| 摘要 |
PROBLEM TO BE SOLVED: To provide a base isolation construction method for an existing building in which a regular business in the building is not impeded, a base isolation device can be easily installed at any position of an axial member, and the base isolation of the building can be realized in a short time in a simple work. SOLUTION: In this base isolation construction method for the existing building, additional concrete 12 is place on upper and lower portions of the outer periphery of an axial member 11 leaving behind a range in which at least a base isolation device is inserted, a sheath tube for inserting a tendon is embedded inside when the additional concrete is placed, a support plate 14 is stretched between the upper and lower additional concrete, upper and lower portions thereof are pressed against the additional concrete 12 by introducing the prestress in the tendon 15 passed through the sheath tube, a range of the axial member 11 in which the base isolation device is inserted is cut, the base isolation device 20 is inserted in a cut portion, the prestress in the tendon 15 is relieved, and the support plate 14 is removed.
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