商合杭铁路芜湖长江公铁大桥主桥钢梁设计
|
摘要
商合杭铁路芜湖长江公铁大桥主桥为主跨588m的非对称矮塔斜拉桥。为适应该桥塔矮、索平以及主梁水平轴力大的特点,主梁采用双层桥面箱桁组合结构钢梁,下层为整体钢箱以承担大部分主梁恒载及铁路活载,上层为板桁组合结构以承担剩余恒载及公路活载。主桁采用三角形桁式,桁高15m。斜拉索锚固于下弦杆件,单个钢锚箱内锚固2根最大索力为16 000kN的斜拉索。公路桥面系采用正交异性钢桥面板,铁路桥面系采用封闭式整体钢箱桥面。针对运营状态下在辅助墩处出现支座负反力的情况,采取部分铁路桥面结合梁及箱内压重的措施。钢梁架设采用箱桁同步成桥的方案。
The main bridge of Wuhu Changjiang River Rail-cum-Road Bridge of ShangqiuHefei-Hangzhou Railway is an asymmetric extradosed cable-stayed bridge with a main span of 588 m.A box-truss composite steel structure is adopted for the main girder to adapt to characteristics of low pylons,small inclined angles of cables,and great horizontal force.The bridge has two layers,the lower deck is made of integral steel box girder and is designed to bear most of the dead load and railway live load,and the upper deck has a plate-truss composite structure and is designed to bear the remaining dead load and highway live load.Triangular truss is used for the main truss,of which the height is 15 m.Stay cables are anchored to the steel anchor boxes at lower chord.Each steel anchor box has two cables anchored with maximum cable force of 16 000 kN.The orthotropic plate is adopted for highway deck,and the integral closed steel box is adopted for railway deck.To avoid negative vertical reaction force at the auxiliary pier under the operation condition,steel-concrete composite bridge deck is adopted for the lower railway deck and concrete blocks are also implemented to balance the vertical force.The scheme that lower deck and the trusses are installed synchronously during erection of steel girder is adopted.
The main bridge of Wuhu Changjiang River Rail-cum-Road Bridge of ShangqiuHefei-Hangzhou Railway is an asymmetric extradosed cable-stayed bridge with a main span of 588 m.A box-truss composite steel structure is adopted for the main girder to adapt to characteristics of low pylons,small inclined angles of cables,and great horizontal force.The bridge has two layers,the lower deck is made of integral steel box girder and is designed to bear most of the dead load and railway live load,and the upper deck has a plate-truss composite structure and is designed to bear the remaining dead load and highway live load.Triangular truss is used for the main truss,of which the height is 15 m.Stay cables are anchored to the steel anchor boxes at lower chord.Each steel anchor box has two cables anchored with maximum cable force of 16 000 kN.The orthotropic plate is adopted for highway deck,and the integral closed steel box is adopted for railway deck.To avoid negative vertical reaction force at the auxiliary pier under the operation condition,steel-concrete composite bridge deck is adopted for the lower railway deck and concrete blocks are also implemented to balance the vertical force.The scheme that lower deck and the trusses are installed synchronously during erection of steel girder is adopted.
引文
[1]中铁大桥勘测设计院集团有限公司.商合杭铁路芜湖长江公铁大桥及相关工程施工图[Z].武汉:2015.(China Railway Major Bridge Reconnaissance&Design Group Co.,Ltd.Construction Drawing of Wuhu Changjiang River Rail-cum-Road Bridge and Related Projects of Shangqiu-Hefei-Hangzhou Railway[Z].Wuhan:2015.in chinese)
[2]高宗余.沪通长江大桥主桥技术特点[J].桥梁建设,2014,44(2):1-5.(GAO Zong-yu.Technical Characteristics of Main Bridge of Hutong Changjiang River Bridge[J].Bridge Construction,2014,44(2):1-5.in Chinese)
[3]易伦雄.铁路斜拉桥板-桁组合结构主梁及其施工方法[J].钢结构,2016,31(1):86-88,31.(YI Lun-xiong.Plate-Truss Composite Structure of Railway Cable-Stayed Bridge and Its Construction Method[J].Steel Structure,2016,31(1):86-88,31.in Chinese)
