| 摘要 |
PROBLEM TO BE SOLVED: To provide a construction method for replacing a bridge girder capable of safely, quickly, securely and inexpensively replacing bridge in replacing a road bridge and 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, is carried onto the existing bridge girder 2, and is supported by a temporarily receiving member 11 composed of a temporarily receiving saddle and the hydraulic jack, the existing bridge girder 2 is lowered onto a transportation bogie 16 by a suspending and lowering device 12 while the existing bridge girder 2 is suspended and supported by the suspending and lowering device 12 installed on the new bridge girder 3 to remove it, and the new bridge girder 3 is lowered and constructed at a construction position. Consequently, the construction work for changing the existing bridge girder becomes possible even when the conditions such as preventing installing a work structural base for lateral take-out and restriction of using a space below the bridge girder exist. COPYRIGHT: (C)2009,JPO&INPIT
|
