| 摘要 |
PROBLEM TO BE SOLVED: To simplify temporary works by lengthening the span of a bridge having hollow section. SOLUTION: One span is divided into the three sections of an intermediate section and both-side sections, and the intermediate section is constructed in the composite structure of a girder member 1 made of precast concrete and a cross section, in which a section lower than cast-in-place concrete placed between the upper end sections of the adjacent girder members 1, 1 in the cross direction is opened. Both-side sections are built by hollow sections, in which sections lower than cast-in-place concrete 6 are closed, and all sections are unified by PC cables 7.
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