摘要
泉州湾跨海大桥主桥组合梁采用整体节段安装、节段间桥面板胶拼等全新施工工艺,国内尚无实施先例。考虑到钢梁制造误差、组合梁总拼误差以及安装阶段局部变形等不利因素,整体节段匹配连接将是技术难题,为此开展组合梁整体节段悬臂拼装足尺模型试验。试验确定了整体节段桥面板剪力键及钢套管对位优先、钢箱梁顶板栓接次之、环焊最后匹配连接的原则,测试结果表明已成梁段与被吊梁段匹配口相对变形最大为2.5mm,较之理论计算值偏小。
A lot of new construction techniques have been used in the composite girder of Quanzhou Bay Sea-crossing Bridge, such as installation of integrated segment, deck-splicing by glue etc,which is the first example in China. Considering some unfavorable factors such as the girder manufacturing error, composite assembly error, and local deformation during cantilever installation, matching and linking together of the integral segment will be the biggest technical problem, based on which the full-scale model test is conducted. Through tests the principle of the matching connection is determined which is the alignment of shear keys and steel casing in concrete deck firstly, then the bolt connection, and girth welding finally. The maximum relative deformation of two segment （the hanging segment and completed segment） splices during cantilever installation is 2.5mm, which is smaller than the theoretical value.
出处
《公路》
北大核心
2014年第10期134-138,共5页
Highway
基金
福建省交通运输科技发展项目资助
闽交科教[2012]14号
关键词
组合梁
整体节段
悬臂拼装
胶接缝
模型试验
composite girder
integrated segment
cantilever installation
epoxy joint
model test
