The submerged floating tunnel (SFT) is an innovative traffic structure used tocross a strait, a bay, a fiord, a lake or other appropriate waterways. The mainstructural members of an SFT are submerged connected tubes, which are kept atsome depth below the water surface by the balance between the downward load andthe buoyancy force and with the aid of a specialized support system. The advantagesof the SFT are1. The total length of an SFT is noticeably shorter than that of any ordinary submarine tunnel;2. ...