超高桥墩上现浇连续箱梁的悬臂托架及挂篮预压施工技术

When constructing the continuous box girder on the high columns,use lifting jack and reaction frame for pre-pressing cantilever bracket and basket technology

在桥梁高墩上施工现浇连续箱梁,为保证施工安全及消除变形,控制挠度值,需要对托架和挂篮进行预压,采用在墩身内预埋精轧螺纹钢筋,在托架上安装贝雷片(分配梁及加强横梁)作为反力架,千斤顶进行预压的施工方法与传统堆载预压法相比,具有安全、便捷、经济效益显著等重大优势。文章详细介绍了该施工技术的工艺原理、工艺流程及操作特点和预压设计与计算。

When constructing the continuous box girder on the high column, We embedded rebar in the pier body, install bailey tablets as reaction frame, use lifting jack for pre - pressing cantilever bracket and basket for eliminating deformation and ensuring safety. The technology is more safety and convenient than the traditional preloading method.