曾家岩大桥刚性悬索架设及合龙施工技术  

Installation and Closure Construction Technology of Rigid Suspension Cable of Zengjiayan Bridge

作　　者：刘小勇 姚笛 枚龙 刘茂娜 LIU Xiaoyong;YAO Di;MEI Long;LIU Maona(China Communication 2nd Navigation Bureau 2nd Engineering Co.,Ltd.,Chongqing 401121,China)

机构地区：[1]中交二航局第二工程公司,重庆401121

出　　处：《施工技术》2021年第7期124-127,共4页Construction Technology

摘　　要：重庆曾家岩大桥为三跨连续刚性悬索加劲钢桁架梁桥,造型独特、结构新颖。刚性悬索的安装时机、工艺及合龙方式对钢梁悬臂安装影响较大。为尽快发挥加劲弦的作用,针对加劲弦的安装,提出了一种非常规的安装施工方法,并就加劲弦的合龙口安装,采用了边界影响因素追溯法对其进行了敏感性分析,提出了合龙口的调位措施,保证了加劲弦安装线形及合龙口的误差,取得了良好的效果。Chongqing Zengjiayan bridge is a three span continuous rigid suspension stiffened steel truss girder bridge with unique shape and novel structure.The installation timing,technology and closure method of rigid suspension cable have great influence on the cantilever installation of steel beam.In order to make the stiffening chord to play its role as soon as possible,an unconventional installation method is proposed for the installation of stiffening chord.In addition,the boundary influence factor tracing method is used to analyze the sensitivity of closure installation of stiffening chord,and the position adjustment measures of closure are proposed to ensure the alignment of stiffening chord and the error of closure opening,and good results are achieved.

关 键 词：桥梁工程 钢桁梁 加劲弦 刚性吊杆 安装 施工技术 

分 类 号：U448􀆰[建筑科学—桥梁与隧道工程]