广州海心桥主桥设计  

Design of Main Bridge of Haixin Bridge in Guangzhou

作　　者：杨勇 胡会勇 乐小刚 周昱 YANG Yong;HU Huiyong;YUE Xiaogang;ZHOU Yu(Guangzhou Municipal Engineering Design&Research Institute Co.,Ltd.,Guangzhou 510060,China)

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：《桥梁建设》2023年第6期119-126,共8页Bridge Construction

基　　金：广东省自然科学基金项目(2022A1515011703)。

摘　　要：广州海心桥是跨越珠江的人行景观桥,整体造型采用“琴鸣绢舞,岭南花舟”的概念,主桥采用拱跨198.152 m的曲梁斜拱中承式钢拱桥,拱梁固结。该桥共设置2条步道,二者在边跨部分平面呈分叉分幅布置,中跨合并成整幅,标准桥宽15 m。拱肋采用二次抛物线的形式并向东倾斜10°,矢高57.95 m,矢跨比1/3.4,采用等高变宽圆端形箱形断面,拱肋桥面以下至拱脚范围采用超高性能混凝土(UHPC)包裹钢箱混凝土组合结构。主梁平面为半径129.1 m向东侧弯曲的曲线梁,中跨为单箱三室横向变高的钢箱梁,边跨为分幅单箱单室钢箱梁。吊杆采用GJ15-19挤压锚固钢绞线拉索,向心布置,共23根。拱肋插入水中拱座,下接20 m×20 m承台,并与其下的9根∅3 m型钢混凝土抗推桩共同抵抗水平推力。经计算,结构变形、刚度、人行舒适性及抗风、抗震、防撞性能均满足要求。该桥采用大节段整体吊装的快速化施工技术。The Haixin Bridge,a footbridge over Zhujiang River in Guangzhou,is designed echoing the cultural elements of"Guqin(zither),silk dance and Lingnan show boat"in the Guangdong Province.The main bridge is a half-through steel arch bridge spanning 198.152 m and featuring its curved deck and skew arch.The footbridge carries two walkways that resemble a fork in each side span and merge to be an integral deck in the central span,with a typical deck width of 15 m.Consisting of round-ended steel boxes with constant depth and variable width,the parabolic arch rises 57.95 m and inclines 10°eastward,creating a rise-to-span ratio of 1/3.4.The sections of the arch counting from the arch springing to the deck are composed of UHPC-encased steel boxes.The deck also curves eastward,stretching along a plan curvature radius of 129.1 m.The central span consists of three-cell steel box girders with variable depths,while the side spans are comprised of split single-cell steel box girders.Radially arranged,the 23 hangers are made of GJ15-19 steel strands,with extrusion type anchorage.The arch is inserted into the skewbacks in the river,which are in turn supported on pile caps measuring 20 m by 20 m,and together with the nine reinforced concrete piles of 3 m diameter to resist the horizontal thrust of the arch.The calculations indicate that the deformation,stiffness walking comfort,wind resistance,seismic performance and collision resistance of the structure all reach the required level.The bridge is a typical precast segmental structure.

关 键 词：中承式拱桥 人行桥 曲梁斜拱 UHPC包裹钢箱混凝土组合结构 型钢混凝土抗推桩 施工方案 桥梁设计 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U448.11[交通运输工程—道路与铁道工程] U442.5