宝兰线三阳川大桥48m节段拼装梁施工技术研究
发布时间：2018-08-02 10:25
【摘要】：架桥机是在桥位处进行拼装,然后逐孔施工的一种大型机械设备。预制节段拼装施工技术是利用架桥机施工中最常见的一中施工方法。节段拼装施工需要经历梁段的拼装、湿接缝混凝土的浇筑、预应力张拉、架桥机脱架及体系转换等几个复杂的过程,在这些过程中,梁体的内力和变形受到各种材料因素的影响,因此研究架桥机和简支梁体不同施工工况下的位移和受力状况并制定详细的施工控制方案不仅关系到架桥机自身的安全而且关系到桥梁最终成桥的线形。论文以宝兰线三阳川特大桥48 m节段拼装简支箱梁为研究背景,首先对节段拼装施工技术的发展状况以及研究现状进行了详细的阐述,随后以宝兰线三阳川特大桥48 m节段拼装简支箱梁为实例,介绍了施工的主要器械TP48节段拼装架桥机的主要构造以及施工的原理及方法,从而将施工过程划分为架桥机就位、梁段块的吊装、湿接缝混凝土的浇筑、预应力张拉及架桥机过孔五个施工阶段,利用有限元软件Midas Civil为工具,通过对架桥机的合理简化,建立了架桥机和混凝土简支梁的整体有限元模型,进行施工阶段的仿真分析,通过对TP48架桥机和混凝土梁体力学行为的分析,得出在节段拼装施工过程中混凝土简支梁体在各施工阶段的线形变化以及关键控制截面的受力情况并找出其在整个施工过程中的变化规律。论文基于上述理论数据的指导,针对宝兰线三阳川特大桥48 m节段拼装施工技术的特点,制定了与之相适应的监控方案,在节段拼装施工过程中,通过对应变器采集数据的处理,得到节段拼装施工各施工阶段结构的实测值,通过理论值和实测值的分析与对比,查找偏差出现的原因,并进行纠偏,从而使模型与实际更为接近,以此指导全桥各阶段的施工并实现对拼装过程进行有效的控制。
[Abstract]:Bridge-erecting machine is a kind of large mechanical equipment which is assembled at the bridge and then constructed one by one. Prefabricated segmental assembly construction technology is the most common construction method in the construction of bridge erecting machine. The construction of segmental assembly requires several complicated processes, such as the assembling of beam section, the pouring of wet joint concrete, the prestressing tensioning, the dismounting of bridge erecting machine and the system conversion, and so on. The internal force and deformation of the beam are affected by various material factors, Therefore, the study of displacement and stress condition of bridge erector and simply supported beam under different construction conditions and the establishment of detailed construction control scheme not only relate to the safety of the bridge erector itself but also to the final bridge alignment. Based on the research background of the 48 m segment assembling simply supported box girder of Sanyangchuan Bridge on Baolan Line, the development and research status of the segmental assembling construction technology are described in detail in this paper. Then, taking the 48m section of Sanyangchuan Bridge on Baolan Line as an example, the paper introduces the main structure, construction principle and method of the main equipment TP48 segment erection bridge erector, and divides the construction process into the installation of the bridge erector. In the five construction stages of beam block hoisting, wet joint concrete pouring, prestressed tensioning and bridge erecting machine passing through the hole, the finite element software Midas Civil is used as the tool, through the reasonable simplification of the bridge erecting machine, The integral finite element model of bridge erector and concrete simply supported beam is established, and the simulation analysis of construction stage is carried out. The physical behavior of TP48 bridge erector and concrete beam is analyzed. The linear changes of the simply supported concrete beam in each construction stage and the stress of the key control section are obtained in the course of segmental assembly construction. The law of change in the whole construction process is also found out. Based on the guidance of the above theoretical data, according to the characteristics of the construction technology of the 48m section assembly of Sanyangchuan Bridge on Baolan Line, a suitable monitoring scheme is developed, which is used in the construction process of the section assembly. Through the processing of the data collected by the strainer, the measured values of the structures in each construction stage of the segmental assembling construction are obtained. Through the analysis and comparison of the theoretical values and the measured values, the causes of the deviation are found out, and the deviation is corrected. Thus, the model is closer to the reality, which can guide the construction of the whole bridge and realize the effective control of the assembling process.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4
本文编号：2159130
[Abstract]:Bridge-erecting machine is a kind of large mechanical equipment which is assembled at the bridge and then constructed one by one. Prefabricated segmental assembly construction technology is the most common construction method in the construction of bridge erecting machine. The construction of segmental assembly requires several complicated processes, such as the assembling of beam section, the pouring of wet joint concrete, the prestressing tensioning, the dismounting of bridge erecting machine and the system conversion, and so on. The internal force and deformation of the beam are affected by various material factors, Therefore, the study of displacement and stress condition of bridge erector and simply supported beam under different construction conditions and the establishment of detailed construction control scheme not only relate to the safety of the bridge erector itself but also to the final bridge alignment. Based on the research background of the 48 m segment assembling simply supported box girder of Sanyangchuan Bridge on Baolan Line, the development and research status of the segmental assembling construction technology are described in detail in this paper. Then, taking the 48m section of Sanyangchuan Bridge on Baolan Line as an example, the paper introduces the main structure, construction principle and method of the main equipment TP48 segment erection bridge erector, and divides the construction process into the installation of the bridge erector. In the five construction stages of beam block hoisting, wet joint concrete pouring, prestressed tensioning and bridge erecting machine passing through the hole, the finite element software Midas Civil is used as the tool, through the reasonable simplification of the bridge erecting machine, The integral finite element model of bridge erector and concrete simply supported beam is established, and the simulation analysis of construction stage is carried out. The physical behavior of TP48 bridge erector and concrete beam is analyzed. The linear changes of the simply supported concrete beam in each construction stage and the stress of the key control section are obtained in the course of segmental assembly construction. The law of change in the whole construction process is also found out. Based on the guidance of the above theoretical data, according to the characteristics of the construction technology of the 48m section assembly of Sanyangchuan Bridge on Baolan Line, a suitable monitoring scheme is developed, which is used in the construction process of the section assembly. Through the processing of the data collected by the strainer, the measured values of the structures in each construction stage of the segmental assembling construction are obtained. Through the analysis and comparison of the theoretical values and the measured values, the causes of the deviation are found out, and the deviation is corrected. Thus, the model is closer to the reality, which can guide the construction of the whole bridge and realize the effective control of the assembling process.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4
【参考文献】
相关期刊论文 前1条
1 邹琳斌;姜海波;危春根;殷武;杨敏;;节段施工混凝土箱梁接缝抗剪性能有限元分析[J];工业建筑;2011年11期
，本文编号：2159130
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