| 摘要 |
PROBLEM TO BE SOLVED: To prevent excessive stress concentration on a pile of high axial force, by equalizing burden shearing force of respective pile bodies, by coping with excessive extraction force caused in the pile bodies of a building side part in an earthquake. SOLUTION: This pile head joining structure has a spherical seat 4 fixed to an upper end surface of a pile head part 2a between the pile head part 2a and an upper structure 1 and having a spherical surface-shaped sliding surface 4c, and interposes a stress reducing device 3 for allowing relative rotation while transmitting the axial force between the pile head part 2a and the upper structure 1. A transmission member 12 is composed of a lower side transmission member 13 fixed to the pile head part 2a and an upper side transmission member 14 fixed to the upper structure 1, and is interposed around the stress reducing device 3 between the pile head part 2a and the upper structure 1. Vertically mutually hooking hook claw parts 15 and 17 are respectively formed in the lower side transmission member 13 and the upper side transmission member 14. A mutually hooking surface of the hook claw parts 15 and 17 forms a part of a virtual spherical surface A' of a concentric ball with the spherical surface-shaped sliding surface 4c. COPYRIGHT: (C)2006,JPO&NCIPI
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