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果子沟大桥实施方案为主跨360m双塔双索面钢桁梁斜拉桥,因应用于大跨公路斜拉桥的钢桁加劲梁在国内首次采用,缺乏成功设计经验,故对钢桁梁关键部位结构选型进行研究尤为重要。本文结合大桥具体建设条件,从受力、制造、运输、安装、经济性等多方面对主桁结构类型及关键部位结构选型,如板桁是否组合,桁式、桁高、节间长度、节点、拉索锚固方式等,进行分析、论证、比选,确定了适合本桥的钢桁梁结构形式。
Due to the implementation of Guozigou Bridge, the main span of 360m double-tower double-cable face steel truss cable-stayed bridge is mainly adopted in China due to the lack of successful design experience. Therefore, the steel truss girder It is very important to study the structure selection of the key parts. Based on the concrete construction conditions of the bridge, this paper analyzes the types of the main truss and the selection of the structure of the main parts from the aspects of force, manufacture, transportation, installation and economy, such as whether the truss is composed, the truss, the truss height, the internode length, Node, cable anchoring method, etc., to analyze, demonstrate, compare and select, to determine the structure of the steel truss girder suitable for this bridge.