京沪高铁简支系杆拱创新设计与发展  

Innovative Design and Development of Simply-supported Tied Arch of Beijing-Shanghai HSR

作　　者：吴孟畅 文望青[1] 许三平[1,2] WU Mengchang;WEN Wangqing;XU Sanping(China Railway Construction Bridge Design and Research Branch,China Railway SIYUAN Survey and Design Group Co Ltd,Wuhan Hubei 430063,China;Bridge Engineering Laboratory of China Railway Construction Corporation Limited,China Railway SIYUAN Survey and Design Group Co Ltd,Wuhan Hubei 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司中铁建大桥设计研究院,湖北武汉430063 [2]中铁第四勘察设计院集团有限公司中国铁建股份有限公司桥梁工程实验室,湖北武汉430063

出　　处：《中国铁路》2022年第2期56-63,共8页China Railway

摘　　要：简支系杆拱是一种结构受力明确、刚度大、高度低,且美观、经济的无推力拱桥。在京沪高铁徐沪段,简支系杆拱首次被系统研究和广泛运用。该路线共设跨度96 m、112 m和128 m的简支系杆拱桥21处。简支系杆拱的结构为外部静定、内部超静定的尼尔森体系平行拱或提篮拱;系梁采用单箱三室等高预应力混凝土箱梁;拱肋采用哑铃型钢管混凝土截面;吊杆采用PES(FD)低应力防腐索体。通过对吊杆布置形式、矢跨比和拱轴线线形等关键技术参数进行对比研究,确定了合理的结构形式。对简支系杆拱结构的优化进行了总结,并对桥梁结构的发展进行了展望。Simply-supported tied arch is a zero-thrust arch bridge with clear structural force,large stiffness,low height,beautiful appearance and economic efficiency.In Xuzhou-Shanghai section of Beijing-Shanghai HSR,the simply-supported tied arch is systematically studied and widely applied for the first time.A total of 21 simply-supported tied arch bridges with the span of 96 m,112 m and 128 m are constructed for the route.The simply-supported tied arch is an external static and internal super-static parallel arch or basket arch of Nielsen system in structure;single-box three-chamber equal-height prestressed concrete box girder is adopted for the tie beam;dumbbell steel pipe concrete section is adopted for the arch rib;PES(FD)low-stress anti-corrosion cable body is adopted for the suspender.The reasonable structural form is determined by comparative study on key technical parameters such as the layout form of suspender,vector-span ratio and arch axis alignment.This paper summarizes the optimization of simply-supported tied arch structure and looks forward the development of bridge structure.

关 键 词：京沪高铁 简支系杆拱 系梁 拱肋 吊杆 拱脚 横撑 关键技术参数 

分 类 号：U443[建筑科学—桥梁与隧道工程]