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大丰县水利局最近试建成功“装配式三铰双悬臂桁架拱农桥”。这种桥型在跨中及二墩座处设铰。墩座铰设置于正常水位处河坡上,跨中采用焊头简单铰。边跨悬臂直接伸展至河口青坎与道路衔接,桥头只有端座,不设桥台,端座为一弹性支座,上垫2厘米旧轮胎橡皮,当空载或活载作用于中跨时,两端呈悬臂状,以利边跨桁架自重力矩抵消一部分跨中水平力矩。桥面采用预制双悬臂平坦微弯板,直
Dafeng County Water Conservancy Bureau recently successfully built “assembly-type three-hinged double cantilever truss Arch Bridge.” This type of bridge in the span and two plinths at the hinge. Pier seat hinge set at the normal water level at the river slope, the cross head with a simple hinge. Extending across the cantilever directly to the estuary Qingkan convergence with the road, the bridge only the end seat, no abutment, the end seat for a flexible bearing, the pad 2 cm of the old tire rubber, when no-load or live load acting on the mid-span , Both ends of the cantilever shape, in order to facilitate the side of the cross-truss gravity to offset part of the mid-level torque. Deck prefabricated double cantilever flat micro-bending board, straight