Cofferdam structure applied to pier construction

The utility model provides a cofferdam structure applied to pier construction. Relating to the technical field of cofferdams, the cofferdam comprises a plurality of steel sheet piles and a plurality of supporting assemblies, the steel sheet piles are spliced to form a cofferdam body, each supporting assembly comprises an installation track, a supporting column and a bayonet socket, each installation track comprises two single-side tracks, the two single-side tracks are arranged on the inner walls of every two adjacent steel sheet piles respectively, and an insertion sliding way is formed between every two single-side tracks; the supporting column comprises a supporting positioning block and an inserting block, the inserting block is slidably connected with the inserting slideway, and a connecting groove is formed in the bottom of the inserting block; the bayonet socket comprises a bayonet socket body, an embedding block and a positioning protruding thorn. According to the cofferdam structure applied to bridge