Final V-Block Segment for Immersed Tube Tunnel

Construction of submerged tube tunnels necessitates the final closure and sealing of the gap using a final joint. In order to accomplish this challenging task, the V-Block construction method, developed by Penta-Ocean, involves the preparation of the final tunnel segment to be built on shore at quality-controlled yards, which is then transported to the site and lowered into place by a large floating crane. Water tightness is achieved owing to forces generated by the difference between the upward and downward water pressure, in addition to the weight of the V-Block itself. Following installation, the V-Block and the adjacent tunnel tubes on both sides are permanently connected.