| 摘要 |
PROBLEM TO BE SOLVED: To provide wooden bridges which have a laminated wood structure of high strength, especially high strength and reliability, and is suited to a natural environment and scenery. SOLUTION: This wooden bridge is provided with a floor slab wherein a lot of long laminated woods 2 abut and closely contact with each other in right and left and fore-aft directions to form juxtaposing in a zigzag, a lot of through holes located on central part of the thickness of the floor slab of the laminated wood in parallel with a floor slab surface and drilled orthogonalizing in a direction of fiber of the laminated wood 2, a prestressed steel bar 4 inserted into the through hole, and an anchorage device used a wood anchorage plate 3 (especially, a laminated wood is desirable) arranged on both ends of the prestressed steel bar 4 inserted. The prestressed wood floor slab wherein prestressing force is introduced into the prestressing steel bar 4 and the floor slab of the laminated wood through the anchorage device is adopted for the floor slab of the wood bridge. A desirable anchorage plate 3 is an anchorage plate fitted like a hoop a ring made of high strength materials into a peripheral edge thereof, or an anchorage plate attached with a cap made of the high strength materials. |
