US Patent 11313099 Flexible joint connecting device of precast body segment, precast body segment joining-type underwater tunnel construction method using same, and underwater tunnel constructed thereby

The present disclosure relates to: a flexible joint connecting device used for sequentially coupling precast concrete segments so as to construct an underwater tunnel; an underwater tunnel construction method using the flexible joint connecting device so as to join, in a watertight manner, tunnel modules and integrally connect same, thereby constructing the underwater tunnel; and the underwater tunnel constructed by the construction method.