2017年1月下第46卷第2期
D0I:10. 7672/sgjs2017020043
施工技术
CONSTRUCTION TECHNOLOGY
43
泸定大渡河特大悬索桥索塔横梁波形钢腹板施工技术
高勇刚，李龙海，场泽银，高成子，孟祥冲
（中建钢构有限公司，广东深埔518000）
【摘要】波形锡腹板PC组合箱巢已广泛应用于现代桥梁工程中，较之传统PC箱，钢-混爱土组合箱噪具有梁体自重轻、施工周期短、造价低、外观优美等优点。借鉴波形钢腹板PC箱染桥的应用经验，泸定大渡河特大桥工程创新采用钢-混凝土组合结构箱形索塔横架，是国内首次将波形锅腹板用于大跨度悬索桥索塔横梁中。结合本工程施工经验，介绍了索塔横梁中巨型波形钢腹板综合施工技术，包括波形钢腹板的大板压型、钢构件工厂拼焊、焊接
应力消除、现场高空大风环境下的吊装与焊接工艺、波形钢板涂装工艺等。【关键词】桥梁工程；索塔；横梁；波形钢腹板；PC箱梁；制作；施工技术
【中图分类号】TU758.11
【文献标识码］A
【文章编号】1002-8498(2017)02-0043-03
Constructionof the Corrugated SteelWebs UsedinBeamsof Suspension Bridge Cable Bent Tower of Luding Dadu RiverBridge
Gao Yonggang, Li Longhai, Tang Zeyin, Gao Chengzi, Meng Xiangchong
(China Construction Steel Structure Co.,Lid., Shenzhen,Guangdong518000,China)
Abstract : Pre-stressed concrete box-girder with corrugated steel webs have been extensivly applied in the engineering construction of modern bridges. Compared to conventional PC box girder web, steel-concrete aaa appearance. The application of steel-concrete composite box girder of cable tower is brought forth to the Luding Dadu River Bridge Project by using experience of PC box girder footbridge with the corrugated steel webs for reference. Corrugated steel webs are applied in cable tower beam of long-span suspension bridge for the first time in China. This paper introduces the comprehensive construction technologies of cable tower beams with huge corrugated steel webs involving construction experiences, which includes profiled corrugated steel webs, tailor-welding Technology in steel members manufacturing, elimination of welding stress, operation of erection and welding at high position with strong wind, coating technology of corrugated steel webs and so on.
Key words:bridges; cable bent tower;
beams;
manufacture;construction
波形钢腹板PC箱梁已广泛应用于现代桥梁工程中波形钢腹板较传统平腹板可避免腹板在剪力和扭矩作用下的局部变形，从而采用更薄的钢板产生更强的承载力。计算及试验数据表明，采用波形钢腹板比采用传统平腹板可节省钢材20%~50%，而波形钢腹板PC箱梁桥较传统预应力混凝土桥可节省造价10%左右。由于波形钢腹板优秀的承载力表现和经济性，世界各国已在桥梁建设中广泛应用波形钢腹板，日本是应用最多的国家，达130座；
【作者简介】高勇刷，高级工程师，E-mail：453199804@qq.com
【收稿日期］2016-07-29 万方数据
corrugated steel web; PC box girder;
我国在此方面尚属于推广应用阶段，目前有资料可查的仅有24座。
随着钢-混凝土组合桥梁的不断推广和桥梁设计的不断创新，鼓励国内桥梁专家在材料和工艺方面的不断突破与尝试。泸定大渡河特大桥工程，首次在索塔横梁中设计应用波形钢腹板PC组合箱梁，利用其较好的抗剪和抗扭曲能力，代替传统横梁混凝土腹板，以减轻横梁自重，并能有效避免混
凝土腹板开裂等问题。工程概况
泸定大渡河特大桥主桥为1100m单跨悬索桥