| 摘要 |
PROBLEM TO BE SOLVED: To achieve rapid construction regardless of the structure of each of the webs constituting a part of a box girder, in a method for constructing a box girder bridge by overhang construction work.SOLUTION: In a state that a movable work vehicle 100 is moved to an upper floor slab 12 constituting a leading block B(n) with an unconstructed lower floor slab 14, construction of webs 16 in a next leading block B(n+1) is carried out. After that, construction of the upper floor slab 12 of the next leading block B(n+1) and the lower floor slab 14 of the leading block B(n) is carried out. At this time, construction of webs 16 in the next leading block B(n+1) is performed by inserting a PC steel 26 through two panel members 22 to constitute the webs 16 and two upper precast ribs 24 to constitute a part of the upper floor slab 12 in the bridge axial direction and applying tension to them, in the state that the panel members 22 and the upper precast ribs 24 are suspended and supported by the movable work vehicle 100 and arranged alternately in the bridge axial direction. |
