横琴口岸莲花大桥小半径曲线桥钢箱梁顶推施工  

Steel Box Girder Jacking Construction of Hengqin Port Lotus Bridge Small Radius Curve Bridge

作　　者：魏小强[1] 楚兴华 陈之[1] 孙壮 李士聪 WEI Xiao-qiang;CHU Xing-hua;CHEN Zhi;SUN Zhuang;LI Shi-cong(China Construction Second Engineering Bureau Co.Ltd.,South China Branch,Zhuhai 519000,China;Dahengqin Co.Ltd.,Zhuhai519060,China)

机构地区：[1]中国建筑第二工程局有限公司华南分公司,广东珠海519000 [2]大横琴股份有限公司,广东珠海519060

出　　处：《工程建设与设计》2023年第19期148-150,共3页Construction & Design for Engineering

摘　　要：针对桥梁施工时跨越桥梁、道路的难题,分析现场施工条件不便,钢箱梁与板结构、改造工程存在上下立体交叉作业,无法正常施工的现状,创造性地提出“差速顶推”施工工艺,保证箱梁内外侧运动角速度相同,线速度不同。通过控制内外侧线速度的比例,使钢箱梁按设计线路移动,完美解决了施工时跨越桥梁、道路的难题。In view of the difficulties in crossing bridges and roads during construction, it is analyzed that the on-site construction conditions are inconvenient. The steel box girder and slab structure, and the reconstruction project have vertical cross operation from top to bottom, which makes normal construction impossible. The “differential jacking”construction process is creatively proposed to ensure that the internal and external motion angular speeds of the box girder are the same and the linear speeds are different. By controlling the speed ratio of internal and external lines,the steel box girder can move according to the designed line, which perfectlysolves the problem ofcrossing bridges and roads during construction.

关 键 词：桥梁施工 小曲率 临时结构 差速顶推 施工工艺 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]