三门峡黄河公铁两用大桥主桥钢桁结合梁设计
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摘要
三门峡黄河公铁两用大桥主桥为(84+9×108+84)m的11跨连续钢桁结合梁桥,采用双层桥面布置,下层桥面通行4线铁路(双线蒙西通道+双线运三铁路),上层桥面通行双向6车道高速公路。该桥主梁采用密横梁体系钢桁结合梁,横向布置3片主桁,主桁采用三角形桁式。下层铁路桥面采用密横梁体系的正交异性整体钢桥面板,钢轨处设置倒T形小纵梁;上层公路桥面采用C60的钢筋混凝土结合板,通过湿接缝和剪力钉与钢主桁上弦杆及横梁结合为整体;主桁横向未设置联结系,仅在两端的公路横梁底设置板式桥门架。采取选择合理的混凝土板结合及顶落梁工序、选择合适的预制板存放龄期、湿接缝处理和加强预制板配筋等措施改善结合梁负弯矩区混凝土板受拉开裂的问题。主桥钢桁梁采用拖拉式顶推的方法施工。
The main bridge of Sanmenxia Huanghe River Rail-cum-Road Bridge is a 11-span continuous steel truss composite girder bridge with span arrangement(84+9×108+84)m.The bridge is designed as a double-deck bridge.The lower deck of the bridge is to carry the 4-track railways(2 tracks for Inner Mongolia Westbound Railway+2 tracks for Yuncheng-Sanmenxia Railway)while the upper deck to carry the dual 3-lane expressways.The main girder of the bridge is the steel truss girder provided with the dense cross beam system.In the transverse direction of the main girder,3 main trusses of the triangle shape trusses are arranged.The lower railway deck is the one having the integral orthotropic steel deck plates supported on the dense cross beam system and at the locations where the steel rails are to be laid,the inverted T-shape stringers are arranged.The upper highway deck is the one having the C60 reinforced concrete deck slabs that are connected into an integrity with the upper chords and cross beams of the steel main trusses via the wet joints and shear studs.In the transverse direction of the main trusses,the bracing systems are not arranged while only at the bottom of the highway cross beams at the both ends,the plate portal frames are arranged.A number of the measures of selecting the proper working procedures for the concrete slab connecting and the main truss jacking-up and-down and of selecting the proper storage age of the precast concrete slabs,properly handling the wet joints and enhancing the reinforcement in the concrete slabs was taken so as to improve the tensile cracking problem of the concrete slabs in the sagging moment areas of the composite girder.The steel trusses of the main bridge are to be erected by the hauling and pushing construction method.
The main bridge of Sanmenxia Huanghe River Rail-cum-Road Bridge is a 11-span continuous steel truss composite girder bridge with span arrangement(84+9×108+84)m.The bridge is designed as a double-deck bridge.The lower deck of the bridge is to carry the 4-track railways(2 tracks for Inner Mongolia Westbound Railway+2 tracks for Yuncheng-Sanmenxia Railway)while the upper deck to carry the dual 3-lane expressways.The main girder of the bridge is the steel truss girder provided with the dense cross beam system.In the transverse direction of the main girder,3 main trusses of the triangle shape trusses are arranged.The lower railway deck is the one having the integral orthotropic steel deck plates supported on the dense cross beam system and at the locations where the steel rails are to be laid,the inverted T-shape stringers are arranged.The upper highway deck is the one having the C60 reinforced concrete deck slabs that are connected into an integrity with the upper chords and cross beams of the steel main trusses via the wet joints and shear studs.In the transverse direction of the main trusses,the bracing systems are not arranged while only at the bottom of the highway cross beams at the both ends,the plate portal frames are arranged.A number of the measures of selecting the proper working procedures for the concrete slab connecting and the main truss jacking-up and-down and of selecting the proper storage age of the precast concrete slabs,properly handling the wet joints and enhancing the reinforcement in the concrete slabs was taken so as to improve the tensile cracking problem of the concrete slabs in the sagging moment areas of the composite girder.The steel trusses of the main bridge are to be erected by the hauling and pushing construction method.
