横向骑跨既有地道曲线宽幅梁拱组合体系桥梁设计与分析  

Design&Analysis of Curved Wide Beam Arch Composite Bridge Crossing Existing Tunnel

作　　者：刘印华 LIU Yin-hua(Shenzhen Qianhai Construction Investment Holding Group Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]深圳市前海建设投资控股集团有限公司,深圳518000

出　　处：《中国市政工程》2024年第5期6-11,155,156,共8页China Municipal Engineering

摘　　要：文章以广东省深圳市前海合作区临海桂湾河桥为背景,对异形梁拱组合体系桥梁的设计特点与施工方法进行介绍。桂湾河桥桥位处地形复杂,桩基布置需避开地下通道等构筑物,设计方案最终确定为86.84 m+124.65 m下承式梁拱组合体系桥,并采用骑跨式转换梁跨越地下通道,主梁、拱肋及转换梁构成整体,共同参与结构受力。桥梁平面位于曲线段;主梁采用封闭的正交异形钢箱梁,桥宽56.2 m~57.8 m,桥面宽度较大,按使用功能横向分为四幅桥设计,结构受力复杂;拱肋由大拱和小拱组成,拱肋之间无风撑连接;吊索采用高强钢丝高钒密封索,结构紧凑,性能稳定,在国内首次应用到大跨径桥梁中。采用有限元分析方法,验证了设计的合理性与施工方法的可行性,可为类似桥梁设计与施工提供借鉴。Taking the Linhai Guiwan River Bridge in Qianhai Cooperation Zone in Shenzhen,Guangdong as the background,it introduces the design characteristics&construction methods of the special-shaped beam arch composite system bridge.The Guiwan River Bridge site is located in a complex terrain,and the pile foundation layout needs to avoid the underground passage&other structures.The design scheme is finally determined as a 86.84 m+124.65 m through beam arch composite system bridge,and a straddle transfer beam is used to span the underground passage.The main beam,arch rib and transfer beam form a whole,and participate in the structural stress.The bridge plane is located in the curve section.The main girder is a closed orthogonal specialshaped steel box girder,with a bridge width of 56.2 m~57.8 m,and a large bridge deck width.It is divided into four bridge designs according to the use function,and the structure is complex in stress.The arch rib is composed of a large arch and a small arch,and there is no wind bracing connection between the arch ribs.The sling adopts high-strength steel wire and high vanadium sealed cable,which has compact structure and stable performance,and is applied to long-span bridges for the first time in China.Using the finite element analysis method,the rationality of the design and the feasibility of the construction method are verified,which can provide reference for the design and construction of similar bridges.

关 键 词：曲线桥梁 梁拱组合体系 钢箱拱 无风撑 转换梁 高钒密封索 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]