沉管式隧道一种建造隧道的方法。这种方法只适用于建造海底隧道或水底隧道。

1. 用挖泥船挖掘海床
2. 用拖船将沉管式隧道组件拖到预定位置
3. 沉降在地基上
4. 用锁紧物料巩固组件
5. 在沉管式隧道组件周围回填物料
6. 放置保护石层保护组件
7. 修复海床

注：建造水底隧道无需修复海床

An immersed tube is a kind of underwater tunnel composed of segments, constructed elsewhere and floated to the tunnel site to be sunk into place and then linked together. They are commonly used for road and rail crossings of rivers, estuaries and sea channels/harbours. Immersed tubes are often used in conjunction with other forms of tunnel at their end, such as a cut and cover or bored tunnel, which is usually necessary to continue the tunnel from near the water's edge to the entrance (portal) at the land surface.