简支钢箱梁分块拼装施工工艺及荷载试验成果研究

发布时间：2018-03-26 14:13

本文选题：钢箱梁　切入点：现场吊装　出处：《重庆交通大学》2014年硕士论文

【摘要】：近年来,大跨径的斜拉和悬索桥建设飞速发展,在这些桥梁的建设中钢箱梁被广泛利用,钢箱梁的结构纤细美观,同时便于工厂预制,现场焊接、拼装,可以有效地缩短工期,节约成本；另外,通过搭设临时支架,对附近的其他交通影响较小,它的这些优势不断在实际的工程建设中被人们所认同。我国在钢箱梁的近期探索中,也总结了大量的经验。论文依据唐家咀大桥为施工背景,着重介绍了钢箱梁在近期交通建设中的优势,工程中钢箱梁采用分段、分块在工厂预制的思维,然后在现场进行吊装,焊接连接。同时为确保下穿成南高速的正常运营,先对高速路面进行拓宽,再搭设临时支架,并验算支架的相关承载能力,在临时支架上进行钢箱梁的施工操作,确保施工期间公路的安全运行。为明确本工程中钢箱梁的实际受力情况,采用有限元分析软件,通过建模计算,分析梁体的各项受力性能以及变形情况,并对结果进行分析,查看是否满足相应要求,以保证工程质量。同时在工程完成后,及时进行桥梁静动载试验,通过测量桥梁在规范中规定的相应动载作用下的应力应变和挠曲变形结果,分析桥梁建设目标的完成情况,并对其作出评价。钢箱梁作为近代桥梁建设中的主要梁体结构,其各项技术优势不断被人们发掘,为桥梁事业的发展开辟了新的发展空间,它的出现让桥梁的建设更靠近了“安全、经济、使用、美观”的目标,我们作为未来桥梁事业的主力军,我们应该充分认识到钢箱梁的各项优势,并牢牢掌握,敢于开拓创新,去创造桥梁建设的新成就。
[Abstract]:In recent years, the construction of long span cable-stayed and suspension bridges has developed rapidly. In the construction of these bridges, steel box girders are widely used, the structure of steel box girders is fine and beautiful, and at the same time, it is convenient for factories to prefabricate, weld and assemble in situ, which can effectively shorten the construction period. Cost savings; in addition, by erecting temporary support, the impact on other traffic nearby is relatively small, and these advantages have been recognized by people in actual engineering construction. In our country's recent exploration of steel box girders, Based on the construction background of Tangjiazui Bridge, the paper emphatically introduces the advantages of steel box girder in the recent traffic construction. In the project, the steel box girder is divided into sections, prefabricated in the factory, and then hoisted on the spot. Welding connection. At the same time, in order to ensure the normal operation of South Expressway, first widen the high speed pavement, then set up temporary support, and check the bearing capacity of the support, carry out the construction operation of the steel box girder on the temporary support, To ensure the safe operation of the highway during the construction period, in order to make clear the actual force situation of the steel box girder in this project, the finite element analysis software is used to analyze the mechanical behavior and deformation of the beam body through modeling and calculation, and the results are analyzed. At the same time, after the completion of the project, the static and dynamic load test of the bridge is carried out in time, and the results of stress, strain and deflection of the bridge under the corresponding dynamic load as specified in the code are measured. As the main girder structure in modern bridge construction, the technical advantages of steel box girder have been continuously explored by people, which has opened up a new development space for the development of bridge. Its appearance makes the bridge construction closer to the goal of "safety, economy, use, beauty". As the main force of the bridge cause in the future, we should fully recognize the advantages of steel box girder, grasp firmly and dare to open up and innovate. To create new achievements in bridge construction.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4

【相似文献】