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首页> 外文期刊>Mathematical Problems in Engineering >Three-Dimensional Ground Settlement Induced by Metro Tunnel Excavation Considering the Influence of Group Piles
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Three-Dimensional Ground Settlement Induced by Metro Tunnel Excavation Considering the Influence of Group Piles

机译：考虑群桩影响的地铁隧道开挖引起的三维地面沉降

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摘要

Considering the influence of group piles, a prediction model for three-dimensional ground surface settlement induced by circular metro tunnels excavation in incompressible rock masses is proposed based on the stochastic medium theory and the shear displacement method. The surface settlement caused by the metro tunnel opening is divided into two parts. One part is soil mass settlement caused by the metro tunnel opening and calculated by the stochastic medium theory. The other part is the settlement induced by the friction force between the group piles and the soil mass around the metro tunnel cross section and calculated by the shear displacement method. The three-dimensional prediction of the ground surface settlement is obtained by the linear superposition of the two parts. The validation of the proposed prediction approach is proved by comparing with the measured data and the numerical model of the double tunnels under the Puyuan overpass where metro tunnels undercrossed group piles. The effects of buried depth, radial convergences, center distance of double tunnels, position and size of piles, and group piles are analyzed and discussed. The improved prediction approach can be applied to calculate the three-dimensional ground settlement, especially for the metro tunnels crossing through group piles.
机译：考虑到群桩的影响，基于随机介质理论和剪力位移法，提出了圆形地铁隧道在不可压缩岩体中开挖引起的三维地表沉降预测模型。地铁隧道的开放造成的地表沉降分为两部分。其中一部分是地铁隧道的通行引起的土壤质量沉降，并通过随机介质理论进行计算。另一部分是地铁隧道断面周围群桩与土体之间的摩擦力引起的沉降，并通过剪切位移法计算得出。通过两部分的线性叠加可以获得地表沉降的三维预测。通过与地铁隧道穿越群桩的metro原立交桥下双线隧道的实测数据和数值模型进行比较，验证了所提预测方法的有效性。分析和讨论了埋深，径向收敛，双隧道中心距离，桩的位置和大小以及群桩的影响。改进的预测方法可用于计算三维地面沉降，特别是对于穿越群桩的地铁隧道而言。

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  • 来源
    《Mathematical Problems in Engineering》 |2016年第5期|4964191.1-4964191.13|共13页
  • 作者

    Jin-feng Zou; Yan-jun Zhang; Han-cheng Dan;

  • 作者单位

    Cent S Univ, Sch Civil Engn, 22 Shaoshan South Rd, Changsha 410075, Hunan, Peoples R China;

    Cent S Univ, Sch Civil Engn, 22 Shaoshan South Rd, Changsha 410075, Hunan, Peoples R China;

    Cent S Univ, Sch Civil Engn, 22 Shaoshan South Rd, Changsha 410075, Hunan, Peoples R China;

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