Large-scale in-sea anchorage construction combined cofferdam structure and construction method thereof

The invention discloses a large-scale in-sea anchorage construction combined cofferdam structure and a construction method thereof. The large-scale in-sea anchorage construction combined cofferdam structure is used for building a land construction platform on the sea, and comprises ring-shaped cofferdam structure formed by a plurality of locking notch steel pipe piles connected in an end-to-end mode and arranged vertically at intervals, and parallel steel wire cables sleeving the periphery of the cofferdam and used for sleeving the periphery of the cofferdam in a hooping mode to form circumferential protection and stress bearing on the inner part of the cofferdam. According to the large-scale in-sea anchorage construction combined cofferdam structure, the structure is stable, the construction period is short, the protective function on the stress generated from the inner side to the outer side in cofferdam construction can be achieved, and the combined cofferdam structure can be widelyapplied to the technical