| 摘要 |
PROBLEM TO BE SOLVED: To provide a device capable of not only advancing the bridge girder of a planar straight line-like or a gentle planar curved line-like precast block but also coping with a steep planar curved line precast block bridge, simplifying a mechanism as compared with the conventional device in constitution and having profitability and excellent workability. SOLUTION: A girder 2 having a length over substantially three piers suspending a front fixing support 21 and a rear fixing support 22 on the horizontal end of the lower face is suspended respectively. The erection device has a frontward moving support 3 with a drive device and a rearward moving support 4 with a drive device capable of being suspended on the girder respectively to be traveled in the length direction of the girder 2 and being moved in the width direction of the girder 2, and a trolley 6 providing the suspension device of a precast block suspended capable of travelling in the length direction on the girder 2.
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