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    中国百强科技报刊

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    Volume 46 Issue 6
    Jun.  2021
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    Article Contents
    Ren Lei, Zhu Ying, Cui Tianlin, 2021. Study on Protection Scheme of Shield Tunnel Passing through Railway Bridge Pile at a Short Distance. Earth Science, 46(6): 2278-2286. doi: 10.3799/dqkx.2021.041
    Citation: Ren Lei, Zhu Ying, Cui Tianlin, 2021. Study on Protection Scheme of Shield Tunnel Passing through Railway Bridge Pile at a Short Distance. Earth Science, 46(6): 2278-2286. doi: 10.3799/dqkx.2021.041

    Study on Protection Scheme of Shield Tunnel Passing through Railway Bridge Pile at a Short Distance

    doi: 10.3799/dqkx.2021.041
    • Received Date: 2021-01-02
    • Publish Date: 2021-06-15
    • A shield tunnel of Zhengzhou Metro passes through the existing pile foundations of railway bridge at ultra close distance.Due to the limitation of ground space and clear distance between tunnel and bridge pile, conventional protection measures such as isolation pile cannot be adopted.In this paper, three protection measures are put forward, which are "soil grouting reinforcement within the scope of shield passing", "bridge cap reinforcement" and "grouting + bridge cap reinforcement". By means of numerical simulation, the deformation law of bridge piles under different protection measures was analyzed.The results show that the maximum settlement of the bridge deck can be reduced by about 45% by adopting the measures of "grouting + bridge cap reinforcement", besides, the uneven settlement of bridge deck in transverse direction and horizontal displacement of bridge pile can be significantly reduced.

       

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