南京大胜关长江大桥主桥钢梁主跨合龙技术  

Closure Techniques for Main Span Steel Girder of Main Bridge in Nanjing Dashengguan Changjiang River Bridge

作　　者：骆双全[1] 

机构地区：[1]中铁大桥局集团第二工程有限公司,江苏南京210015

出　　处：《施工技术》2009年第10期94-96,共3页Construction Technology

摘　　要：京沪高速铁路南京大胜关长江大桥主桥为2联(84+84)m连续钢桁梁+(108+192+336+336+192+108)m六跨连续钢桁拱桥。六跨连续钢桁拱桥分4个合龙点,先192m边跨合龙,再主跨合龙。介绍该桥主桥主跨合龙的特点、技术措施、合龙前的架设状态、合龙步骤。主跨钢梁合龙方法与传统合龙方法相比,取消了钢梁合龙时顶落梁的过程,从而降低了合龙风险,节约了大量的设备费用,同时也解决了通过顶落梁很难将3片主桁空间结构的18个合龙杆件位移同时调整到位的问题。The main bridge of Nanjing Dashengguan Changjiang River Bridge on Beijing-Shanghai High-speed Railway is composed of two units of（84＋84）m continuous steel truss girders and six spans of（108＋192＋336＋336＋192＋108）m continuous steel truss arches.The six-span steel truss arches are closed at four closure points,in which the 192m side spans are closed first,and the main spans are closed later.This paper presents the characteristics,technical measures,erection status before closure as well as the closure steps of the main span steel girder of the bridge.Compared to traditional closure methods,the closure method for main span steel girder avoids the process of girder lifting and falling during steel girder closure,and thus reduces the risk of closure and saves a large amount of equipment costs.It also solves the problem that it is difficult to adjust 18 pieces of closure members of 3 trusses to the design positions at the same time through girder lifting and falling.

关 键 词：钢桥 桁架拱桥 桥梁架设 合龙 施工方法 

分 类 号：U445[建筑科学—桥梁与隧道工程]