Method for re cutting concrete structure and jig for re cutting of concrete structure

摘要

PROBLEM TO BE SOLVED: To re-drill in overlapping relation with an already drilled hole.;SOLUTION: A first hole 10 is drilled in a concrete structure C in a first drilling step. In a re-drilling jig insertion step, a re-drilling jig 1A having an abutting portion 2 in contact with an inner peripheral surface 11 of the first hole 10 and a supporting portion 3 supporting a side surface 33 of a drilling tool 30 is inserted into the first hole 10 drilled in the first drilling step. In a second drilling step, while supporting the side surface 33 of the drilling tool 30 by the supporting portion 3 of the re-drilling jig 1A inserted into the first hole 10 in the re-drilling jig insertion step, an inner peripheral surface 21 of a second hole 20 newly re-drilled on the inner peripheral surface 11 of the first hole 10 overlaps with the first hole 10 so as to intersect, and the second hole 20 is drilled by the drilling tool 30. Escape of the drilling tool 30 to the already drilled first hole 10 is prevented by the re-drilling jig 1A supporting the side surface 33 of the drilling tool 30 by the supporting portion 3. As a result, re-drilling can be performed in overlapping relation with the already drilled hole.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2018,JPO&INPIT