| 摘要 |
PROBLEM TO BE SOLVED: To simplify a cutout formed in a concrete structure by reducing a protective concrete layer thickness, by shortening projecting lengths of tips of an anchoring tool and a tensional material from the bearing surface of the concrete structure, in the anchoring tool of the tensional material for introducing prestress into the concrete structure. SOLUTION: A threaded part formed at the end of the tensional material 1 is screwed in up to about a half of the length of a long nut 2 on the inner peripheral surface of the long nut 2 having a thread on the inner peripheral surface and the outer peripheral surface. The thread of the outer peripheral surface of the long nut 2 is screwed in a thread formed on the inner peripheral surface of a through-hole of a bearing plate 3, and the bearing plate is allowed to abut on the end surface of the concrete structure 4. Thus, the tension of the tensional material 1 is transmitted to the concrete structure 9 via the long nut 2 and the bearing plate 3. The tensing of the tensional material 1 is performed by installing a center hole jack in an extension steel material screwed in from the opposite side of the long nut 2, and the bearing plate 3 is rotated and fastened in a state of introducing a tensional force into the tensional material. COPYRIGHT: (C)2006,JPO&NCIPI
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