| 摘要 |
PROBLEM TO BE SOLVED: To provide a construction method for replacing a bridge girder capable of safely, quickly, securely and inexpensively replacing the bridge girder in replacing a road bridge or a railroad bridge even in a, long, and narrow land in the direction of bridge axis by a longitudinal take-out method. SOLUTION: In this construction method, a new bridge girder 3 assembled at a work yard is longitudinally moved in the direction of bridge axis by a self-propelling bogie 10 mounted with a hydraulic jack and a rail to carry it onto the existing bridge girder 2 and is supported by a temporary receiving saddle and a temporary receiving member 11 of the hydraulic jack, the existing bridge girder 2 is laterally moved by a lateral take-out rail and the self-propelling bogie for temporary evacuation into a side part of a new bridge girder construction position, and the new bridge girder 3 is lowered and constructed at the construction position. The existing bridge girder 2 is laterally moved by the lateral take-out rail and the self-propelling bogie, is arranged on the new bridge girder 3, is longitudinally moved in the direction of bridge axis on the new bridge girder 3 by the self-propelling bogie 10, and is removed and carried out into the work yard. Consequently, the construction work for replacing the bridge girder becomes possible even when the conditions exist such as preventing installation of a work structural base for lateral take-out to be installed in a side part of a newly installed bridge girder in a conventional construction method and the restriction of using a space below the bridge girder. COPYRIGHT: (C)2009,JPO&INPIT
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