大胜关长江大桥主拱合龙措施及监控计算分析

研究目的:本文以南京大胜关长江大桥为依托,对三主桁钢桁拱桥的主拱合龙进行监控计算分析,研究钢桁拱桥的施工合龙措施,并以监控计算指导施工架设,使钢桁拱桥在较短时间内顺利实现精确合龙,可为同类型钢桁梁的合龙提供参考。研究结论:大胜关长江大桥为三主桁的六跨连续钢桁拱桥,中间2个主拱跨,两端各2个边跨。其主拱的施工合龙采用中主墩钢梁双悬臂架设、两边主墩单悬臂架设、跨中合龙的总体方案。通过对其三主桁钢桁拱桥施工合龙的监控计算分析及合龙措施研究,采用了长圆孔、圆孔、销子、顶拉装置及温差的合龙措施,双主拱顺利实现精确合龙。

Measures for Closure of Main Arch of Dashengguan Yangtze Rive Bridge and Analyses of Monitoring Computation

Research purposes: Based on the Dashengguan Yangtze Rive Bridge in Nanjing,this paper analyzes the monitoring computation for the closure of the main arch of the steel truss arch bridge with three main steel trusses and studies the closure measures for the purposes of directing erection of the bridge,achieving the accurate closure in short time and providing the references to the similar works.Research conclusions:The Dashengguan Yangtze Rive Bridge is a tri-steel truss and six-span continuous arch bridge w...