ABSTRACT
The Submerged Floating Tunnel (SFT, also known as Archimede’s Bridge) is an innovative structural solution for the realization of waterway crossings, It essentially consists of a tubular structure placed underwater at an appropriate depth, fixed in position through anchorage cables linked to the seabed. Owing to the positive residual buoyancy (i.e. the buoyancy overcomes the weight of the tunnel) the anchorage cables are in tension, thus acting as an effective restrain condition when the tunnel is subjected to environmental actions, such as hydrodynamic and seismic ones.
