深中通道沉管隧道具有高水压、大回淤、结构超大跨和建设要求高等特点，为保证沉管隧道结构在建设与运营期内的安全和耐久性，深中通道沉管隧道在世界上首次大规模采用钢壳混凝土组合结构。为推动钢壳混凝土组合结构沉管隧道在我国的发展，介绍深中通道钢壳混凝土沉管隧道结构选型、横断面设计、纵向管节划分、特殊结构构造和钢壳详细构造等技术，管节钢壳制造、拼装和运输的创新工艺，自密实混凝土浇筑技术和钢壳混凝土脱空检测方法，总结深中通道钢壳混凝土组合结构沉管隧道设计、智能制造以及施工关键技术。另外，结合深中通道沉管隧道钢壳混凝土组合结构的特点，对钢壳混凝土抗剪连接件设计、钢板件连接构造和混凝土脱空检测方法提出优化建议。
The Shenzhen-Zhongshan immersed tunnel
project (hereinafter Shenzhong Link) faces significant technical challenges,
including high-water pressure, hazardous back-silt issues, long-span structural design,
and high construction requirements. To ensure the project′s safety and durability during construction and operation periods, a
novel steel-shell concrete combination structure is
adopted. For the Shenzhong Link steel-shell concrete
immersed tunnel, the techniques of structure selection, cross-sectional design, longitudinal segment division, special structure,
and detailed steel-shell structure, as well as the
manufacturing, assembling, and transportation techniques for steel-shell, self-compacting concrete-casting technique, and advanced void detection method for steel-shell concrete are introduced. The key techniques for designing,
manufacturing, and constructing immersed tunnels are summarized. Additionally,
some optimization suggestions are made for the design of the steel-shell concrete shear connector, steel plate connection structure,
and concrete void detection method, based on the characteristics of Shenzhong
Link.
