| 摘要 |
PROBLEM TO BE SOLVED: To provide a tower construction method for an observation tower, which is constructed by dispensing with a large scale crane and using only minimum necessary heavy equipment, and contributes to reduction of a work yard in an observation tower construction field and minimization of using area in peripheral roads, to thereby minimize an influence on a peripheral area. SOLUTION: The tower construction method is composed of an elevating first step and an elevating second step. In the elevating first step, an elevating apparatus 7 is supported by a support bent 8 and extended to elevate the tower 3, followed by inserting a tower forming member 4 making up a unit forming the tower 3, into an area under the elevated tower 3, to thereby couple the tower 3 and the tower forming member 4 with each other. In the second elevating step, the elevating apparatus 7 is supported by the tower 3 and contracted to elevate the support bent 8, followed by inserting a support bent forming member 9 making up a unit forming the support bent 8, into an area under the elevated support bent 8, to thereby couple the support bent 8 and the support bent forming member 9 with each other. Thus by repeatedly carrying out the elevating first step and the elevating second step, the tower 3 is constructed. COPYRIGHT: (C)2008,JPO&INPIT
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