COFFERDAM STRUCTURE AND CONSTRUCTION METHOD FOR THE SAME

PROBLEM TO BE SOLVED: To enable a reduction in underwater work, and to enable a fixation state to a support member to be easily and visually recognized from the outside.SOLUTION: A cofferdam structure includes: a lower support frame 2 which is fixedly provided on a wall surface H at a peripheral edge of an opening of a water intake 110 of a dam body 11; a plurality of loading units 5A-5D which are configured into a cylindrical body 6 by being loaded along the height direction of the wall surface H in the lower support frame 2 so as to form a working space W between surrounding water and the wall surface H; and an upper support frame 7 which is fixedly provided on the wall surface H positioned on the water and to which the uppermost loading unit 5D positioned on the water is fixed.