贵州红果跨铁路钢拱桥顶推施工仿真分析及关键技术研究

发布时间：2018-06-01 20:52

本文选题：顶推施工 + 导梁　；参考：《云南大学》2015年硕士论文

【摘要】：本文研究的贵州省红果经济开发区上跨铁路立交桥跨越既有水红铁路6股线路,采用大跨度桥梁设计。由于该桥跨度大、施工复杂顶推重量重,施工过程中存在多次体系转换,顶推阶段梁体的应力变化幅度大,在整个施工过程中,桥梁将受到许多确定和不确定因素的影响,同时,在铁路营业线上方施工安全风险较大。所以对其中的关键的技术参数等等进行研究和分析,结合现场测量的各种实际的参数,对顶推施工的方案、方法进行分析和研究,进而指导顶推施工以及控制。另一方面,设计人员对施工中所用的临时结构往往没有同主体桥梁一同设计计算,施工单位可以对设计的临时结构进行安全性复核和经济性优化。本文利用有限元软件MIDAS/Civil进行分析,主要包括以下两个方面：(1)利用有限元软件对钢拱桥的顶推施工进行仿真模拟分析,找出关键构件、关键截面和关键位置,并计算复核其位移、变形及应力。利用仿真计算的数据和现场监测的施工数据进行比较分析,通过对结果的比对和分析,对施工方案的进行了评估。(2)对钢拱桥临时的导梁结构进行安全性复核和经济性优化。本课题研究的目的一方面是复核施工阶段各工况的安全性,另一份面对临时结构设施进行优化,提高经济性。
[Abstract]:In this paper, six strands of existing Shuihong Railway are crossed over the cross-railway overpass in Hongguo Economic Development Zone of Guizhou Province, and the design of large-span bridge is adopted. Because of the large span of the bridge, the heavy weight of complex jacking and pushing, the multiple system transformation in the construction process, and the large range of stress variation of the beam in the jacking stage, the bridge will be affected by many deterministic and uncertain factors during the whole construction process. At the same time, the construction safety risk is high above the railway business line. So the key technical parameters and so on are studied and analyzed, and combined with various actual parameters measured on the spot, the scheme and method of jacking construction are analyzed and studied, and then the thrust construction and control are guided. On the other hand, designers often do not design and calculate the temporary structures used in construction together with the main bridge, and the construction units can carry out safety review and economic optimization of the designed temporary structures. In this paper, the finite element software MIDAS/Civil is used to analyze, which mainly includes the following two aspects: 1) using the finite element software to simulate and analyze the jacking construction of steel arch bridge, to find out the key components, key sections and key positions, and to calculate and check the displacement of the steel arch bridge. Deformation and stress. Through the comparison and analysis of the results and the evaluation of the construction scheme, the safety review and economic optimization of the temporary guide beam structure of the steel arch bridge are carried out. The purpose of this research is to check the safety of each working condition in the construction stage on the one hand, and to optimize the temporary structure and facilities to improve the economy in the other.
【学位授予单位】：云南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.462

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