从管段分节、起浮与干舷、抗浮、结构强度及连接技术方面对沉管隧道主体结构设计进行了论述，提出了各部分的设计思路、影响因素和计算方法，总结了在沉管隧道主体结构设计时认识到的关键技术，可为今后的沉管隧道主体结构设计提供参考。

In the paper, the author expatiates on the design of the main body structures of immersed tunnels in respect of tube length determination, floating and freeboard, buoyancy resistance, structural strength and joint connection technology, presents the design concepts, influence factors and calculation methods of each part of immersed tunnels and summarizes the key technologies obtained in the design of the main body structures of immersed tunnels. The paper can provide reference for the design of the main body structures of immersed tunnels in the future.