| 摘要 |
PURPOSE: To cope with a short-sized erection girder, and to improve workability and profitability by devising the bearing and moving methods of an erection girder in the erection method of a bridge by a method of cantilever erection precast block construction. CONSTITUTION: Blocks 3 are built and joined left and right alternately or simultaneously by utilizing an erection girder 11, and projected gradually while giving prestress. Erection work during a single span is completed, and a front leg is retreated along the erection girder 11, and moved onto a bridge girder 2, which is built perfectly. The erection girder 11 is borne by a rear leg 34 and the front leg 32, and a launching leg 33 is moved up to the place of the front leg 32. The erection girder 11 is borne by the rear leg 34 and the launching leg 33, the erection girder is forwarded, and the front leg 32 is shifted up to a next built pier 1. The launching leg 33 is moved up to the upper section of the pier 1, on which the front leg 32 is fixed temporarily. The erection girder 11 is sent out second. |
