| 摘要 |
PROBLEM TO BE SOLVED: To extend an extension main girder between a bridge and an abutment by suspending and transferring the extension main girder to the floor slabs of the existing bridge when the extension main girder is installed in a reinforcing manner between the existing main girders of the bridge or under a juxtaposed state. SOLUTION: Extension main girders 7 as single materials are suspended from a suspension device 11 at a first stage through wires 9 and blocks 10 by suspension winches 8, and transferred successively to suspension systems 15 after the next stage in a baton pass manner by winches for transfer, and the extension main girders are transported safely. smoothly and efficiently. Steel girders are hung up and carried safely and in a stable attitude through upper flanges without laterally falling at the time of the transport of the extension main girders, the execution of works is simplified and safety is also improved, and the efficiency of the execution of works is enhanced, and cost is reduced. |
