铁路连续梁桥悬臂施工挂篮设计及优化详解.docx
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兰州交通大学毕业设计(论文)
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摘要
本文以黄韩侯铁路HHZQ-2标段的金水沟特大桥预应力混凝土箱梁的悬臂浇筑施工为工程背景,主要论述了斜拉式挂篮的设计。本桥主跨最重梁段236.25t,为4#梁段,对挂篮的要求为自重不能超过140t。本设计的主要内容以相关规范和文献为依据,对斜拉式挂篮的构件进行材料、尺寸、构造的设计。
首先根据实际的工程背景进行方案比选,并提出挂篮方案;然后,拟定挂篮总体及细部结构的初步尺寸;最后,应用Midas软件进行辅助分析,并对斜拉式挂篮承重系统的主梁、上横梁和下横梁,走形系统的侧梁和吊杆,限位系统的上限位器和下限位器,锚固系统的锚栓和锚杆以及模板系统的侧模、内模、底模和端模等,在各种荷载组合下的强度、刚度、整体稳定性等进行手工验算。在验算结果满足规范要求以后,对挂篮的不足之处进行优化设计,以保证挂篮更能适用于实际工程。最后绘制斜拉式篮的总体布置图和细部结构图。
关键词:斜拉式挂篮;悬臂浇筑;承重系统;结构验算
Abstract
In this paper, the railway of Huang Han Hou HHZQ-2 tenders Jin shui gou bridge prestressed concrete box beam cantilever construction engineering was treated as the only background of the whole article, and it mainly discussed the design of cable-stayed hanging basket. The main span of the bridge girder segment was 236.25t, it was the segment of 4 # beam, and the requirements for hanging basket weight could not exceed 140t. The design of the main contents was the key to the relevant standards and documents in order to design materials, dimensions, construction for cable-stayed Cradle components.
First, according to the actual background of engineering, made a clear distinction , and proposed a program of Cradle; then, prepared the overall and detailed of Cradle about the structure of the initial size; finally, used the application of Midas to aid to help analyzing the software, and cable-stayed cradle main load-bearing system beam, upper beam and a lower beam, side beam out of shape and boom system, limit the system’s upper part and a lower part , anchored the anchored system and the side mold, the inner mold, bottom mold and end mold of template system and so on. Under the various load combinations strength, stiffness, overall stability for manual checking, it could be calculated by hangs. After the results of checking met regulatory requirements in the future, we could make an advanced design on the inadequacies of the cradle to optimize to ensure that the hanging basket can suit for the actual project, At last,
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