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代县峨河调水工程跨越滹沦河的倒虹桥,为预应力钢筋混凝土桁架组合式桥梁,主桥长220m,单跨20m。预应力钢筋混凝土桁架系上升式斜杆的平行弦杆桁架,单榀重11.7t。桁架设计杆件截面尺寸较小,具有长、薄、轻、巧的特点。桁架采用现场平卧重迭预制,避开了桁架运输,克服了桁架平面刚度较差吊装困难。扶直、绑扎、吊装连续作业,安装一次成功,通水运用良好,阶段验收评为优质工程。
Daixian E River water diversion project across the Hell River inverted Hongqiao, prestressed concrete truss composite bridge, the main bridge length 220m, single span 20m. The prestressed reinforced concrete truss is a parallel chord truss with an upright diagonal bar weighing 11.7t. Truss design rod section smaller size, with long, thin, light, clever features. The truss is prefabricated by lying on the ground, avoiding truss transportation and overcoming the difficulty of hoisting the truss with poor plane rigidity. Straightening, banding, hoisting continuous operation, the installation of a successful, well-water use, phase acceptance as a quality project.