Patent ID: 7185954
Filing Date: 2007-03-06
Classification: E01D,E04G

Abstract:
1. A method for removing a part of concrete construction that comprises a base concrete; a reinforced concrete formed on said base concrete from which at least a segment of said reinforced concrete is removed; and rebars embedded in said base concrete and upwardly extending through said reinforced concrete; the method comprising the steps of: forming a slit in said reinforced concrete and disconnections at an intermediate of said rebars to form said segment of said reinforced concrete wherein said slit extends from a top surface of the reinforced concrete slightly above a boundary plane between said base concrete and reinforced concrete or down to said base concrete, wherein said slit also extends transversely to the moved direction of said segment, and wherein said slit is formed in the vicinity of a rear end of the reinforced concrete; applying an expansion force on opposite surfaces of said slit in said reinforced concrete or if available on opposite cut ends of the disconnections of said rebars; thereby moving one of said opposite surfaces of said slit away from the other of said opposite surfaces to move said segment in the predetermined moved direction once or several times, while simultaneously breaking said boundary plane to separate the segment from the base concrete into a scrap, and removing the scrap from the base concrete.