大跨径外倾式钢箱拱桥施工阶段关键控制技术研究  

Research on Key Control Technology of Large-span Outward Inclined Steel Box Arch Bridge in Construction Stage

作　　者：关清杰 GUAN Qing-jie(China Northeast General Municipal Engineering Design and Research Institute,Changchun 130021,China)

机构地区：[1]中国市政工程东北设计研究总院,长春市130021

出　　处：《公路》2020年第11期167-172,共6页Highway

摘　　要：结合南宁大桥施工,采用拱肋节段缆索吊装、斜拉扣挂悬臂拼装、先拱后梁、以拱承梁的施工工法,重点研究了外倾式拱肋空间姿态调整过程控制要点以及可移动式吊具设计、利用临时索体系维持施工过程中外倾式拱肋稳定的技术、通过临时系杆分阶段张拉平衡施工过程拱脚水平力的方法、拱肋合龙体系转换前线形调整方法等几项关键技术,供同类桥梁参考借鉴。In this paper,the construction method of arch rib segment cable hoisting,cantilever assembly with diagonal buckle,constructing arch first and then beam,as well as arch supporting beam is used in the construction of Nanning Bridge.The key technologies of the adjustment control points for outward rib spatial configuration,design of movable suspender,maintaining the stability of outward rib by means of temporary cable system,the tensioning and balancing the arch feet horizontal force by means of temporary tie rod by phases,as well as adjustment method of geometry before conversion of arch rib closure system are studied which can provide reference for similar bridges.

关 键 词：外倾式钢箱拱 施工阶段 缆索吊装 空间姿态 合龙 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]