Longitudinal deformation pattern of shield tunnel structure and analytical models: a review

DOI Web Site 参考文献4件
  • Cui Qing-Long
    State Key Laboratory of Ocean Engineering, Department of Civil Engineering, Shanghai Jiao Tong University
  • Wu Huai-Na
    State Key Laboratory of Ocean Engineering, Department of Civil Engineering, Shanghai Jiao Tong University
  • Xu Ye-Shuang
    State Key Laboratory of Ocean Engineering, Department of Civil Engineering, Shanghai Jiao Tong University
  • Shen Shui-Long
    State Key Laboratory of Ocean Engineering, Department of Civil Engineering, Shanghai Jiao Tong University

抄録

This paper gives a general review on the deformation pattern of the longitudinal structure of shield tunnel and the existing analytical models. Based on the previous studies, two longitudinal deformation modes are identified: i) bending deformation mode, and ii) dislocation mode. The longitudinal deformation of tunnel should consist of both flexural deformation under bending and dislocation between segmental rings under shear force. The existing analysis models of longitudinal structure mainly include i) segment ring-joint model and ii) longitudinal equivalent continuous model. The former can theoretically reflect the features of the tunnel structure. However, it is difficult to be applied in tunnel analyses as some of the parameters (e.g. joint stiffness) are difficult to determine in engineering practice and the calculation is very complicated. By contrast, the longitudinal continuous model is clearer in concept and simpler in calculation, which makes it widely adopted by researchers. The existing longitudinal continuous model follows the Euler-Bernoulli theory and therefore only considers the flexural deformation under bending; the dislocation between segmental rings is not taken into account. Elastic foundation model is widely used in the analysis of the interaction of tunnel and soil. Typical elastic foundation models include Winkler model, elastic continuous medium model, and two-parameter model. Winkler model is the most popular model due to its simplicity in calculation. Two parameters model, which considers the continuity of soil, is more accurate than Winkler model.

収録刊行物

参考文献 (4)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