| 摘要 |
PROBLEM TO BE SOLVED: To prevent a large bending moment from occurring on a foundation pile by overlapping an upper structure side spherical member having a spherical face along the spherical face of a spherical face member on a foundation side spherical face part provided on the head part of the foundation pile, and having a proper friction resistance between the spherical faces. SOLUTION: The foundation side spherical face member 2 having a projection spherical face 2a is attached to the pile head 1a of the foundation pile 1 embedded in ground 5. The upper part structure side spherical face member 4 having the recess spherical face 4a of curvature along the projection spherical face 2a is arranged on the foundation side spherical face member 2. The proper friction resistance is carried by the contact interface of the projection spherical face 2a and the recess spherical face 4a. Thereby it is rigid connection structure in an intermediate and small-scaled earthquake, and during a large-scaled earthquake, it is the structure having a rotating function while a large bending moment is transmitted. In addition, the safety of the pile head 1a can be secured, the cross sectional force of the foundation pile 1 can be lessened, the foundation pile 1 can have the necessary minimum performance, and construction work is simplified.
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