带吊梁的MSS55移动模架的施工技术研究

发布时间：2018-10-09 07:54

【摘要】：近年来,移动模架法因具有工序程序化、施工周期短、线形易于控制、适用范围广和施工交通影响小等优点,在众多桥梁施工方法中脱颖而出。但55m及其以上跨径的移动模架的施工技术研究尚不深入。本文以洞庭湖大桥滩地引桥13标段带吊梁的MSS55移动模架造桥机机械为研究对象,在总结已有成果与研究存在的问题的基础上,根据带吊梁的MSS55型移动模架在实际施工中的经验,对其施工技术进行了比较详细的分析和研究,取得了若干有价值的结论:1、运用有限元程序MIDAS FEA对带吊梁的MSS55型移动模架结构进行了理论计算,研究了该移动模架整体安全性和稳定性;运用FBR_CAL_SUO对移动模架施工的连续梁全过程进行模拟,得到了施工过程中关键工况的挠度和应力的理论值;2、编制试验方案并进行了预压试验,采集了现场预压试验关键控制截面的应力和挠度数据,分析得到模架在承受不同试验荷载的变形和应力变化规律。对预压实验测试数据和运用FBR_CAL_SUO得到的理论计算数据进行对比,验证移动模架的安全性;3、用移动模架施工连续梁的浇筑、张拉预应力和落模三个关键控制工况各监测截面的挠度实测值和基于FBR_CAL_SUO软件得到的理论计算值进行对比分析,修正结构参数,进行修正后的全过程分析得到合理的预拱度;4、研究移动模架法的特点,提出带吊梁的MSS55型移动模架施工的各项安全保证措施,以表格的形式给出了日常检查维护的详细要求,为其日常使用养护与维修、正常安全施工提供依据。
[Abstract]:In recent years, because of the advantages of procedure, short construction period, easy control of linear shape, wide application range and small traffic impact, the moving mould frame method stands out among many bridge construction methods. However, the construction technology of moving die frame with span of 55 m and above is not well studied. In this paper, the MSS55 moving mould construction machine with suspended beam in the 13th section of the beachway approach bridge of Dongting Lake Bridge is taken as the research object. On the basis of summing up the existing achievements and the existing problems, according to the practical construction experience of the MSS55 type moving mould frame with suspension beam, The construction technology is analyzed and studied in detail, and some valuable conclusions are obtained. The finite element program MIDAS FEA is used to calculate the structure of MSS55 type moving die frame with suspension beam. The whole safety and stability of the movable die frame are studied, and the whole process of continuous beam construction is simulated by FBR_CAL_SUO. The theoretical values of deflection and stress in key working conditions are obtained, the test scheme is compiled and preloading test is carried out, and the stress and deflection data of key control section of field preloading test are collected. The deformation and stress variation of the die frame under different test loads are obtained. By comparing the test data of preloading experiment with the theoretical calculation data obtained by FBR_CAL_SUO, the safety of the movable die frame is verified and the continuous beam is built with the moving die frame. The deflection measured values of each monitoring section under three key control conditions of tensioning prestress and falling formwork are compared and analyzed with the theoretical calculated values based on FBR_CAL_SUO software, and the structural parameters are corrected. A reasonable pre-arch is obtained by analyzing the whole process of the modification. The characteristics of the moving die frame method are studied, and the safety assurance measures for the construction of the MSS55 type movable die frame with suspended beam are put forward, and the detailed requirements for routine inspection and maintenance are given in the form of a table. For its daily use, maintenance and maintenance, normal safety construction to provide the basis.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.463

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