| 摘要 |
PROBLEM TO BE SOLVED: To provide a construction method for extending a lower story, such as a first floor section, of a relatively low-rise existing building by pushing up an upper story section higher than the lower story. SOLUTION: The building 2 above the extended floor is supported by a supporting means, and an existing column of the extended floor is cut in a position near an upper end. A column on a lower side with respect to a cutting position is covered with column members 6 and 6'; an upper end of a column member is joined to a column on an upper side with respect to the cutting position; and an upper building is supported by the column member. The column members are connected to each other by a beam; a jack 9 is connected to a reaction implement 10 which is provided in the beam or the column member; and the upper building is made to ascend to the limit of preventing the column member from coming off from the lower-side column 4b. The exposed lower-side column is covered with the column member; the upper end of the column member is joined to a lower end of the upper column member; and an upper building is supported by the column member. The jack is reconnected to the reaction implement which is provided in the beam or the lower-side column member, and the upper building is made to ascend to the limit of preventing the column member from coming off from the lower-side column. Concrete is infilled into the column member so as to be integrated with the upper-side and lower-side columns. COPYRIGHT: (C)2005,JPO&NCIPI
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