基于北斗监测系统的智能调节索在多跨拱桥不对称扣挂体系中的应用  

Application of Intelligent Regulation Cable based on Beidou Monitoring System in Multi-span Arch Bridge Asymmetric Buckle System

作　　者：刘苗 周陈 陈川 王海海 程旭钊 LIU Miao;ZHOU Chen;CHEN Chuan;WANG Hai-hai;CHENG Xu-zhao(CCCC-SHEC Second Highway Engineering Co.Ltd.,Xi’an 710119,China)

机构地区：[1]中交二公局第二工程有限公司,西安市710065

出　　处：《公路》2024年第1期116-123,共8页Highway

摘　　要：双跨连续拱桥的特点在于中央拱座受力的连拱效应,成桥后中央拱座因两侧产生的水平推力方向相反、大小相同而平衡,中央拱座只受竖向压力。但在拱肋吊装过程中,由于缆索吊单次只能吊装一个拱肋节段,单侧拱肋节段吊装完成后会对中央拱座的墩身及扣塔产生较大的不平衡力,从而引起塔偏。以渝湘高速公路复线项目双堡特大桥为依托,主要阐述基于北斗监测系统的智能调节索在双跨连续拱桥中间墩的不对称扣挂体系中的应用,重点说明智能调节索的结构设计和工作运用原理,旨在为今后同类型桥梁施工提供经验借鉴。The double-span continuous arch bridge is featured with the continuous arch effect of the central arch force,and the central arch is balanced due to the opposite direction and the same size of the horizontal thrust generated on both sides after the bridge is formed,and the central arch is only subjected to vertical pressure.However,in the process of arch rib hoisting,because the cable crane can only lift one arch rib segment at a time,the completion of the single-side arch rib section lifting will produce a large unbalanced force on the pier body and buckle tower of the central arch,thus causing tower deviation.Relying on the Shuangbao Major Bridge of the Yu-Xiang(Chongqing-Hunan)Expressway Double Track Project,the application of intelligent regulating cable is introduced based on Beidou monitoring system in the asymmetric buckle system of the middle pier of double-span continuous arch bridge,focusing on the structural design and working application principle of intelligent regulating cable,so as to provide experience for future construction of the same bridge type.

关 键 词：双堡特大桥 双跨连续拱桥 不对称扣挂体系 智能调节索 结构设计 运用原理 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U445.38[交通运输工程—道路与铁道工程]