浅埋偏压双孔隧道开挖顺序优化研究
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U455

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Study on optimization of excavation sequence of shallow-buried bias pressure double-hole tunnel
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    摘要:

    为研究先行洞优先原则与 CRD 法开挖顺序相结合对浅埋偏压双洞隧道围岩的影响,提出合理的隧道开 挖顺序。以重庆某隧道工程为依托,采用 Midas/GTS 软件建立了二维有限元隧道模型,分析了右洞先行且先开挖 右侧、右洞先行且先开挖左侧、左洞先行且先开挖右侧、左洞先行且先开挖左侧等 4 种不同开挖方案的主应力分 布情况。研究结果表明:采用右洞先行且先开挖左侧的开挖顺序时隧道围岩的位移和应力最小,该开挖方案最佳, 以期为类似隧道施工提供借鉴。

    Abstract:

    To study the influence of the first tunnel priority principle and the CRD excavation sequence on the surrounding rock of shallow-buried bias pressure double-tunnel tunnel, a reasonable tunnel excavation sequence was put forward. Based on a tunnel project in Chongqing, a two-dimensional finite element tunnel model was established by using Midas/GTS software, and the principal stress of four different excavation schemes, namely right hole with right first excavation, right hole with left first excavation, left hole with right first excavation, and left hole with left first excavation, were analyzed respectively. The results show that the excavation scheme of right hole with left first excavation minimizes the displacement and stress of surrounding rock, and the excavation scheme is the best. The results can provide references for similar tunnel construction.

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李扬 ,费维水 ,刘文连 ,等.浅埋偏压双孔隧道开挖顺序优化研究[J].交通科学与工程,2021,37(1):82-88.
LI Yang, FEI Wei-shui, LIU Wen-lian, et al. Study on optimization of excavation sequence of shallow-buried bias pressure double-hole tunnel[J]. Journal of Transport Science and Engineering,2021,37(1):82-88.

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  • 在线发布日期: 2022-06-06
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