| 摘要 |
PROBLEM TO BE SOLVED: To make construction in a state that adverse effects to the surrounding can hardly be caused hardly restricted by a structure of a new overground structure, and to allow reconstruction work to be efficiently carried out. SOLUTION: A reconstruction method of a structure is for replacing an existing underground structure A1 with a new underground structure B1 by a top-down construction method. A plurality of piles 1a are integrally driven under an existing bottom plate 3 and made resistant to extraction against water pressure acting on the existing bottom plate 3. Upper parts of the plurality of the piles 1a and framed-stud permanent substructual columns 1 are made to be integrated with one another, and a vertical support 2 is installed between the existing bottom plate 3 and the vicinity of the floor A1a of an existing first basement to resist the water pressure. The first basement of an existing overground demolition residue G is removed while demolishing the floor A2a of an existing first floor, and the vertical support 2 is extensively installed between the existing bottom plate 3 and the floor B2a of a new first floor by adding a new support to the existing support accompanied by the construction of the floor B2a of the new first floor of a new overground structure B2. Thereafter, the existing underground structure A1 deeper than the floor A1a of the existing first basement is replaced by the new underground structure B1. COPYRIGHT: (C)2009,JPO&INPIT
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