近接桩基开挖时盾构隧道断面收敛模式研究

doi:10.3724/1000-6915.jrme.2024.0701

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摘要为揭示近接桩基施工的盾构隧道土体开挖变形规律，建立开挖断面收敛模型，开展盾构隧道近接桩基开挖的室内模型试验。基于自主研制的隧道断面土体位移监测装置采集的数据，分析不同工况下开挖断面土体变形规律，提出非均匀收敛模式的隧道断面损失轮廓，基于复变函数理论建立隧道开挖损失断面Laurent级数的映射函数表达式。研究结果表明，隧道拱底地层损失与拱顶相比存在滞后现象，邻近在役桩基对隧道断面周围土体的变形存在明显的约束作用，隧道开挖损失断面计算值与实测值的对比结果验证该映射函数计算方法的合理性。

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	张乾青1
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	刘景航1
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	王茂林1
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	刘善伟1
	2

关键词 ：隧道工程, 邻近在役桩, 断面收敛模式, 断面损失轮廓, Laurent级数

Abstract：To reveal the deformation characteristics of soil in the shield tunnels section during proximity pile foundation excavation and to establish the convergence model for the tunnel excavation section. A model test of shield tunnel excavation adjacent to piles was carried out in this paper. Based on the data collected using a developed monitoring device for soil displacement in the tunnel section，the soil deformation law of excavation section under various conditions was analyzed. Additionally，a loss contour for the tunnel section exhibiting a non-uniform convergence mode was proposed. A mapping function expression for the Laurent series of the tunnel excavation loss section was established based on the theory of complex functions. The results indicated that the deformation of the tunnel arch bottom lagged behind that of the tunnel vault，and the deformation of the soil around the tunnel section was restrained by the adjacent piles. Comparisons between the calculated and measured values were made to evaluate the validity of the mapping function expression for the tunnel excavation loss section.

Key words： tunnelling engineering adjacent pile convergence mode of excavation section section loss contour Laurent series

引用本文:

张乾青1，2，刘景航1，2，王茂林1，2，刘善伟1，2. 近接桩基开挖时盾构隧道断面收敛模式研究[J]. 岩石力学与工程学报, 2025, 44(5): 1180-1190.
ZHANG Qianqing1，2，LIU Jinghang1，2，WANG Maolin1，2，LIU Shanwei1，2. Study on the convergence mode of shield tunnel section during proximity pile foundation excavation. , 2025, 44(5): 1180-1190.

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https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2024.0701 或 https://rockmech.whrsm.ac.cn/CN/Y2025/V44/I5/1180

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