摘要
基于高精度几何线形控制和大型机械化集成装备系统施工的节段预制桥梁悬拼技术,已广泛用于国内外桥梁施工。根据厄瓜多尔国家联合大桥(巴巴奥约河大桥)75 m跨径连续梁桥的工程特点,采用有限元法计算全桥预拱度,采用GeomPro软件控制与调整几何线形,介绍JP75架桥机、水上龙门吊、悬臂支架锁定、长束张拉、强制合龙及体系转换等关键设备与施工技术的研究与应用。
The technique for cantilever erection based on control of precision geometry profile and construction with mechanization and integrated equipment system has been widely applied in precast segmental bridge construction.In this paper,according to the characteristics of the continuous structure of span 75m of National United Bridge（Babahoyo River Bridge） in Ecuador,the camber of segment is computed by Finite Element Method and the precision of geometry profile is controlled and correct by using GeomPro software.The study and application of the key equipments and technology for cantilever erection construction such as overhead launching gantry-JP75,gantry crane on river,cantilever temporary fixity,tensioning of long prestressed tendon,mandatory closure and system conversion,etc are presented.
出处
《公路工程》
北大核心
2012年第3期51-56,共6页
Highway Engineering
基金
广西壮族自治区交通科技项目计划(20099520)
关键词
预应力连续梁
上行式架桥机
悬拼技术
结构体系转换
预拱度
几何线形控制
Prestressed continuing box-girder
Overhead launching gantry
Cantilever erection method
Structural system conversion
Camber
Geometry and profile control
作者简介
凌忠（1970-），男，湖南长沙人，高级工程师，主要从事公路桥梁建设与管理工作
