广绕高速嘉陵江特大桥总体方案设计  

Overall Scheme Design of Jialing River Grand Bridge in SX Guang′an Ring Expressway

作　　者：黄春华 蒋逢炜 田明 卿江 HUANG Chunhua;JIANG Fengwei;TIAN Ming;QING Jiang(China Highway Engineering Consulting Corporation,Beijing 100089)

机构地区：[1]中国公路工程咨询集团有限公司,北京100089

出　　处：《公路交通技术》2025年第2期47-53,61,共8页Technology of Highway and Transport

摘　　要：广绕高速嘉陵江特大桥是广安绕城高速公路的关键控制性工程,对区域交通发展意义重大。为确保该桥方案经济合理、结构安全可靠、环境协调美观,总体方案设计综合比较了中承式拱桥、下承式拱桥、斜拉桥等多种桥型方案,最终推荐采用主跨344 m中承式钢管混凝土提篮拱桥方案。该方案能一孔跨越嘉陵江,结构受力合理,外形美观大气,造价经济,通航防洪影响小,施工工艺成熟,难度与风险较低;其主拱肋、横撑、桥面系、基础等设计经多因素考量确定,主拱肋采用四肢桁式截面,矢跨比1/4.4,拱轴系数1.5,横撑采用X形横撑,桥面系选用悬吊式纵横格子梁现浇桥面板,基础采用明挖扩大基础。该总体方案设计既可为嘉陵江特大桥建设提供科学依据,又可为类似桥梁设计提供参考。Jialing river grand bridge,as a crucial and controlling project of SX Guang′an Ring Expressway,holds great significance for the regional transportation development.To ensure that the design is economically reasonable,structurally safe and reliable,and in harmony with the environment in terms of aesthetics,the overall scheme design has comprehensively compared various bridge type schemes such as half-through arch bridges,through arch bridges,and cable-stayed bridges.Eventually,the scheme of a half-through concrete-filled steel tubular basket-handle arch bridge with main span of 344 m is recommended.This scheme can span the Jialing River in one span,with rational structural stress,elegant and magnificent appearance,economic cost,minor impact on navigation and flood control,mature construction technology,and relatively low difficulty and risk.The designs of its main arch ribs,cross braces,bridge deck systems,foundations,etc.,have been determined considering multiple factors.The main arch ribs adopt a quadruped truss section with a rise-span ratio of 1/4.4 and an arch axis coefficient of 1.5.The cross braces adopt X-shaped cross braces.The bridge deck system selects the cast-in-place bridge deck slab with suspended longitudinal and transverse lattice girders.The foundation adopts the open-cut spread foundation.The overall scheme design provides a scientific basis for the construction of the Jialing river grand bridge,and can serve as a reference for the design of similar bridges.

关 键 词：嘉陵江特大桥 钢管混凝土拱桥 总体方案设计 桥型方案比选 结构设计 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]