矮塔斜拉桥菱形挂篮系统结构改进及其施工关键技术研究

发布时间：2018-03-07 00:18

本文选题：矮塔斜拉桥　切入点：菱形挂篮　出处：《江苏科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着科技的进步,路桥建设规模不断在扩大。矮塔斜拉桥凭借其自身在经济上优越性的特点发展迅速。从20世纪60年代开始,慢慢的普及到世界各地。而矮塔斜拉桥主梁悬臂施工至关重要,决定着整个桥梁的质量和安全。悬臂施工分为悬臂浇筑法与悬臂拼装法,现在大多采用悬臂浇筑法施工。悬臂浇筑法是用挂篮就地分段现浇,待此段混凝土养护并张拉预应力后,再将挂篮前移,用来浇筑下一块段。本论文围绕着新洋港大桥的施工设备菱形挂篮进行改进研究,以及对改进后菱形挂篮的施工关键技术进行说明。因为工期短、原材料供应不足以及资金紧缺,施工单位决定采用原东宝河大桥的菱形挂篮来施工。因新洋港大桥主梁宽,重量大,为了使得原菱形挂篮满足新洋港大桥的需要,需要对其结构进行改进。合格后,将改进后的菱形挂篮运用到主梁施工上。本文首先介绍了新洋港大桥的工程概况,对整个工程的施工方案进行了精心的设计。在此基础上,找出两个代表性的箱梁块段,利用有限元分析和详细计算两种方法对原菱形挂篮系统进行应力和位移分析,根据两种分析的结果,表明原菱形挂篮系统不能满足新洋港大桥主梁施工的要求。因此,为了确保菱形挂篮经济和安全施工,找出原挂篮的不足之处,对其进行相应的改进设计,提高菱形挂篮结构的强度、刚度和稳定性。并且对改进后的菱形挂篮进行校核,证明其可以用来施工。为新洋港大桥主梁的顺利施工提供了有效的技术保障和参考依据。通过全面、细致的分析研究及精心实施,本工程实现了技术先进、经济合理、施工简易的目标,所取得的成果可为同类工程菱形挂篮的设计和施工提供有益的借鉴。
[Abstract]:With the progress of science and technology, the scale of road and bridge construction has been expanding. The low tower cable-stayed bridge has developed rapidly by virtue of its own economic superiority. Since 1960s, The cantilever construction of the main girder of the low tower cable-stayed bridge is very important, which determines the quality and safety of the whole bridge. The cantilever construction is divided into cantilever pouring method and cantilever assembly method. Most of the present construction methods are cantilever pouring. The cantilever pouring method is to use the hanging basket in situ to pour in situ. After this section of concrete is maintained and prestressing, the hanging basket will be moved forward. This paper focuses on the improvement of the diamond hanging basket of the construction equipment of Xinyang Port Bridge, and explains the key construction technology of the improved diamond hanging basket because of the short construction period. Due to the shortage of raw materials and the shortage of funds, the construction unit decided to use the diamond hanging basket of the original Dongbao River Bridge to construct the bridge. Because the main girder of the Xinyang Port Bridge is wide and heavy, in order to make the original diamond hanging basket meet the needs of the Xinyang Port Bridge, It is necessary to improve its structure. After qualified, the improved diamond hanging basket is applied to the construction of the main beam. This paper first introduces the general situation of the project of Xinyang Port Bridge, and designs the construction scheme of the whole project meticulously. Two representative blocks of box girder are found, and the stress and displacement of the original diamond hanging basket system are analyzed by finite element analysis and detailed calculation, according to the results of the two kinds of analysis. It shows that the original diamond hanging basket system can not meet the requirements of the construction of the main girder of the Xinyang Port Bridge. Therefore, in order to ensure the economic and safe construction of the diamond hanging basket, the deficiencies of the original hanging basket are found out, and the corresponding improvement design is carried out. To improve the strength, stiffness and stability of the diamond hanging basket structure, and to check the improved diamond hanging basket, It is proved that it can be used for construction. It provides effective technical guarantee and reference basis for the smooth construction of the main girder of Xinyang Port Bridge. Through comprehensive, detailed analysis and study and careful implementation, the project has achieved advanced technology and reasonable economy. The simple target of construction and the results obtained can provide useful reference for the design and construction of rhombic hanging baskets in similar projects.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U445.4

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