施工技术 2016年10月下 106 CONSTRUCTION TECHNOLOGY 第45卷第20期 D01:10.7672/sgjs2016200106 移动模架超宽鱼腹型现浇箱梁线形控制研究 罗桂军，谢晖2，肖洪波1，彭云涌，谈超 (1.中建五局土木工程有限公司，湖南长沙410004；2.湖南大学土木学院，湖南长沙410012) [摘要]移动模架现浇施工是一种先进的施工工法，具有不受施工环境限制、施工成本低、机械化程度高、施工工期 稳定等优点.但现浇箱梁施工中移动模架主梁变形通常较大，合理设置预拱度及减少新旧混凝土结合面错台是亟 待解决的问题.以武四湖大桥超宽鱼腹型箱梁移动模架现浇施工为背景，对移动模架进行有限元数值分析以及理 论计算，提出弹性变形修正计算公式以及错台控制过程中后浇段长度的计算方法.此外，针对桥梁宽度较大、空间 效应明显的特点，对包括纵桥向和横桥向线形控制在内的空间线形控制技术进行研究，确保线形控制成功实施. [关键词]移动模架；弹性变形；修正；预拱度；错台；线形；控制 [中图分类号]U445.463 [文献标识码]A [文章编号]1002-8498(2016)20-0106-06 Study on Alignment Control of Ultra Wide Fish Bellied Type Cast-in-situ Box Girder of Movable Scaffold Luo Guijun' Xie Hui Xiao Hongbo' Peng Yunyong' Tan Chao' (1.CCFEB Civil Engineering Co.Ld.Changsha Hu'nan 410004 China; 2.Civil Engineering College Hu'nan University Changsha Hu'nan 410012 China) Abstract:Movable scaffold system construction is an advanced construction method.It has advantages of non-limitation of construction environment low construction cost high level of mechanization and stable construction period etc.But the deformation for main girder of movable scaffold system is generally large when pouring concrete.So how to set camber and reduce new and old concrete bined surface split- level is a problem demanded to be solved.Based on ultrawide fish-bellied box girder with movable scaffold system cast-in-situ construction for Wusi Laker Bridge the finite element analysis and theoretical calculation for movable scaffold system are conducted and the elastic defor...
移动模架超宽鱼腹型现浇箱梁线形控制研究.pdf
