摘要
针对洞庭湖铁路斜拉桥的结构特点,提出先箱后桁两步拼装的新方法,并对该法提出2个施工方案并进行有限元模拟和对比分析,定量研究箱、桁由于施工不同步引起的变形不协调问题。根据计算结果推荐方案2,该方案能将箱、桁变形的不协调控制在螺栓与螺栓孔间隙的可调范围内,而且可以在桥面上多点分段拼装主桁杆件以加快施工进度。该方案已被成功应用于该桥的施工并取得了很好的效果。
According to the structure characteristics of Dongting Lake railway cable-stayed bridge, a new method of two-step construction was proposed, in which the box girder was fabricated first and then the steel trusses were installed on the box girder deck. This method not only overcomes the shortages of separate installation, such as too many components and too heavy aerial work on the site, but also overcomes the shortcomings of segment installation such as large size and large weight of the segment, too many splice joints, and difficulties of installation, hoisting and transfer of the segment. Two plans of the new method were presented, and their construction processes were simulated. The nonconforming deformation of the box girder and the truss bars were studied quantitatively using finite element method. According to the results, plan 2 was recommended, which can control the nonconforming deformation of the box girder and the truss bars within the adjustable range of the gap between the bolt and the bolt hole. Furthermore, the installation of the truss bars upon the box girder can be divided into many parts along the length of the bridge. In these parts, the truss bars can be installed at the same time to speed up the construction process. Plan 2 has been recommended and successfully used in the construction of the bridge and obtained excellent results.
引文
[1]易伦雄.三塔双主跨双线铁路斜拉桥竖向刚度问题的研究[D].长沙:中南大学, 2011.YI Lunxiong. Study of vertical stiffness of triple-tower double-main-span railway cable-stayed bridge[D].Changsha:Central South University, 2011.
[2]卢剑.开口箱—桁组合结构铁路斜拉桥桥面系结构的研究[D].长沙:中南大学, 2014.LU Jian. Test study of vertical stiffness of triple-towerdouble-main-span railway cable-stayed bridge[D].Changsha:Central South University, 2014.
[3]许交武.三汊矶湘江大桥主孔钢箱梁安装施工方法[J].铁道科学与工程学报, 2011, 8(3):92-97.XU Jiaowu. The main hole steel box girder construction methods of Sanchaji Xiangjiang River bridge[J]. Journal of Railway Science and Engineering, 2011, 8(3):92-97.
[4]邓永锋,周明星.黄冈公铁两用长江大桥钢桁梁架设技术研究[J].桥梁建设, 2013, 43(2):16-22.DENG Yongfeng, ZHOU Mingxing. Research of erection techniques for steel truss girder of Huanggang Yangtze River rail-cum-road bridge[J]. Bridge Construction, 2013,43(2):16-22.
[5] ZHANG H, ZHOU R Z. Research on lifting techniques of large segments of steel box girder of Chongqi bridge[J].Advanced Materials Research, 2012:446-449.
[6]肖忠宽.钢桁梁整节段架设技术方案比选[J].铁路工程造价管理, 2014, 29(3):46-48.XIAO Zhongkuan. Scheme comparision and selection of the whole segmen erection technology of steel truss beam[J]. Railway Engineering Cost Management, 2014,29(3):46-48.
[7]张德铭.天兴洲大桥钢桁梁桥整节段架设技术[J].桥梁建设, 2006(增1):52-56.ZHANG Deming. Construction techniques for erection of mololithic blocks of steel truss girder bridge of Tianxingzhou bridge[J]. Bridge Construction, 2006(Suppl1):52-56.
[8]张东亮,沈继民,侯朝阳.斜拉桥塔柱钢桁梁同步施工技术[J].安徽建筑, 2014, 21(2):127+144.ZHANG Dongliang, SHEN Jimin, HOU Chaoyang.Synchronous construction technology cable-stayed bridge tower and steel truss girder[J]. Anhui Architecture, 2014,21(2):127+144.
[9]童林鸿,王林.安庆长江铁路大桥主桥无索区钢桁梁架设技术[J].桥梁建设, 2013, 43(3):37-41.TONG Linhong, WANG Lin. Erection techniques for steel truss girder of main bridge of Anqing Yangtze River railway bridge in areas without stay cables[J]. Bridge Construction, 2013, 43(3):37-41.
[10] WANG H, LI A, HU R, et al. Accurate stress analysis on steel box girder of long-span suspension bridges based on multi-scale submodeling method[J]. Advances in Structural Engineering, 2010, 13(4):727-740.
[11] DING Y, LI A, SUN J, et al. Experimental and analytical studies on static and dynamic characteristics of steel box girder for Runyang cable-stayed bridge[J]. Advances in Structural Engineering, 2009, 11(4):425-438.
[12] HAN B, PU Q H, SHI Z, et al. Study on orthotropic deck plate fatigue test model scheme of box girder of railway cable-stayed bridge[J]. Applied Mechanics and Materials,2013, 361-363:1199-1205.
[13] YAO C Y, PU Q H, YAO Y D. Mechanical features of cable-girder anchorage for long-span railway cable-stayed bridge with steel box girders[J]. Applied Mechanics and Materials, 2014, 587-589:1391-1394.
[14] LUO R D, WANG H L, HU J H. Deformation and stress analysis of an asymmetric single tower cable-stayed bridge on high speed railway in swiveling process[J].Advanced Materials Research, 2015, 1079-1080:359-363.
[15]叶梅新,韩衍群,张敏. ANSYS二次开发技术在确定斜拉桥初始恒载索力中的应用[J].铁道科学与工程学报, 2005, 2(5):56-59.YE Meixin, HAN Yanqun, ZHANG Min. Development and application of ANSYS in long-span cable-stayed bridge[J]. Journal of Railway Science and Engineering,2005, 2(5):56-59.
[16]江辉,李龙,胡程.蒙华铁路洞庭湖大桥主桥钢桁梁架设拉开帷幕[EB/OL].[2017-04-21]. http://www.ztmbec.com/tabid/3075/InfoID/99791/frtid/3094/Default.aspx.JIANG Hui, LI Long, HU Cheng. Erection of steel truss girder of main bridge of Dongting Lake bridge on Inner Mongolia-Jianxi Railway[EB/OL].[2017-04-21].http://www.ztmbec.com/tabid/3075/Info ID/99791/frtid/3094/Default.aspx.
[17]中铁大桥局集团有限公司.蒙华铁路洞庭湖大桥主体工程完工[EB/OL].[2017-08-21]. http://www.ztmbec.com/tabid/3075/InfoID/122969/frtid/3094/Default.aspx.China Railway Major Bridge Engineering Group Co., Ltd.Completion of main works of Dongting Lake bridge on Inner Mongolia-Jianxi Railway[EB/OL].[2017-08-21].http://www.ztmbec.com/tabid/3075/InfoID/122969/frtid/3094/Default.aspx.