港珠澳大桥浅水区非通航孔桥钢-混组合梁施工技术  

Construction Techniques for Steel and Concrete Continuous Composite Girder of Non-Navigable Span Bridge of Hong Kong-Zhuhai-Macao Bridge over Shallow Water Area

作　　者：朴泷 周高明[2] 吴小兵[2] 胡勇[3] 李军平[2] 

机构地区：[1]港珠澳大桥管理局,广东珠海519015 [2]中铁宝桥集团有限公司,陕西宝鸡721006 [3]中铁大桥局集团有限公司,湖北武汉430050

出　　处：《桥梁建设》2016年第2期13-18,共6页Bridge Construction

摘　　要：港珠澳大桥浅水区非通航孔桥采用85m钢-混组合连续梁桥形式,组合梁由混凝土桥面板及钢主梁通过集束式剪力钉连接而成。混凝土桥面板在预制场内一次性浇筑完成;钢主梁整孔制作分为板单元制造、分段制造、总拼3个阶段,总拼后,利用环氧砂浆将钢主梁与混凝土桥面板粘接在一起,由3 000t"天一号"运架一体船整孔运输和架设。在该桥组合梁施工中,采取了以下新技术:钢主梁底板单元纵向对接焊缝采用预设反变形胎架以单面焊双面成型的工艺焊接;横隔板及底板单元整体制造采用自动化焊接机器人焊接;钢主梁总拼时腹板对接焊缝采用轨道式数字化焊接机器人进行立位焊接,腹板与底板熔透焊缝采用无盲区焊接小车焊接。The non-navigable bridge of the Hong Kong-Zhuhai-Macao Bridge over the shallow water area is a 85-m span steel and concrete continuous composite girder bridge.The composite girder of the bridge is comprised of the concrete deck slabs and steel main girder that were connected by the clustered shear studs.The deck slabs were cast in one time in the precasting yard and the main girder was manufactured and assembled in each full span in 3stages of the plate unit manufacturing,segment manufacturing and general assembling.After the general assembling of the main girder was completed,the deck slabs and the girder were bonded,using the epoxy mortar and were transported to and erected at the bridge site in each full span by the 3 000 tTianyi Vessel.In the whole construction of the composite girder of the bridge,the following new techniques were used,i.e.the longitudinal butt joints of the bottom plate units of the main girder were welded,using the preset counter-camber jigs and the workmanship of one-side welding and two-side shaping.For the integral manufacturing of the diaphragm and bottom plate units,the welding was carried out,using the automatic welding robots.At the time of the general assembling of the main girder,the butt joints of the webs of the girder were vertically welded,using the rail-mounted digital welding robots and the penetration joints of the webs and bottom plates were welded,using the blindarea-free welding trolleys.

关 键 词：跨海大桥 连续梁桥 组合梁 钢箱梁 混凝土桥面预制板 板单元组焊 总拼装 桥梁施工 

分 类 号：U448.21[建筑科学—桥梁与隧道工程] U445.47[交通运输工程—道路与铁道工程]