| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of base-isolating an existing building at low cost and in a short period of construction work by simplified processes. SOLUTION: The lower portion of a foundation 3 of an existing building 1 is dug so that an existing pile 4 is exposed and a new foundation 10 is placed at the bottom of the dug part in such a manner as to wrap the existing pile 4. The foundation 3 is supported by support 12 on the new foundation 10 and the existing pile 4 is cut. A mat slab 13 (base-isolated foundation) is placed to continue with both an additional pile 11 newly provided adjacent the existing pile 4 and the new foundation 10, and a base isolation device 15 is installed between the mat slab 13 and the foundation 3 to support the foundation 3. Thereafter, the support 12 is removed and the existing building 1, together with a bearing part 17 serving as a component member above the base isolation device 15, is moved to the upper portion of the additional pile 11 along a slide plate 16 which is a component member below the base isolation device 15 fixed on the mat slab 13.
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