隧道爆破作用下建筑物振动响应分析——以青岛地铁四线大断面隧道为例
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u455.6

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Study on the Vibration Laws of Buildings in Large Section Tunnel Blasting
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    摘要:

    依托青岛地铁1号线四线大断面隧道工程,使用8台TC-4850测振仪对隧道下穿的一栋7层砖混结构建筑物进行了长期监测。通过分析数据,结合Hilbert-Huang变换(HHT)方法研究了建筑物的振动响应规律。结果表明:振速随楼层升高先减小后略微增大,在顶层表现出放大效应。垂直向峰值振速无法反映建筑物高层的受震情况。距掌子面3~10 m范围内空洞效应最显著,已开挖区的地表振速大于未开挖区。振速最大值出现在距掌子面3~10 m范围内,表现出极振效应。垂直向爆破振动信号的Hilbert谱呈现明显的多峰值结构,频率分布在20~250 Hz,已开挖区的频带范围比未开挖区有所降低。研究成果对隧道爆破振动控制及建筑物保护具有参考价值

    Abstract:

    Relying on the four-line large-section tunnel engineering of Qingdao Metro Line 1, 8 sets of TC-4850 vibration meters were used to monitor the 7-story brick-concrete construction under the tunnel for long-term monitoring. Through analyzing the data, combined with the Hilbert-Huang transform (HHT) method to study the vibration response law of the building .The results show that The vibration velocity decreases first and then increases slightly with the rise of the floor, showing amplification effect on the top floor. The vertical peak vibration velocity cannot reflect the vibration of the high-rise building. The Hollow effect is the most significant in the range of 3~10m from the tunnel face , the vibration velocity in excavated area is greater than that in unexcavated area. The maximum vibration velocity appears in the range of 3~10m from the tunnel face, showing the Maximum vibration effect.The Hilbert spectrum of the vertical blasting vibration signal presents an obvious multi-peak structure, with a frequency ranging from 20 to 250 Hz. The frequency range of the excavated area is lower than that of the unexcavated area. The research results have reference value for tunnel blasting vibration control and building protection.

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丁新宇,王海亮,李延民,等. 隧道爆破作用下建筑物振动响应分析——以青岛地铁四线大断面隧道为例[J]. 科学技术与工程, 2021, 21(35): 15215-15221.
Ding Xinyu, Wang Hailiang, Li Yanmin, et al. Study on the Vibration Laws of Buildings in Large Section Tunnel Blasting[J]. Science Technology and Engineering,2021,21(35):15215-15221.

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  • 收稿日期:2021-07-05
  • 最后修改日期:2021-10-09
  • 录用日期:2021-08-30
  • 在线发布日期: 2021-12-20
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