引文
[1]刘俊锋,阮怀圣,宁伯伟.三门峡黄河公铁两用大桥主桥减隔震设计[J].桥梁建设,2014,44(2):91-95.(LIU Jun-feng,RUAN Huai-sheng,NING Bo-wei.Seismic Mitigation and Isolation Design of Main Bridge of Sanmenxia Huanghe River Rail-cum-Road Bridge[J].Bridge Construction,2014,44(2):91-95.in Chinese)
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[4]秦顺全,高宗余,潘东发.武汉天兴洲公铁两用长江大桥关键技术研究[J].桥梁建设,2007(1):1-4,20.(QIN Shun-quan,GAO Zong-yu,PAN Dong-fa.Research of Key Techniques for Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2007(1):1-4,20.in Chinese)
[5]康晋,段雪炜,徐伟.平潭海峡公铁两用大桥主桥整节段全焊钢桁梁设计[J].桥梁建设,2015,45(5):1-6.(KANG Jin,DUAN Xue-wei,XU Wei.Design of Full Block and All-Welded Steel Truss Girder of Main Bridge of Pingtan Straits Rail-cum-Road Bridge[J].Bridge Construction,2015,45(5):1-6.in Chinese)
[6]李卫华,杨光武,徐伟.黄冈公铁两用长江大桥主跨567m钢桁梁斜拉桥设计[J].桥梁建设,2013,43(2):10-14.(LI Wei-hua,YANG Guang-wu,XU Wei.Design of Steel Truss Girder Cable-Stayed Bridge of 567m Main Span of Huanggang Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2013,43(2):10-14.in Chinese)
[7]肖海珠,易伦雄.南京大胜关长江大桥主桥上部结构设计[J].桥梁建设,2010(1):1-4.(XIAO Hai-zhu,YI Lun-xiong.Design of Superstructure of Main Bridge of Nanjing Dashengguan Changjiang River Bridge[J].Bridge Construction,2010(1):1-4.in Chinese)
[8]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)
[9]陈亮,邵长宇.结合梁斜拉桥混凝土收缩徐变影响规律[J].桥梁建设,2015,45(1):74-78.(CHEN Liang,SHAO Chang-yu.Influential Laws of Concrete Shrinkage and Creep of Composite Girder Cable-Stayed Bridge[J].Bridge Construction,2015,45(1):74-78.in Chinese)
[10]韩衍群,叶梅新.连续钢桁结合梁桥桥面系受力状态及与桥面系刚度的关系[J].中南大学学报(自然科学版),2008,39(2):387-393.(HAN Yan-qun,YE Mei-xin.Relationship Between Load Bearing and Stiffness of Floor System in Continuous Steel Truss Composite Bridge[J].Journal of Central South University(Science and Technology),2008,39(2):387-393.in Chinese)
[2]肖鑫,刘晓光,赵欣欣,等.下承式密布横梁体系钢桁结合梁桥受力性能分析[J].铁道建筑,2017(6):1-6.(XIAO Xin,LIU Xiao-guang,ZHAO Xin-xin,et al.Mechanical Behavior Analysis of Through Steel Truss Composite Girder Bridge with Multi-Cross-Beam System[J].Railway Engineering,2017(6):1-6.in Chinese)
[3]陈佳,胡文军.高速铁路下承式钢桁结合梁桥桥面荷载传力途径研究[J].世界桥梁,2013,41(3):47-51.(CHEN Jia,HU Wen-jun,Study of Deck Load Transferring Path for Through Steel Truss Composite Girder Bridge Carrying High Speed Railway[J].World Bridges,2013,41(3):47-51.in Chinese)
[4]秦顺全,高宗余,潘东发.武汉天兴洲公铁两用长江大桥关键技术研究[J].桥梁建设,2007(1):1-4,20.(QIN Shun-quan,GAO Zong-yu,PAN Dong-fa.Research of Key Techniques for Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2007(1):1-4,20.in Chinese)
[5]康晋,段雪炜,徐伟.平潭海峡公铁两用大桥主桥整节段全焊钢桁梁设计[J].桥梁建设,2015,45(5):1-6.(KANG Jin,DUAN Xue-wei,XU Wei.Design of Full Block and All-Welded Steel Truss Girder of Main Bridge of Pingtan Straits Rail-cum-Road Bridge[J].Bridge Construction,2015,45(5):1-6.in Chinese)
[6]李卫华,杨光武,徐伟.黄冈公铁两用长江大桥主跨567m钢桁梁斜拉桥设计[J].桥梁建设,2013,43(2):10-14.(LI Wei-hua,YANG Guang-wu,XU Wei.Design of Steel Truss Girder Cable-Stayed Bridge of 567m Main Span of Huanggang Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2013,43(2):10-14.in Chinese)
[7]肖海珠,易伦雄.南京大胜关长江大桥主桥上部结构设计[J].桥梁建设,2010(1):1-4.(XIAO Hai-zhu,YI Lun-xiong.Design of Superstructure of Main Bridge of Nanjing Dashengguan Changjiang River Bridge[J].Bridge Construction,2010(1):1-4.in Chinese)
[8]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)
[9]陈亮,邵长宇.结合梁斜拉桥混凝土收缩徐变影响规律[J].桥梁建设,2015,45(1):74-78.(CHEN Liang,SHAO Chang-yu.Influential Laws of Concrete Shrinkage and Creep of Composite Girder Cable-Stayed Bridge[J].Bridge Construction,2015,45(1):74-78.in Chinese)
[10]韩衍群,叶梅新.连续钢桁结合梁桥桥面系受力状态及与桥面系刚度的关系[J].中南大学学报(自然科学版),2008,39(2):387-393.(HAN Yan-qun,YE Mei-xin.Relationship Between Load Bearing and Stiffness of Floor System in Continuous Steel Truss Composite Bridge[J].Journal of Central South University(Science and Technology),2008,39(2):387-393.in Chinese)