| 摘要 |
PROBLEM TO BE SOLVED: To improve extraction yield strength when shearing force acts in the 45-degree direction from a part on the concrete surface side of an expansion member positioned in a bore hole expansion hole by the expansion member of an anchor bolt tip part. SOLUTION: An anchor bolt attached with the expansion member smaller than an inlet inner diameter of a bore hole on the tip and larger than an outer diameter of an anchor bolt when positioned in the bore hole expansion hole, is inserted into the bore hole of expanding a bore hole bottom part of hardened concrete. The expansion member is positioned in the expansion hole of the bore hole. An organic injection material or an inorganic injection material is filled in a bore hole void. COPYRIGHT: (C)2007,JPO&INPIT
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