The influence of pre-failure soil stiffness on the numerical analysis of tunnel construction
The influence of pre-failure soil stiffness on the numerical analysis of tunnel construction
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DOI：
10.1680/geot.1997.47.3.693
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发表时间：
1997-06
期刊：
影响因子：
5.8
通讯作者：
T. Addenbrooke;D. Potts;A. Puzrin
中科院分区：
文献类型：
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作者：
T. Addenbrooke;D. Potts;A. Puzrin
使用有限元法分析隧道正变得越来越普遍，但任何预测都取决于（除其他外）破坏前土壤行为所采用的模型。本文比较和对比了刚性粘土中单隧道和双隧道开挖地表移动的平面应变预测，模型为（a）各向同性线弹性理想塑性（B）各向异性线弹性理想塑性（c）剪切刚度取决于偏应变和平均有效应力的各向同性非线弹性理想塑性，以及取决于体积应变和平均有效应力的体积模量（d）采用上述（c）中的模型的各向异性非线性弹性理想塑性（e）剪切刚度和体积刚度取决于偏应变水平的各向同性非线性弹性理想塑性，平均有效应力和载荷反转。分析模拟了圣詹姆斯公园（伦敦，英国）下的银禧线延伸项目隧道的几何形状，
The use of the finite-element method to analyse tunnels is becoming more widespread, but any prediction is dependent (among other things) on the model adopted for the pre-failure soil behaviour. This paper compares and contrasts plane strain predictions of ground movement for both single- and twin-tunnel excavations in stiff clay modelled as (a) isotropic linear elastic perfectly plastic (b) anisotropic linear elastic perfectly plastic (c) isotropic non-linear elastic perfectly plastic with shear stiffness dependent on deviatoric strain and mean effective stress, and bulk modulus dependent on volumetric strain and mean effective stress (d) anisotropic non-linear elastic perfectly plastic employing the model in (c) above (e) isotropic non-linear elastic perfectly plastic with shear and bulk stiffness dependent on deviatoric strain level, mean effective stress, and loading reversals. The analyses model the geometry of the twin Jubilee Line Extension Project tunnels beneath St James's Park (London, UK), and ...