高速铁路56m节段拼装箱梁短线单独预制法施工技术研究
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摘要
短线单独预制法施工工艺具有节段预制速度快、生产成本低、场地适应性强等典型优势,节段的预制施工质量和线形控制是其两大关键技术控制点。本文通过56 m节段拼装箱梁施工对短线单独预制法施工工艺进行分析研究,结果表明节段块的预制速度快,而预制工序对整个节段拼装箱梁工程工期的影响较小;制梁场工厂化预制措施可以确保节段块的施工质量和线形控制效果;在制梁场内设置坐标控制网,提高模板拼装、预留孔洞、中线控制等方面的精度,可以保证节段块线形的控制精度。
As a construction process, short-term independent prefabrication has many typical advantages, including fast segment precast speed, low production cost and strong site adaptability. During prefabrication construction, its construction quality and linear control were two key points. In this paper, short-term separate precast construction process was analyzed through the construction of 56 m segment assembled box girder. The results show that the segment block has faster prefabrication speed, and the precast process has little effect on the project duration of assembling box girder in the whole section. The factory prefabricated measures for beam-making field can ensure the construction quality and linear control effect of the segment block. And the control accuracy of segment block alignment can be guaranteed by setting coordinate control network in beam-making field and improving the accuracy of template assembling, reserving holes and controlling the midline.
As a construction process, short-term independent prefabrication has many typical advantages, including fast segment precast speed, low production cost and strong site adaptability. During prefabrication construction, its construction quality and linear control were two key points. In this paper, short-term separate precast construction process was analyzed through the construction of 56 m segment assembled box girder. The results show that the segment block has faster prefabrication speed, and the precast process has little effect on the project duration of assembling box girder in the whole section. The factory prefabricated measures for beam-making field can ensure the construction quality and linear control effect of the segment block. And the control accuracy of segment block alignment can be guaranteed by setting coordinate control network in beam-making field and improving the accuracy of template assembling, reserving holes and controlling the midline.
引文
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[2]黄泳.预制箱梁节段拼装技术在高铁客运专线应用探讨[J].铁道建筑技术,2013(9):26-27.
[3]铁道部工程管理中心.节段预制拼装移动造桥机施工技术要点手册[M].北京:中国铁道出版社,2009.
[4]张立青.节段预制拼装法建造桥梁技术综述[J].铁道标准设计,2014(12):63-66.
[5]陈自航,熊健民.短线法预制梁线形控制研究[J].北方交通,2012(3):78-80.
[6]刘亚东.短线法预制节段桥梁施工工艺研究[D].重庆:重庆交通大学,2013.
[7]肖汝诚.桥梁结构分析及程序系统[M].北京:人民交通出版社,2002.
[8]邹小江,寿楠椿,江素华,等.混凝土徐变系数与徐变度的对比分析[J].郑州工业大学学报,2001(1):46-48.
[9]冯延明.上行式桁架型节段拼装移动支架造桥机技术特点及应用[J].铁道标准设计,2010(7):37-40.
[10]张俊平.桥梁检测与维修加固[M].北京:人民交通出版社,2006.
[11]卿三惠.高速铁路施工技术(桥梁工程分册)[M].北京:中国铁道出版社,2013.
[12]樊立龙.客运专线64 m双线节段拼装箱梁施工技术[J].铁道建筑技术,2014(10):14-18.
[13]彭江鸿,周光忠.包西铁路节段拼装梁综合施工技术[J].铁道建筑技术,2010(3):1-5.
[14]帅培建.造桥机在铁路客运专线箱梁施工中的应用及仿真分析[D].重庆:重庆交通大学,2014.