鄂东大桥混合梁斜拉桥合龙技术  

Closure technique for the hybrid girder cable-stayed bridge of Edong Bridge

作　　者：刘明虎[1] 谭皓[1] 徐国平[1] 赵灿晖[2] 

机构地区：[1]中交公路规划设计院有限公司,北京100088 [2]西南交通大学土木学院,成都610031

出　　处：《中国工程科学》2011年第10期99-104,共6页Strategic Study of CAE

摘　　要：结合世界第二混合梁斜拉桥——主跨926 m的鄂东大桥,研究了大跨径混合梁斜拉桥中跨合龙方案的影响因素及关键技术,确定采用加载合龙方案。加载合龙方法具有较好的温度适应性,对成桥结构线形和受力影响很小,满足无应力施工控制方法的要求,适用于大跨径混合梁斜拉桥。研究成果及实践经验对同类型桥梁具有借鉴指导意义。Based on Edong Bridge,which is the second longest hybrid girder cable-stayed bridge with 926 m long main span,the influencing factors and crucial techniques of the main span closure method for long span hybrid girder cable-stayed bridge are studied.After theoretical analysis,numerical evaluation and practical test,the loading assistant closure method is employed in Edong Bridge.The loading assistant closure method,with better thermal adaptability and less influence on bridge line and the forced status,can meet the requirements of the unstressed state control method.Based on the mentioned advantages,the loading assistant closure method is applicable to long span hybrid girder cable-stayed bridges.The conclusion can provide reference for the further design of the similar bridges.

关 键 词：鄂东大桥 混合梁斜拉桥 合龙技术 加载合龙 无应力状态控制法 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]