高速铁路特大桥上双块式轨道结构设计及施工质量控制
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摘要
北盘江特大桥桥跨布置方式特殊,对轨道结构形式及施工质量有严格要求。桥上采用双块式单元道床板与纵连底座相结合的轨道结构形式。在道床板和底座之间设置隔离层,同时在道床板两端底面设置与底座板一体的限位凸台限制其位移,可降低结构的整体破坏可能,保证结构的稳定性。对比不同端刺结构方案对轨道结构的受力变形影响,并从施工角度叙述道床板和底座板施工的施工工艺及质量控制要点。在隧道内采用不设端刺的摩擦板方案,既减小了对隧道内轨道结构影响,又保证了桥上轨道结构安全稳定,且有利于节省工程投资,便于施工质量控制;对施工各环节进程质量控制,可提高轨道的使用寿命,降低后期维护成本。
Beipanjiang major bridge is designed with special bridge span arrangement,which has strict requirements for track structure form and construction quality. Double-slab ballastless track and continuous seating plates are used on the bridge. An isolation layer is provided between the road deck and the base,while the limit boss is set in integration with the seating plate at the two ends of the track slab bottom to reduce possible overall damage and ensure the stability of the structure. The effects of force and deformation generated by different programs of the thorns track structure are compared, and construction processes of double-slab ballastless track and continuous seating plate and key quality control points are illustrated. The applied program uses friction plate without end thorn,which not only reduces the impact on track structure in the tunnel,ensures the security and stability of the bridge track structure,but also helps save investment and reinforce quality control. In addition,process quality control prolongs track service life and cuts maintenance cost.
Beipanjiang major bridge is designed with special bridge span arrangement,which has strict requirements for track structure form and construction quality. Double-slab ballastless track and continuous seating plates are used on the bridge. An isolation layer is provided between the road deck and the base,while the limit boss is set in integration with the seating plate at the two ends of the track slab bottom to reduce possible overall damage and ensure the stability of the structure. The effects of force and deformation generated by different programs of the thorns track structure are compared, and construction processes of double-slab ballastless track and continuous seating plate and key quality control points are illustrated. The applied program uses friction plate without end thorn,which not only reduces the impact on track structure in the tunnel,ensures the security and stability of the bridge track structure,but also helps save investment and reinforce quality control. In addition,process quality control prolongs track service life and cuts maintenance cost.
引文
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[3]姚宏生,王春阳.沪杭高速铁路CRTSⅡ型无砟轨道桥上底座板施工技术研究[J].铁道标准设计,2011(1):39-45.
[4]惠小锋.CRTSⅡ型板式无砟轨道底座张拉技术探讨[J].铁道标准设计,2011(10):15-18.
[5]郑先奇.京沪高速铁路CRTSⅡ型板式无砟轨道长桥底座板施工技术[J].铁道标准设计,2012(2):38-43.
[6]陈亚敏.京沪高速铁路CRTSⅡ型板式无砟轨道底座板施工技术研究[J].铁道标准设计,2011(3):21-25.
[7]王可用.高速铁路CRTSⅡ型板式无砟轨道底座板施工质量控制[J].铁道建筑,2013(4):128-130.
[8]赵坪锐,胡佳,刘观.长大桥梁上CRTSⅡ型板式无砟轨道底座板施工工艺优化检算[J].铁道建筑,2014(6):142-145.
[9]姜浩,刘志斌,刘观,等.施工过程中温度变化对CRTSⅡ型板式无砟轨道底座板的影响[J].铁道标准设计,2015(5):40-47.
[10]刘永存.桥上CRTSⅡ型板式无砟轨道底座板张拉纵连模拟分析[J].铁道标准设计,2014(9):44-48.
[11]卿三惠,陈叔,胡建.CRTSⅡ型板式无砟轨道施工关键设备及施工技术研究[J].铁道工程学报,2008(7):22-27.
[12]赵东田.双块式无砟轨道施工质量控制及措施[J].铁道工程学报,2009(5):24-27.
[13]王志红.CRTSⅠ型双块式无砟轨道道床板轨排框架法施工技术[J].铁道建筑,2014(5):142-144.
[14]陈政.CRTSⅠ型双块式无砟轨道道床板轨排稳定控制技术[J].铁道建筑,2010(1):30-31.
[15]戴宇,孙红军.CRTSⅠ型双块式无砟轨道轨枕预制与铺设技术[M].北京:中国铁道出版社,2013.
[16]韦合导,王森荣.高速铁路双块式无砟轨道结构设计及施工技术[J].铁道建筑技术,2008(2):44-47.