| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a construction method for an anchor member having a high tensile strength, and a cutting tool used for the same. <P>SOLUTION: A preparation hole 6 for insertion of an anchor member is bored in an existing concrete 5 by a core bit 7, and a cutting tool which has a cross-sectionally arcuate wing 2 with one edge pivotally supported on an outer peripheral position of a central shaft 1 and in which the wing 2 is opened outward by centrifugal force of its rotation, is inserted into the preparation hole 6. When the central shaft of the cutting tool is rotated, the wing 2 is opened outward by centrifugal force from the central shaft 1, and an anchor member insertion hole 9 having a plurality of annular recessed grooves 9a at intervals is formed in the inner wall surface of the preparation hole 7 by a plurality of small piece bits 3 provided vertically at intervals on the arcuate outside surface of the wing 2. Then, the insertion hole 9 is filled with a fixation agent 10, an anchor member 11 is inserted into the insertion hole 9, and the fixation agent 10 is solidified. <P>COPYRIGHT: (C)2013,JPO&INPIT |
