悬索桥混凝土加劲梁超长预应力体系施工技术  

Construction Technology of Super Long Prestressed System for Concrete Stiffening Beam of Suspension Bridge

作　　者：魏钢 WEI Gang(No􀆰5 Engineering Co.,Ltd.of CCCC Fourth Highway Engineering Co.,Ltd.,Xi’an,Shaanxi710000,China)

机构地区：[1]中交四公局第五工程有限公司,陕西西安710000

出　　处：《施工技术》2021年第11期78-81,共4页Construction Technology

摘　　要：悬索桥混凝土加劲梁采用双向预应力体系,虽然预应力施工技术已应用广泛,但超长预应力体系的张拉、压浆技术尚不完全成熟。以永善县月亮湾大桥主跨悬索桥混凝土加劲梁超长预应力体系施工为背景,采用“桥面放束及自动编束、桥头转向穿束、累进倒顶智能张拉、真空辅助压浆”的施工技术,保证超长预应力体系张拉、压浆质量,延长结构寿命,降低了施工安全风险,实现悬索桥混凝土加劲梁超长预应力体系的高效施工和高精度质量控制。The concrete stiffening beam of suspension bridge adopts two-way prestressed system. Although the prestressed construction technology is widely used, the tension and grouting technology of super long prestressed system is not fully mature. Based on the construction of super long prestressed system of concrete stiffening beam of main span suspension bridge of Yongshan Yueliangwan Bridge, the construction technology of “bridge deck stringing and automatic stringing, bridge head turning and stringing, progressive topping intelligent tensioning and vacuum assisted grouting” is adopted to ensure the quality of super long prestressed system, prolong the service life of structure and reduce the construction safety risk, realize the high-efficiency construction and high-precision quality control of super long prestressed system of concrete stiffening beam of suspension bridge.

关 键 词：桥梁工程 悬索桥 混凝土加劲梁 超长预应力体系 张拉 压浆 施工技术 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]