WORK CAISSON

摘要

PROBLEM TO BE SOLVED: To provide a work caisson formed into a work object with a planar square shape and having excellent adhesiveness at corner sections. SOLUTION: A pair of assembly units 2 are connected together by a hinge 3 and rotated around the hinge 3 to form a planar square annular body, and a water stop tube 4 having a square cross section is provided along the inner face of its lower section.