| 摘要 |
PROBLEM TO BE SOLVED: To perform construction while accurately holding a horizontal level, when placing concrete in the final stage, in an overhanging installing construction method for performing construction by repeating an overflow by lifting an overhang tip part. SOLUTION: This installing construction method constructs a bridge girder 2 by successively overhanging a column capital 18 as a cantilever part via an existing girder block, by constructing the girder block by alternately placing the concrete on both sides in the bridge axis direction from the column capital part 18 of a pier 6. This displacement adjusting method in the overhanging installing construction method of a concrete girder, is characterized by holding the height of a new girder block constant in a tip part 20 by overhanging by removing a load of a counterweight so as to offset displacement of the tip part 20 by overhanging by a load increase caused by placing the concrete, by arranging the counterweight having weight adjusted to the planned height just after placing the concrete in the overhanging tip part 20, before placing the concrete of the new girder block. COPYRIGHT: (C)2005,JPO&NCIPI
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