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VOLUME LOSS CAUSED BY OPEN-FACE SHIELD TUNNELLING ON THE JUBILEE LINE EXTENSION

机译:在朱比利线延长线上的敞开式盾牌隧道造成的体积损失

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摘要

An investigation was carried out into the magnitude of undrained volume loss due to tunnelling by open-face shield in London Clay as part of PhD research concerning ground and building movement caused by tunnelling on the Jubilee Line Extension (Dimmock, 2003). The investigation was based on the volume loss observed at greenfield sections across St. James's Park (Nyren, 1998; Harris, 2001). The objective was to link particular phases of tunnel construction to resulting volume loss. One section was monitored comprehensively for both surface and sub-surface ground movement. Other sections across St. James's Park were just monitored for surface settlement. Most significantly a modification to the Load Factor Approach (Mair et al., 1981; Macklin, 1999) to estimating undrained volume loss for open-face shield tunnelling in London Clay is proposed.
机译:开展了一项有关伦敦泥中通过敞开式盾构进行隧道掘进而造成的不排水体积损失量的调查,这是有关银禧线延线隧道掘进引起的地面和建筑物移动的博士学位研究的一部分(Dimmock,2003年)。这项调查是基于在圣詹姆斯公园(St. James's Park)的绿地部分观察到的体积损失(Nyren,1998; Harris,2001)。目的是将隧道施工的特定阶段与造成的体积损失联系起来。全面监视了一个区域的地面和地下地面运动。整个圣詹姆斯公园的其他部分都受到了地面沉降的监测。最重要的是,提出了对荷载因数法(Mair等,1981; Macklin,1999)的一种修改,以估算伦敦粘土中的敞开式盾构隧道的不排水体积损失。

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