新型临时张拉体系在短线匹配悬臂拼装桥梁中的应用  

Application of Novel Temporary Tension System in Short-Line Matching Cantilever Assembly Bridge

作　　者：于淼 邹晖 

机构地区：[1]中交二航局第二工程有限公司,重庆401121

出　　处：《公路交通技术》2017年第3期62-64,共3页Technology of Highway and Transport

摘　　要：短线匹配预制[1]、悬臂安装工艺[2]中采用临时张拉体系,传统方法是预留孔洞后,采用钢齿坎反锚并用精轧螺纹钢张拉。但该方法存在施工困难、安全风险大、功效低、修补后易渗水等缺陷。介绍一种新型临时对拉系统——剪力锥临时张拉体系,其已在港珠澳大桥香港接线工程短线匹配预制箱梁施工中得到成功应用。When adopting temporary tension system in s h o r t - l in e matching p re fabrication , cant ileverassembly process , the tra d it io n a l way is adopting steel bucket back anchorage and tension w ith rol ledthread after holes foreseen. However this measure has the disadvantages of d i f f ic u l t con s tru c t io n,highsafety risk , low effect and easy seepage after re p a ir, etc. This paper introduced a novel temporary p u l lsystem-shearing force temporary tension system. I t was successfully appl ied in Hong Kong-Z h u h a i-M a c a uBridge Hong Kong side connection project s h o r t - l in e matching prefabricated box girder construct ion.

关 键 词：剪力锥 临时预应力 短线匹配悬臂安装 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]