly caused by cutting hole and vault auxiliary hole blasting, and the radial vibration velocity is the maximum. The vibration velocity of the arch waist of the explosion side wall is 1.3 to 2 times bigger than that of the arch foot on the cross-section, and the ratio caused by the initiation of the cutting hole is relatively small. Meanwhile, the vibration velocity of each point in front of the tunnel face is more significant than that at the relative position behind the vertical section. In contrast, the attenuation rate of the vibration velocity behind is relatively more significant. The research findings have been successfully applied to the engineering practice, and a relevant small clear distance tunnel has been safely connected.

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    PENG Yue-sen, ZHONG Dong-wang, WANG Chao-zhen, BAI Wen-liang, ZHAO Yun-peng, LU Hong-ping, LI Hong-lin, YANG Zhi-long. Research on Vibration Response Characteristics and Attenuation Rule of Advance Tunnel with Minimum Clear Distance[J]. BLASTING, 2024, 41(3): 111

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    Paper Information

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    Received: Dec. 12, 2023

    Accepted: Dec. 20, 2024

    Published Online: Dec. 20, 2024

    The Author Email: Chao-zhen WANG (413751769@qq.com)

    DOI:10.3963/j.issn.1001-487x.2024.03.014

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