流溪河大桥主桥重建方案设计研究  

Design and Research of Reconstruction Scheme of Main Bridge of Liuxi River Bridge

作　　者：刘杰 LIU Jie

机构地区：[1]广州市市政工程设计研究总院有限公司,广东广州510060

出　　处：《城市道桥与防洪》2024年第10期79-82,M0009,M0010,共6页Urban Roads Bridges & Flood Control

摘　　要：流溪河大桥位于广州市温泉旅游度假区,在桥梁建设过程中因规划条件发生变化,桥梁由立交形式跨越堤岸路变更为与堤岸路平交,建设中的主桥需要拆除重建或易地建设。为了最大限度地利用原有桥梁结构,降低工程造价,同时满足周边景区对桥梁景观的要求,设计时结合已建条件,对不同重建方案进行了比较研究。经比选,最终确定主桥采用单跨125 m下承式钢筋混凝土系杆拱桥。主桥由系梁、拱肋、吊杆等组成,采用先梁后拱法施工。其中,拱肋采用钢筋混凝土结构,拱轴线为2次抛物线,矢跨比为1/5;系梁按整体箱形断面布置,采用单箱3室预应力混凝土箱形截面。流溪河大桥重建方案的设计思路和方法,可为今后同类型旧桥改造设计等提供参考。Liuxihe Bridge is located in Guangzhou Hot Spring Tourism Resort.In the process of bridge construction,the bridge has changed from overpass across the embankment road to at-grade with the embankment road because of the changed planning conditions.The main bridge in the construction is required to demolish and rebuilt or construct in another place.In order to utilize the original bridge structure to the utmost extent,to reduce the engineering cost,and also to meet the requirements of surrounding scenic area for the bridge landscape,and combined with the built conditions during the design,the different rebuilding schemes are compared and studied.After comparison and selection,it is finally to determine that the main bridge is a single-span 125 m through reinforced concrete bowstring arch bridge.The main bridge is composed of collar beam,arch rib and boom,which is constructed by the method of beam first and then arch.Its arch ribs are the reinforced concrete structures.The arch axis is a quadratic parabola,and the vector span ratio is 1/5.The collar beam is arranged according to the overall box section,and the single-box three-compartment prestressed concrete box section is adopted.The design ideas and methods in the rebuilding scheme of Liuxi River Bridge can be referred for the reconstruction and design of the similar old bridges in the future.

关 键 词：系杆拱桥 自锚式悬索桥 钢-混组合结构 旧桥基础利用 拆除重建 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]