异步悬灌转体梁精确合龙施工关键技术
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摘要
结合已经成功实施转体的杭黄铁路扬之水特大桥连续梁施工过程,就该类型桥梁转体施工以及异步悬灌合龙精度控制的过程进行施工总结,重点对测量监控、梁体的称重与配重、球铰安装、转动作业控制、梁体姿态调整与定位等关键工序进行了介绍,过程采取的工艺方法满足设计和施工要求,现场采集的数据值与理论计算值吻合较好,精度值满足规范和验收标准,证明了施工过程采取的方案措施可行。
According to the continuous beam construction process of Yangzhishui Super-large Bridge in Hangzhou-Huanghai Railway which has been successfully implemented,the rotating technologies and closure precision control are summarized about the asynchronous cantilever-concreting bridge. The emphases are laid on the measurement monitoring,weighing and setting weight,installing ball hinge,turning operation control,adjusting the beam posture and positioning and other key processes. The technology adopted in the process satisfies the design and construction requirements. The data collected at the scene is well agreed with the theoretical calculation values,and the accuracy values meet the specification and acceptance criteria. It is proved that the construction process is feasible.
According to the continuous beam construction process of Yangzhishui Super-large Bridge in Hangzhou-Huanghai Railway which has been successfully implemented,the rotating technologies and closure precision control are summarized about the asynchronous cantilever-concreting bridge. The emphases are laid on the measurement monitoring,weighing and setting weight,installing ball hinge,turning operation control,adjusting the beam posture and positioning and other key processes. The technology adopted in the process satisfies the design and construction requirements. The data collected at the scene is well agreed with the theoretical calculation values,and the accuracy values meet the specification and acceptance criteria. It is proved that the construction process is feasible.
引文
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[6]邢世玲,张佳,朱利明.独柱混凝土曲线连续梁桥抗倾覆稳定性研究[J].世界桥梁,2017,45(5):33-38.
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[11]中华人民共和国交通运输部.公路桥涵施工技术规范:JTG/T F50-2011[S].北京:人民交通出版社,2011:212-213.
[12]张相玺.跨铁路同步转体桥施工阶段梁体应力及变形监测研究[J].铁道建筑技术,2016(8):23-26.
[2]上官兴,蔡长贵,刘尚云.洞庭湖区桥梁建设新技术的开发研究[J].湖南交通科技,1995,21(1):16-20.
[3]崔金灿.大跨度预应力混凝土连续梁桥预应力损失对长期挠度的影响[D].石家庄:石家庄铁道大学,2013:30-35.
[4]杨琪,辛镜坤,李卫民,等.已建大跨径PC梁桥长期下挠的加固对策研究[J].桥梁建设,2009(6):80-84.
[5]余霖.宽度渐变连续梁不平衡称重水平转体控制技术研究[J].铁道建筑技术,2016(8):27-30.
[6]邢世玲,张佳,朱利明.独柱混凝土曲线连续梁桥抗倾覆稳定性研究[J].世界桥梁,2017,45(5):33-38.
[7]周水兴,何兆益,邹毅松,等.路桥施工计算手册[M]北京:人民交通出版社,2012:136-138.
[8]袁可.桥梁转体施工的关键控制点分析[J].铁道建筑技术,2016(5):9-11.
[9]铁道部工程设计鉴定中心.1995-2010中国铁路大桥资料汇编[G].天津:铁道第三勘察设计院集团有限公司,2011:468-472.
[10]郑健.中国高速铁路桥梁[M].北京:高等教育出版社,2008:370-376.
[11]中华人民共和国交通运输部.公路桥涵施工技术规范:JTG/T F50-2011[S].北京:人民交通出版社,2011:212-213.
[12]张相玺.跨铁路同步转体桥施工阶段梁体应力及变形监测研究[J].铁道建筑技术,2016(8):23-26.