52
DOI:10.7672/sgis2015090052
施工技术
CONSTRUCTIONTECHNOLOGY
2015年5月上第44卷
第9期
波形钢腹板预应力混凝土连续箱梁施工技术
楼亚东，梁朝安，欧阳平文，余烽（中天建设集团有限公司，浙江杭州310008）
【摘要】随着大跨度桥梁技术的不断发展，波形钢腹板预应力混凝土连续箱架广泛应用于法国、日本等发达国家，日本现已建成100多座波形钢腹板桥。该结构桥具有跨度大、质量小、造型美观等特点，常用于跨径较大的河道、道路桥渠结构设计，但我国采用该技术建造的桥梁并不多见。通过工程实例介绍了预应力混土连续箱梁的波形钢腹板加工制作、起吊安装、节段连接及箱梁钢筋绑扎、合龙段后带施工、体外索安装等主要施工工艺，并提出了质量控制要求。
【关键词】预应力；桥架工程；波形钢腹板；临时支撑；合龙段；施工技术
【中图分类号】TU757
【文献标识码】A
【文章编号】1002-8498（2015)09-0052-04
ConstructionTechnologyof Corrugated Steel Webs of Prestressed
Concrete ContinuousBoxGirder
LouYadong，LiangChaoan，OuyangPingwen，YuFeng(Zhongtian Construction Group Co., Ld.,Hangzhou, Zhejiang 310008, China)
Abstract: With the continuous development of the long-span bridge construction technology, corrugated steel webs of prestressed concrete continuous box girder is widely used in developed countries like France and Japan. Japan has built more than 100 bridges with corrugated steel webs so far. This kind of bridge has many advantages, such as large span, light weight and attractive appearance, and it is often applied for the design of long-span roads and bridges. However, the number of this kind of bridge is comparatively small in China. Through the engineering example, this paper briefly introduces the main construction technologies of the corrugated steel webs of the prestressed concrete continuous box girder, such as processing, lifting and installation, segment connection, box girder rebar colligation, the after-pouring construction of the closure period and the installation of extermal cable , moreover, it puts forward the quality control requirements.
corrugated
steelwebs;temporary
supports;
Keywords:prestressing;bridges; segments; construction
0
引言
波形钢腹板预应力混凝土连续箱梁具有跨度
大、质量小、造型美观等特点，常应用于跨径较大的河道、道路桥梁结构。波形钢腹板预应力混凝土连续箱梁是以波形钢代替传统混凝土梁作为箱梁的腹板受力，其新颖独特的结构形式属于新结构、新技术。
1工程概况
杭州市德胜东路（沪杭高速一文汇路）改造提升工程江干段02标，西起九环路东侧，东至久福路【作者简介】楼亚东，高级工程师，E-mail；21953198@qq.com
【收稿日期】2014-03-07 万方数据
closure
西侧，全长1.69km，位于现状德胜东路上，呈东西走向，全线为高架桥，双向6车道，标准桥宽25m，标准跨径30m。本工程跨越杭海路、九盛路均采用三跨一联的波形钢腹板预应力混凝土连续箱梁结构，跨径布置为45m+75m+45m，主梁采用单箱三室截面，混凝土为C50，波形钢腹板采用Q345D钢材，预应力体系采用纵、横双向预应力体系，采用高强度低松弛钢绞线，体外预应力采用无黏结钢绞线，体外束外套采用高密度聚乙烯（HDPE）管。跨杭海路箱梁上部结构波形钢腹板波长1.60m，波高0.22m，水平面板宽0.43m，水平折叠角度为30.70°，跨九盛路段箱梁上部结构设置曲率1500m的半径，钢腹板