反力预压在大跨度连续梁0#块托架中的应用  

Application of Counterforce Preloading in Long-span Continuous Beam 0# Block Bracket

作　　者：胡春广 

机构地区：[1]中铁十六局集团第二工程有限公司,天津市300162

出　　处：《城市道桥与防洪》2018年第5期214-217,共4页Urban Roads Bridges & Flood Control

摘　　要：研究了采用钢绞线对新建石济客专衡景特大桥跨大广高速公路连续箱梁0#块托架反力张拉预压技术,阐述了支架搭设、测量点布、反压构架的安装等各施工工序操作要点,为连续梁托架施工提供了一项新的预压施工方法。施工实践表明,采用反力预压托架技术可以显著缩短工期降低施工成本。The article studies the counterforce tension preloading technology of the continuous box beam 0# block bracket for the newly built Hengjing Bridge of Shijiazhuang-Jinan Passenger Railway spanning Daqing-Guangzhou Expressway by the steel strands, and sets forth various construction procedure operating points for the erection of bracket, layout of measuring points and installation of counterforce preloading frame in order to provide a new preloading construction method of continuous beam bracket. The construction practice shows that the use of counterforce preloading bracket technology can obviously shorten the construction period and reduce the construction cost.

关 键 词：反力预压 钢铰线预埋 卸载分级 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]