摘要
盘锦辽东湾新区内湖中桥主桥为系杆拱桥与连续梁桥的组合结构,主梁采用连续钢箱梁,主拱为全焊接钢箱拱肋,跨径布置为(31+62+200+62+31)m。拱肋结构由边拱、主拱圈及辅助拱构成。拱肋分节段在厂内加工制作,拱肋节段制作完成后用平板车运至桥位施工现场,在现场支架上进行卧拼后利用临时塔架分别将北侧、南侧半跨拱肋进行竖转提升,提升到位后进行合龙段吊装焊接施工。整个施工过程运用有限元分析软件进行模拟计算,在拱肋竖转提升过程中实时监测提升索拉力、塔架顶部位移及拱肋线形等相关指标,保证钢拱肋线形满足要求。
The main bridge of Inner Lake Center Bridge in the Liaodong Bay New District in Panjin City is a combined tied arch bridge and continuous girder structure, with span arrangement of（31＋62＋200＋62＋31） m.The main girder adopts the continuous steel box girder and the main arch the fully welded steel box arch ribs.The arch ribs, formed of the side arch, main arch ring and auxiliary arch, were first manufactured in the factory in stages, then transported to the construction site by trucks after the completion of fabrication of the arch rib sections.The arch rib sections were laterally assembled on the scaffolds, the half-span arch ribs at both the north and south sides were vertically rotated and lifted by temporary lifting frames.The lifting and welding of the closure section began after the two half-span arch ribs were lifted into position.The whole construction process was modeled and calculated using finite element software.During the vertical rotation and lifting of the arch ribs, the tensioning force of the lifting rope, displacement of the top of the lifting frames and the alignment of the arch ribs must be monitored on real time, so as to ensure that the geometry of the steel arch ribs can meet the requirements.
出处
《世界桥梁》
北大核心
2017年第2期19-23,共5页
World Bridges
关键词
系杆拱桥
连续梁桥
组合体系
钢拱肋
卧拼
竖转提升
合龙
有限元法
tied arch bridge
continuous girder bridge
combined structure
steel arch rib
lateral assembly
vertical rotation and lifting
closure
finite element method
