山区大件运输公路常规桥梁设计研究

山区公路地形地质条件复杂，桥梁建设难度大，遇大件运输荷载时，对承载能力要求高。针对其设计特点，以金沙江上游某大型水电站进厂公路桥梁设计为例，介绍了设计荷载及上、下部结构型式选择等需设计者着重考虑的问题。阐述了满足大件运输桥梁跨径承受荷载的控制要求，推荐采用的荷载验算等级，以及桥梁上部构件中梁的优选方案。

Influence of huge parts transportation load on design of bridge in mountain area

As the terrain of mountain area is complex,the construction of bridge in mountain area is usually difficult and there is high requirement for bridge bearing capacity when transporting huge parts.Taking the design of the highway bridge entering a large-scale hydropower station on Jinsha River as an example,we discuss the key issues of design load and selection of upper structure type,which are worthy to be considered in the design process.The requirements of the span of the bridge that can undertake the tran...