盾构隧道高性能拼连同步式管片接头的联动控制及性能优化研究

管片接头的御灾能力直接影响盾构隧道衬砌结构的力学行为和安全性，而现有接头形式在大变形、高水压和强震作用等特殊条件下病害频发、适应性差。本项目拟采用模型试验、数值模拟和理论分析等方法解决盾构隧道高性能拼连同步式管片接头的联动控制机理及性能优化等关键科学问题：①研究拼连同步式管片接头的构造性能和联动控制机理，建立接头性能评价体系；②构建三维实时动态可视化模型，结合模型试验分析大变形及高水压下拼连同步式接头构件的空间异变特征，揭示错台量、张开量与接头破坏模式、力学特性及防水性能的映射关系；③开展多维地震激励下拼连同步式管片接头动力响应研究，提出叠层消能体系的附加阻尼比计算模型；④通过拼连同步式管片接头性能的影响因素广域参数分析，利用深度学习提出考虑多因素耦合的接头性能预测和优化模型。本研究成果可为盾构隧道高性能拼连同步式管片接头设计和应用提供理论基础，对提高盾构隧道主动御灾能力具有指导意义。

The disaster resistance of segment joint directly affects the mechanical properties and safety of shield tunnel lining. However, the existing joint types suffer from frequent diseases and poor adaptability under special conditions such as large deformation, high water pressure and strong earthquake. By means of modeling experiment, numerical simulation and theoretical analysis, the following key scientific issues of the linkage control mechanism and performance optimization of high-performance synchronized joint for shield tunnel segmental lining will be solved: a) The structure properties and linkage control mechanism of the synchronized segment joint will be studied, and the performance evaluation system of synchronized joint will be established. b) A three-dimensional real-time dynamic visualization model will be set up, and the spatial variability characteristics of synchronized joint members will be analyzed under large deformation and high water pressure with model test. Meanwhile, the mapping relationship between dislocation, opening with failure mode, mechanical properties and waterproof performance of the joint will be revealed. c) The dynamic response of synchronized segment joint under multi-dimensional seismic excitation will be studied, and the additional damping ratio calculation model of laminated energy dissipation system will be proposed. d) With wide-area parameter analysis of influencing factors for synchronized segment joint performance, the model for joint performance prediction and optimization with multi-factors coupling will be raised based on in-depth learning. The results in this study will provide theoretical basis for the design and application of high-performance synchronized joints for shield tunnel segmental lining. All of these have guiding significance for improving the active disaster resistance ability of shield tunnels.