CONSTRUCTION METHOD FOR UNDERGROUND CONTINUOUS WALL

PROBLEM TO BE SOLVED: To prevent breakage of concrete outflow prevention sheets by placing oppositely on excavated surfaces for reinforcing bar cage when erecting the cage in an excavated channel and by erecting the sheets in a state pulled close to the side of reinforcing bar cage. SOLUTION: A concrete outflow prevention sheets 2 are attached between end portions 12 of partition boards 11 at both ends at both sides of a reinforcing bar cage 1, and the sheets 2 are pulled to the inner side of the cage 1 by using rubber rope 21 or the like. Next, the cage 1 attached with the sheets 2 is inserted to the excavated channel 4. At that time, the sheet 2 is pulled by a rope 21 to the inner side of the cage 1, so that the sheet will not cut or have holes punched by pinching between tone channel 4 and the cage 1. Next, the rubber ropes 21 are cut, concrete is poured inside the sheets 2, the cage 1 is placed adjacently, the process for coupling the partition 11 is repeated and the underground continuous wall is constructed. By doing this, the outflow of concrete from a broken hole in the sheet to the excavated channel can be prevented and the erection of other adjacent reinforcing bar cages can be performed without any disturbance.