空间自锚式斜拉—悬索协作体系桥梁上部结构施工关键技术

Key Construction Technology of the Superstructure for a Spatial Self-anchored Cable-stayed and Suspension Bridge

结合东苕溪大桥的总体布置、结构特点和现场条件,对跨中合龙和近塔端合龙的两种总体施工方案进行了对比分析,并分别对主缆空间线形形成、主梁安装及合龙、吊索安装及张拉等关键工艺和技术进行比选和介绍。实践表明,总体及分项施工方案能有效降低安全质量风险,并具有较好的经济性。

Combined with the general layout, structural characteristics and site conditions of the East Tiaoxi River Bridge, the two general construction schemes of closure at middle span and closure near the the tower were compared, and the key process and technology for the spatial main cable shape formation, the installation of main girder and closure, the installation of hangers and pulling were compared, selected and introduced. Practice shows that the overall and subentry construction scheme can effectively reduce the risk of safety and quality, and has a good economic benefit.