超高大矢跨比钢拱桥吊装工艺研究

发布时间：2018-07-04 10:18

本文选题：钢箱拱 + 整体吊装法　；参考：《江苏科技大学》2014年硕士论文

【摘要】：近年来，钢拱桥由于自重轻，水平推力相对较小，结构形式多样，被广泛应用于桥梁建设当中，成为发展大跨径、轻结构的理想桥型。但随着施工地点的改变，施工条件也不一样。西北地区由于地处寒旱区，其昼夜温差大，风速高，因此给桥梁建设带来了难题。且该地区由于种种原因也始终没有开展过类似大跨度桥梁工程的建设。因此研究寒旱区拱桥施工，确保桥梁施工质量及结构安全，提供相应的施工方法与建议是十分必要的。钢拱桥的施工方法主要有支架施工法、悬臂施工法、转体施工法、缆索施工法以及整体吊装法。前述施工方法拱肋在空中的施工周期都较长，而西北地区的高风速对于长时间处于高空中未就位拱肋的受力是不利的。本文主要研究整体吊装法对于该地区拱肋吊装的实际应用。本课题的研究是以内蒙古伊克昭盟大桥为背景，通过对整体起吊的吊塔高度以及吊点数量、吊点位置的比选工作，以确保拱肋在起吊过程中有一个比较理想的变形与受力；对拱肋局部进行补强验算，，对拱肋局部应力集中的部位提供相应的补强措施；对拱肋的整体起吊翻转过程进行一个整体的稳定性计算，验算拱肋在起吊翻转过程中的稳定性能否满足规范要求。本文的研究丰富了我国寒旱区钢箱提篮拱桥施工方法的依据，将为我国同类地区的桥梁施工起吊增添新的经验，本课题的分析研究还具有一定的理论与实用价值，将为拱肋整体起吊的施工方法在全国推广与发展起到推动作用。
[Abstract]:In recent years, steel arch bridge has been widely used in bridge construction because of its light weight, relatively small horizontal thrust and diversified structure. It has become an ideal bridge type for developing long span and light structure. But with the change of construction site, construction conditions are also different. The northwest region is located in the cold and dry area, its diurnal temperature difference is big, the wind speed is high, therefore brings the difficult problem to the bridge construction. Because of various reasons, similar long-span bridge construction has never been carried out in this area. Therefore, it is necessary to study the construction of arch bridge in cold and dry area, to ensure the construction quality and structure safety of the bridge and to provide corresponding construction methods and suggestions. The construction methods of steel arch bridge include support construction, cantilever construction, rotary construction, cable construction and integral hoisting. The construction period of arch rib in the above mentioned construction method is long, but the high wind speed in northwest area is unfavorable to the force of the arch rib in the high altitude for a long time. This paper mainly studies the practical application of integral hoisting method to arch rib hoisting in this area. The research of this subject is based on the Ike Zhaomeng Bridge in Inner Mongolia, by comparing the height of the lifting tower, the number of the lifting points and the position of the lifting point, to ensure that the arch rib has an ideal deformation and force in the process of lifting. The reinforcement check calculation is carried out on the local arch rib, and the corresponding reinforcement measures are provided for the local stress concentration of the arch rib, and the overall stability calculation is carried out for the whole lifting and flipping process of the arch rib. Check whether the stability of arch rib in the process of lifting and turning can meet the requirements of the specification. The research in this paper enriches the foundation of construction method of steel box hoist arch bridge in cold and arid area of China, and will add new experience to the bridge construction and hoisting in the same area of our country. The analysis and research of this subject also has certain theoretical and practical value. The construction method of hoisting for arch rib will be popularized and developed in the whole country.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.22;U445.4

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