FLOATING PREVENTION STRUCTURE OF TEMPORARY FLOATING COFFERDAM

摘要

PROBLEM TO BE SOLVED: To provide a floating prevention structure of a temporary floating cofferdam that can be formed in a limited working space and can effectively utilize an upper space of a temporary cofferdam structure.SOLUTION: A floating prevention mechanism 65 is installed in an upper part of a top end 18 of an end part 17 of a temporary cofferdam structure 1 installed to a wall surface 68 of a dam 69, and a temporary cofferdam structure 2 is formed. The floating prevention mechanism 65 comprises: a floating prevention anchor 73 secured to the wall surface 68 of the dam 69; a shoe part 71 disposed between the floating prevention anchor 73 and the top end 18 of the temporary cofferdam structure 1; a slide plate 77 provided between the shoe part 71 and the top end 18 of the temporary cofferdam structure 1, and enabling horizontal movement of the temporary cofferdam structure 1; and a hanging rod 75 for connecting the top end 18 of the temporary cofferdam structure 1 with the floating prevention anchor 73. The shoe part 71 is disposed along the wall surface 68 of the dam 69, and a formation length 76 of the shoe part 71 from the wall surface 68 is shorter than the length from the wall surface 68 to the center of buoyancy of the temporary cofferdam structure 1.