This paper describes the development process for tension legs type Submerged Floating tunnels (SFT) in shallow water. SFT is a completely new type of tunnels, unlike anything ever seen before. SFTs have attacked attentions as a new access to solve the problems not adequately dealt with by conventional structures. But, there are still many unknown factors, as no such structures.
Therefore, Hokkaido University, Hokkaido Development Bureau and the Society Submerged Floating Tunnel Technology Research have studied on SFT technology, such as, design methods, tunnel structure, mooring systems, foundations, its construction in this several years. So, we are able to develop the design and construction methods for tension legs type Submerged Floating tunnels in shallow water.
