CUTOFF FLOW CHANNEL FORMATION METHOD FOR UNDERGROUND CONTINUOUS WALL AND CUT-OFF METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method capable of easily forming a cut-off flow channel at a construction joint part and an embedment lower end of an underground continuous wall.;SOLUTION: A foam molding columnar member 4 foam-molded in a columnar shape is installed substantially horizontally along a bottom surface of a dug groove, and the foam molding columnar member 4 is installed substantially vertically up to a lower end along a concrete construction joint surface of the dug groove. After the lower end of the foam molding columnar member 4 on the construction joint surface is connected to an end part of the foam molding columnar member 4, concrete is cast into the dug groove, and a solvent is injected from an upper end of the foam molding columnar member 4 on the construction joint surface after the concrete is hardened to dissolve up to the foam molding columnar member 4 on a bottom surface with the solvent from the foam molding columnar member 4 on the construction surface, thereby forming a substantially horizontal cut-off flow channel along the bottom surface continuously from a substantially vertical construction joint surface flow channel along the construction joint surface to a substantially horizontal bottom surface flow channel 6.;COPYRIGHT: (C)2016,JPO&INPIT