| 摘要 |
PROBLEM TO BE SOLVED: To hardly cause a fatigue crack in concrete, while reducing manufacturing costs. SOLUTION: The bridge 100 includes a composite floor slab 200 which comprises a floor steel plate 10 and concrete. A vertical rib 11 extending in a bridge-axis direction L and a horizontal rib 12 extending in a direction W orthogonal to the bridge axis are on the top of the floor steel plate 10 for reinforcement. The horizontal rib 12 is coupled to timbering 20 via a connecting member 30. The floor steel plate 10 is supported by the timbering 20 via the connecting member 30 and the horizontal rib 12 when placing the concrete. In placing the concrete, the timbering 20 retain a shape of the floor steel plate 10 via the connecting member 30 and the horizontal rib 12. After the hardening of the concrete, the timbering 20 is detached from the connecting member 30 and removed. This dispenses with a reinforcing steel material for shape retention, which supports the weight of the concrete. COPYRIGHT: (C)2011,JPO&INPIT |