[4]徐伟,郑清刚,彭振华.沪通长江大桥主航道桥主桥钢梁设计[J].桥梁建设,2015,45(6):47-52.(XU Wei,ZHENG Qing-gang,PENG Zhen-hua.Stuctural Design of Main Girder of Main Ship Channel Bridge of Hutong Changjiang River Bridge[J].Bridge Construction,2015,45(6):47-52.in Chinese)
[5]杜萍,万田保.铜陵公铁两用长江大桥主桥钢梁设计[J].桥梁建设,2014,44(2):6-11.(DU Ping,WAN Tian-bao.Design of Steel Girder of Main Bridge of Tongling Changjiang River Rail-cumRoad Bridge[J].Bridge Construction,2014,44(2):6-11.in Chinese)
[6]文坡,杨光武,徐伟.黄冈公铁两用长江大桥主桥钢梁设计[J].桥梁建设,2014,44(3):1-6.(WEN Po,YANG Guang-wu,XU Wei.Design of Steel Girder of Main Bridge of Huanggang Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2014,44(3):1-6.in Chinese)
[7]赖亚平,邓宇,马振栋.公轨两用高低塔斜拉桥钢桁梁设计研究[J].钢结构,2016,31(9):67-72.(LAI Ya-ping,DENG Yu,MA Zhen-dong.Design and Study of Steel Truss Girder of Rall-Cum-Road Cable-Stayed Bridge with High and Low Pylons[J].Steel Structure,2016,31(9):67-72.in Chinese)
[8]苏学波.大跨度铁路矮塔斜拉桥钢主梁选型研究[J].世界桥梁,2016,44(4):26-29.(SU Xue-bo.Study of Type Selection for Steel Main Girder of Long-Span Railway Extradosed Bridge[J].World Bridges,2016,44(4):26-29.in Chinese)
[9]易伦雄.洞庭湖主跨406m三塔铁路斜拉桥设计关键技术[J].桥梁建设,2018,48(5):86-90.(YI Lun-xiong.Key Techniques for Design of Dongting Lake Three-Pylon Railway Cable-Stayed Bridge with Main Span of 406m[J].Bridge Construction,2018,48(5):86-90.in Chinese)
[10]周外男,王令侠.芜湖长江公铁大桥主桥钢梁架设方案[J].桥梁建设,2018,48(1):1-6.(ZHOU Wai-nan,WANG Ling-xia.Erection Scheme for Steel Girder of Main Bridge of Wuhu Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2018,48(1):1-6.in Chinese)
[2]高宗余.沪通长江大桥主桥技术特点[J].桥梁建设,2014,44(2):1-5.(GAO Zong-yu.Technical Characteristics of Main Bridge of Hutong Changjiang River Bridge[J].Bridge Construction,2014,44(2):1-5.in Chinese)
[3]易伦雄.铁路斜拉桥板-桁组合结构主梁及其施工方法[J].钢结构,2016,31(1):86-88,31.(YI Lun-xiong.Plate-Truss Composite Structure of Railway Cable-Stayed Bridge and Its Construction Method[J].Steel Structure,2016,31(1):86-88,31.in Chinese)
[4]徐伟,郑清刚,彭振华.沪通长江大桥主航道桥主桥钢梁设计[J].桥梁建设,2015,45(6):47-52.(XU Wei,ZHENG Qing-gang,PENG Zhen-hua.Stuctural Design of Main Girder of Main Ship Channel Bridge of Hutong Changjiang River Bridge[J].Bridge Construction,2015,45(6):47-52.in Chinese)
[5]杜萍,万田保.铜陵公铁两用长江大桥主桥钢梁设计[J].桥梁建设,2014,44(2):6-11.(DU Ping,WAN Tian-bao.Design of Steel Girder of Main Bridge of Tongling Changjiang River Rail-cumRoad Bridge[J].Bridge Construction,2014,44(2):6-11.in Chinese)
[6]文坡,杨光武,徐伟.黄冈公铁两用长江大桥主桥钢梁设计[J].桥梁建设,2014,44(3):1-6.(WEN Po,YANG Guang-wu,XU Wei.Design of Steel Girder of Main Bridge of Huanggang Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2014,44(3):1-6.in Chinese)
[7]赖亚平,邓宇,马振栋.公轨两用高低塔斜拉桥钢桁梁设计研究[J].钢结构,2016,31(9):67-72.(LAI Ya-ping,DENG Yu,MA Zhen-dong.Design and Study of Steel Truss Girder of Rall-Cum-Road Cable-Stayed Bridge with High and Low Pylons[J].Steel Structure,2016,31(9):67-72.in Chinese)
[8]苏学波.大跨度铁路矮塔斜拉桥钢主梁选型研究[J].世界桥梁,2016,44(4):26-29.(SU Xue-bo.Study of Type Selection for Steel Main Girder of Long-Span Railway Extradosed Bridge[J].World Bridges,2016,44(4):26-29.in Chinese)
[9]易伦雄.洞庭湖主跨406m三塔铁路斜拉桥设计关键技术[J].桥梁建设,2018,48(5):86-90.(YI Lun-xiong.Key Techniques for Design of Dongting Lake Three-Pylon Railway Cable-Stayed Bridge with Main Span of 406m[J].Bridge Construction,2018,48(5):86-90.in Chinese)
[10]周外男,王令侠.芜湖长江公铁大桥主桥钢梁架设方案[J].桥梁建设,2018,48(1):1-6.(ZHOU Wai-nan,WANG Ling-xia.Erection Scheme for Steel Girder of Main Bridge of Wuhu Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2018,48(1):1-6.in Chinese)