| 摘要 |
PURPOSE:To enable easy and positive construction by rehanging the erected bridge girder of a side span part as a simple beam and simplify also the structure of the hanging member so as to provide an inexpensive construction method. CONSTITUTION:A bridge girder 2 in a side span part 1 or a simple beam in a concrete bridge is constructed being divided as plural block girders 3, and each block girder 3 is supported by hanging material 8 from a temporary beam 6 so as to support each block girder 3 always as a simple beam form. Each block girder 3 is then jointed and projected in regular succession by the construction of a mobile erection vehicle 5 to complete the bridge girder 2 in the side span part 1 or the simple beam. With construction thus performed from the side span part 1 or simple beam, the bridge girder 2 under construction is put in the stress generated state close to a completed system so as to be able to utilize PC steel 7 disposed at each block girder 3. Also since each block girder 3 under construction is put in the simple beam state, negative moment is not generated on the upper side, so that a supporting member or the like to moment is omitted. |
