刚性支承潜浮隧道

在宽深的水域建造永久性跨海通道，始终是世界各国桥隧建设中的一大难题。刚性支承潜浮隧道方案为解决这一难题提供了一个值得关注的结构模式。刚性支承潜浮隧道采用双向受力、组合式结构的设计理念，用横向顶出式抗拔钢桩做隧道管的固定支承件，使单车道工程造价降低到不及桥梁和普通隧道的一半；而且，没有土方量，没有污染，使工程变得简单易行。以琼州海峡为例，介绍刚性支承潜浮隧道的基本结构、受力原理、施工方法、安全措施和一些关键难题的解决方法。为建造永久性跨海通道提供借鉴和参考。

Rigid-supported Submerged Floating Tunnel

Building permanent transportation corridors across vast and deep water is still a great challenge in the field of bridges and tunnels all over the world. Rigid supported submerged floating tunnel is an option to which special attention is worth to be paid. The design concept of two way force and combined structure is adopted for rigid supported submerged floating tunnels. Lateral jacked anti uplift steel piles are used as the fixing and supporting structure of the tunnel tube. The cost of the rigid supported submerged floating tunnels per lane is less than half of that of bridges and tunnels. In case of rigid supported submerged floating tunnel, no earthwork is executed and no pollution is produced. Furthermore, rigid supported submerged floating tunnels are easy to be constructed. Taking Qiongzhou strait transportation corridor as an example, the author presents the basic structure, mechanical principle, construction method, safety guarantee measures and solutions to some key problems of rigid supported submerged floating tunnels. The paper can provide reference for the building of permanent sea crossing transportation corridors in the future.