低山丘陵区公路中小跨桥梁设计问题探讨

Discussion on the Middle and Small Span Bridges Design of Low Mountain and Hilly Areas

中小跨径桥梁是低山丘陵区公路中桥梁建设的主要桥型,其设计好坏直接影响桥梁的造价、安全与使用。通过对低山丘陵区公路中小跨径桥梁上部结构的比选,得出预应力混凝土箱梁是最佳上部结构方案,详细阐述了墩高对低山丘陵区公路中小跨预应力混凝土箱梁跨径的影响以及中小跨预应力混凝土箱梁的构造要求,为解决低山丘陵区公路中小跨桥梁设计问题提供了技术借鉴。

Small and medium span bridge is the main bridge in hilly area highway bridge,and its design willdirectly affect the cost,safety and use of the bridge. For the upper structure of hilly area middle and small spanbridges,the prestressed concrete box girder is the best structure scheme,and the effect of pier height and structuralrequirements of hilly area middle and small span bridges are expounded,which can provide a technical reference forsolving the problem of hilly area of middle and small span bridge.