Numerical investigation of the effects of tunnelling on existing tunnels
Numerical investigation of the effects of tunnelling on existing tunnels
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DOI：
10.1680/jgeot.sip17.p.103
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发表时间：
2017-09-01
期刊：
影响因子：
5.8
通讯作者：
Standing, J. R.
中科院分区：
文献类型：
--
作者：
Avgerinos, V.;Potts, D. M.;Standing, J. R.
在海德公园北方现有的中央线隧道下方建造的横贯铁路隧道为本文提供了动力。开发了一个基本的三维（3D）有限元（FE）模型，以研究一个新的隧道（NT）垂直穿越现有隧道（ET）的一般情况。进行了一系列的三维有限元分析，本文提出的结果揭示了一些相互作用的影响。环向力，弯矩和衬砌变形的ET由于开挖的NT的变化进行了讨论。得出的结论是如何相对于ET的轴的NT的开挖面的相对位置影响后者的行为。横截面和纵向变形的ET进行了讨论，导致现场监测类似的相互作用的情况下的建议。还进行了两项参数研究，以量化土压平衡机面压力和ET的纵向刚度对由于NT施工而导致的ET预测行为的影响。
Construction of the Crossrail tunnels just beneath the existing Central line tunnels at the northern side of Hyde Park provided the impetus for this paper. A basic three-dimensional (3D) finite-element (FE) model was developed to study a general case of a new tunnel (NT) crossing perpendicularly below an existing tunnel (ET). A series of 3D FE analyses was carried out and the results presented in this paper reveal some of the interaction effects. Changes in hoop forces, bending moments and lining deformations of the ET due to excavation of the NT are discussed. Conclusions are drawn about how the relative position of the excavation face of the NT in relation to the ET's axis affects the latter's behaviour. Cross-sectional and longitudinal deformations of the ET are discussed, leading to recommendations for field monitoring of similar interaction cases. Two parametric studies were also carried out to quantify the effects of the magnitude of the earth pressure balance machine face pressure and the longitudinal stiffness of the ET on the predicted behaviour of the ET due to construction of the NT.