嘉绍大桥主航道桥最优合龙顺序研究  

Research on optimal closure order of the main channel girder of Jiashao bridge

作　　者：贾少敏[1] 赵雷[1] 张育智[1] 顾乡[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《四川建筑科学研究》2014年第6期312-315,325,共5页Sichuan Building Science

基　　金：交通运输部科技项目(2010-353-333-130)

摘　　要：嘉绍大桥主航道桥是世界上首座六塔、双幅、空间四索面斜拉桥,其有7个合龙口,合龙方案复杂。通过建立采用不同合龙顺序的有限元模型,比较各种合龙顺序下,合龙时所需压重,斜拉索临时调索量;施工过程及成桥时主梁应力、塔偏、索塔应力、斜拉索应力及各种合龙顺序对施工进度、施工安全性的影响,确定最优合龙顺序。The main channel girder of Jiashao bridge is the world＇s first six-towers,double decks,space four cable plane cable- stayed bridge,there are seven final closures and the closure plan is complex. Through the establishments of six different closure order finite element models,by comparing weight required on different closure orders,the number of temporary adjustment cable,girder stress,tower displacement along the bridge,tower stress,cable stress and influence on construction progress and security,the optimal order closure is determined ultimately.

关 键 词：嘉绍大桥 多塔斜拉桥 合龙顺序 方案比选 几何控制法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]