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李镜培, 王昆. 超深群桩对邻近已有隧道的影响研究[J]. 岩土工程学报, 2011, 33(sup2): 128-134.
引用本文: 李镜培, 王昆. 超深群桩对邻近已有隧道的影响研究[J]. 岩土工程学报, 2011, 33(sup2): 128-134.
LI Jing-pei, WANG Kun. Influence of extra-deep pile groups on existing neighboring tunnels[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(sup2): 128-134.
Citation: LI Jing-pei, WANG Kun. Influence of extra-deep pile groups on existing neighboring tunnels[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(sup2): 128-134.

超深群桩对邻近已有隧道的影响研究

Influence of extra-deep pile groups on existing neighboring tunnels

  • 摘要: 针对邻近高层建筑桩基础对地铁隧道的影响问题,分析超深群桩在工作荷载下对邻近土体应力状态和已有隧道沉降的影响。以改进后的剪切位移法为基础,考虑桩间加筋和遮拦效应的影响,得到刚性承台下群桩的荷载分布特性;结合 Mindlin 解和引入空隙参数的土体位移场公式,求解隧道剖面的平面应变解答。编制 Matlab 程序进行计算,对群桩与隧道的相对距离、布桩方式、荷载水平和群桩规模等因素进行分析,得出了一些有益的结论。

     

    Abstract: According to the influence of pile groups of high-rise buildings on nearby metro tunnels, the stress of neighboring soils and the settlement of neighboring tunnels caused by extra-deep pile groups under the work loading are analyzed. The load spreading property of pile groups under rigid cushion cup is obtained based on the improved shear displacement method as well as piles reinforced and shielding effects. Then the plain strain of profile of tunnels is calculated by combining the given load spreading property and the Mindlin answer and the formula of displacement field of soil. In this way Matlab programs are made to draw some useful conclusions by analyzing the influence factors for the settlement of tunnels including distance between them, collocation of piles, loading level and scale of piles.

     

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