| 摘要 |
PROBLEM TO BE SOLVED: To provide a replacing construction method for safely proceeding work by largely securing bridge width of an existing bridge for obtaining temporary opposite passing traffic lanes without interrupting traffic during a period from partial dismantling of the existing bridge to erection completion of a new bridge. SOLUTION: The replacing construction method secures the opposite passing traffic lanes in a plurality of traffic lanes 6 of one hand of the existing bridge, erects a first newly set girder 9 by removing a width range W1 of one traffic lane part in a plurality of closed traffic lanes of the other hand, moves a one-hand traffic lane of the opposite passing traffic lanes to the first newly set girder, next, erects a second newly set girder 14 by removing a width range W2 of the other hand of the existing bridge, moves the other-hand traffic lane of the opposite passing traffic lanes on the second newly set girder, secures upper and lower side opposite passing traffic lanes from the first and second newly set girders, and erects similar third and fourth newly set girders on a residual removal trace of the existing bridge. COPYRIGHT: (C)2005,JPO&NCIPI
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