银西高铁银川机场黄河特大桥主桥总体设计
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摘要
银川至西安高铁银川机场黄河特大桥,主桥采用96 m简支钢桁梁与等跨度168 m连续钢桁柔性拱两种结构形式。主桥采用的等跨度连续钢桁梁柔性拱结构,形式新颖、技术复杂。主桥跨越黄河,桥址地震烈度高,冬季冰凌现象严重,可用施工工期短。由于本桥建设条件的特殊性,导致设计施工难度大。为展现主桥设计与施工的特点,对主桥的桥式方案选择、总体布置、桥面设置、吊杆设计、基础设置等进行介绍,并给出主要计算结果及吊杆试验结果,着重对本桥的抗震设计、支座设计、螺栓防落设计中所采用的关键技术进行叙述,最后对主桥采用的创新性施工方案进行说明。
The simple steel truss girder with span of 96 m and equal span of 168 m continuous steel girder flexible arch structures are used in the main bridge of Yinchuan Airport Yellow River Bridge on Yinchuan to Xi'an High Speed Railway.The structure of the continuous steel truss with flexible arch employed in the main bridge is novel in form and technically complex.The main bridge spans over the Yellow River.The seismic intensity of the bridge site is high,the icing is severe in winter and the available construction period is short.Due to the special construction conditions of this bridge,it is difficult to design and construct the bridge.In order to demonstrate the characteristics of the design and construction of the main bridge,the selection of the scheme of the main bridge,the overall layout,the installation of the bridge deck,the design of the boom and the basic settings are introduced.The main calculation results and the boom test results are presented.The key technologies used in the seismic design,support design,and bolt fall prevention design of this bridge are addressed.Finally,the innovative construction scheme adopted for the main bridge is illustrated.
The simple steel truss girder with span of 96 m and equal span of 168 m continuous steel girder flexible arch structures are used in the main bridge of Yinchuan Airport Yellow River Bridge on Yinchuan to Xi'an High Speed Railway.The structure of the continuous steel truss with flexible arch employed in the main bridge is novel in form and technically complex.The main bridge spans over the Yellow River.The seismic intensity of the bridge site is high,the icing is severe in winter and the available construction period is short.Due to the special construction conditions of this bridge,it is difficult to design and construct the bridge.In order to demonstrate the characteristics of the design and construction of the main bridge,the selection of the scheme of the main bridge,the overall layout,the installation of the bridge deck,the design of the boom and the basic settings are introduced.The main calculation results and the boom test results are presented.The key technologies used in the seismic design,support design,and bolt fall prevention design of this bridge are addressed.Finally,the innovative construction scheme adopted for the main bridge is illustrated.
引文
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[21]李聪,易中楼,杨华松,等.南淝河特大跨度钢桁梁拱桥施工过程中强度分析与加固[J].空间结构,2014(6):64-70.
[2]张杰.厦深铁路榕江桥主桥设计及优化[J].铁道建筑,2011(2):29-32.
[3]郑辉.柔性拱钢性梁桥设计[J].重庆交通大学学报(自然科学版),2011(6):691-692.
[4]侯健,彭振华,张燕飞.沪通长江大桥天生港专用航道桥设计[J].桥梁建设,2015(6):53-57.
[5]高宗余,梅新咏,徐伟,等.沪通长江大桥总体设计[J].桥梁建设,2015(6):1-6.
[6]尤庆忠.大跨度钢桁拱桥矩形箱式吊杆风振性能[J].长沙理工大学学报(自然科学版),2011(12):49-53.
[7]陈政清,刘慕广,刘光栋,等.H型吊杆的大攻角风致振动和抗风设计[J].土木工程学报,2010(2):1-11.
[8]高宗余,李龙安,方秦汉,等.钢桁拱桥吊杆风致振动研究[J].武汉理工大学学报(交通科学与工程版),2007(2):281-284.
[9]刘慕广,陈政清.箱型吊杆的风致振动特性[J].工程力学,2013(3):233-238.
[10]刘慕广,陈政清.不同截面参数H型吊杆的气动性能[J].工程力学,2013(5):221-226.
[11]李家茂.榕江特大桥吊杆抗风性能评估[J].科学技术与工程,2012(4):825-828.
[12]方兴,白玲,刘磊.南京大胜关长江大桥钢吊杆两端连接涡振疲劳性能的仿真分析[J].铁道建筑,2011(3):1-3.
[13]陈政清,刘慕广,牟廷敏,等.H型截面细长杆件颤振稳定性试验研究[J].空气动力学学报,2009(1):41-46.
[14]雷旭,牛华伟,陈政清,等.大跨度钢拱桥吊杆减振的新型电涡流TMD开发与应用[J].中国公路学报,2015(4):60-68.
[15]穆金禄,胡贵琼.高强度螺栓的安全度-防止九江长江大桥高强度螺栓延迟断裂的建议[J].桥梁建设,1996(1):50-52.
[16]宋志慧,郑慧敏.钢结构高强螺栓脆性断裂的研究现状[J].建材技术与应用,2012(1):11-13.
[17]胡杰,邹定强,杨其全.铁路用20MnTiB钢高强度螺栓的断裂失效分析[J].金属热处理,2017(7):185-188.
[18]黄耀怡,代宇.钢桁柔性拱钢桥的架设方法与施工装备设计[J].桥梁,2010(10):1-7.
[19]周建波.京沪高铁济南黄河大桥钢梁设计与施工[J].钢结构,2013(8):51-53.
[20]鄢怀斌,周云,李慧明.厦深铁路榕江特大桥主桥连续钢桁梁柔性拱施工关键技术[J].世界桥梁,2014(4):6-9.
[21]李聪,易中楼,杨华松,等.南淝河特大跨度钢桁梁拱桥施工过程中强度分析与加固[J].空间结构,2014(6):64-70.