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首页> 外文期刊>Tunnelling and underground space technology >3D response analysis of a shield tunnel segmental lining during construction and a parametric study using the ground-spring model
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3D response analysis of a shield tunnel segmental lining during construction and a parametric study using the ground-spring model

机译：盾构隧道分段衬砌施工期间的3D响应分析以及使用地弹簧模型的参数研究

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摘要

In this research, an analysis method aiming as a tool to investigate the behavior of a tunnel lining during construction is developed based on a nonlinear ground-spring model in conjunction with a finite element method. A nonlinear ground-spring model that considers yield pressures is proposed and implemented into the numerical analysis. All relevant components of the shield tunnel construction process including the TBM, jack thrust force, shield tail wire brush, segmental lining, key-segment and ring and segment joints and proper interactions are considered in the analysis model. The reliability of the developed method is verified by comparing the analysis results with the full-scale test and field measurements of a previous study. The developed analysis method could reasonably reproduce the responses of a segmental lining at various stages with special attention during construction. A series of parametric analyses are conducted to highlight the robustness of the developed method to capture the effect of the key factors on the structural behavior of the segmental lining during construction. The effects of the tunnel depth, forces from eccentric jack thrust together with shield tail wire brush and position of key segment on the induced lining stresses can be well captured.
机译：在这项研究中，基于非线性地弹簧模型并结合有限元方法，开发了一种旨在研究隧道衬砌在施工过程中的行为的分析方法。提出了一种考虑屈服压力的非线性地弹簧模型，并将其应用于数值分析。在分析模型中考虑了盾构隧道施工过程的所有相关组成部分，包括TBM，千斤顶推力，盾构尾部钢丝刷，分段衬砌，键段以及环和分段节以及适当的相互作用。通过将分析结果与先前研究的全面测试和现场测量进行比较，验证了所开发方法的可靠性。所开发的分析方法可以合理地再现分段衬砌在各个阶段的响应，并在施工期间特别注意。进行了一系列参数分析，以突出所开发方法的鲁棒性，以捕获关键因素对施工过程中分段衬砌结构行为的影响。可以很好地捕捉到隧道深度，偏心千斤顶推力和屏蔽尾钢丝刷以及关键段位置在引起的衬砌应力上的影响。

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