| 大跨连续梁桥单墩顶升工艺设计与过程监控 |
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| 引用本文： | 刘萌,刘世忠,冀伟.大跨连续梁桥单墩顶升工艺设计与过程监控[J].兰州铁道学院学报,2011,30(1). |
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| 作者姓名： | 刘萌 刘世忠 冀伟 |
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| 作者单位： | 兰州交通大学甘肃省道路桥梁与地下工程重点实验室,甘肃,兰州,730070 |
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| 基金项目： | 国家自然科学基金，甘肃省科技计划资助，甘肃省道路桥梁与地下工程重点实验室开放基金 |
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| 摘 要： | 以一大跨连续梁桥为例,介绍了单墩顶升更换支座的施工工艺及顶升过程的监测控制.根据施工现场实际情况选择了合适的千斤顶群、专门设计了临时支撑、编制了科学的施工工艺辅以监控措施作为技术保障;采用有限元仿真技术建立了该桥施工阶段仿真模型及临时支撑模型作为施工理论指导,以梁体混凝土不出现拉应力为目标函数控制梁体顶升高度.实践证明:基于信息化平台的更换支座施工工艺安全是有保障的,具有广泛的工程应用价值,对同类工程具有借鉴作用.
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| 关 键 词： | 单墩顶升 临时支撑 顶升工艺 监测控制 有限元 信息化施工 |
Construction Technology Design and Process Monitoring of Single-pier Jacking-up in the Large-span Continuous Girder Bridge |
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| LIU Meng,LIU Shi-zhong,JI Wei.Construction Technology Design and Process Monitoring of Single-pier Jacking-up in the Large-span Continuous Girder Bridge[J].Journal of Lanzhou Railway University,2011,30(1). |
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| Authors: | LIU Meng LIU Shi-zhong JI Wei |
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| Institution: | LIU Meng,LIU Shi-zhong,JI Wei(Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province,Lanzhou Jiaotong University,Lanzhou 730070,China) |
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| Abstract: | Taken a large-span continuous girder bridge as an example,this paper introduced the construction technology of replacing bearings with single-pier jacking method and the monitoring and control of the process.Firstly,the appropriate lifting jack group was selected according to the actual site situation and temporary support structures were specially designed.Then scientific construction technology supplemented control measures as technical support were prepared.After that,the simulation model of construction... |
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| Keywords: | single-pier jacking-up temporary support structure jacking-up technology monitoring and control finite element information construction |
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