小清河连续刚构桥施工控制的实施与分析

发布时间：2018-07-02 15:03

本文选题：连续刚构桥 + 施工控制　；参考：《山东大学》2015年硕士论文

【摘要】：现代交通运输业发展迅速,为满足人们出行方便和节约时间,许多高铁项目和高速公路项目应运而生。但这些项目不可避免会遇到一些河流及复杂地形需要跨越,大量特殊的桥梁则需要建设。连续刚构桥以其强度高、结构整体受力性能好、施工迅速、抗震性能好等优点备受青睐。挂篮悬臂施工具有自重较轻、前移和装拆方便、受力变形较小等优势,广泛应用于连续刚构桥中。但连续刚构桥的悬臂施工中影响因素和不确定因素很多,并且现场施工条件也比较繁杂,很容易出现实际成桥状态与理论设计状态存在偏差的情况。综上所述,桥梁中施工控制的实施是非常有必要的。本文首先描述了连续刚构桥的发展历程、施工特点、施工方法以及发展趋势,又综合介绍了连续刚构桥施工控制的发展、意义、内容以及存在的影响因素。并且通过对连续刚构桥结构计算方法的引入,为连续刚构桥施工控制在实际工程中的应用奠定了理论基础。本文随后以小清河连续刚构桥的实际工程为研究背景,以连续刚构桥的高程控制以及应力和温度监测为研究目的,介绍了施工控制在小清河连续刚构桥实际工程中的具体应用。并且在小清河连续刚构桥的现场施工之前,通过桥梁设计和分析软件MIDAS/Civil建立有限元仿真计算模型,为桥梁实际施工控制提供了有力的理论依据。本文在实际施工中分析了施工条件、模型参数、挂篮变形等影响因素,考虑到施工中存在非线性因素及现场复杂环境的综合影响,使用了前进分析法对立模标高进行动态控制,通过对修正误差的引入,确保高程偏差控制在合理的范围内。并且实时对桥梁内部应力进行监测,确保施工安全。最后,本文比较了小清河连续刚构桥的理论设计值和实际成桥值,可以看出MIDAS/Civil计算模型较为准确,利用前进分析法对高程控制效果良好,桥梁内部应力满足相应要求,整体桥梁施工控制较为成功,可具有参考及应用价值。
[Abstract]:With the rapid development of modern transportation, many high-speed rail projects and highway projects emerge as the times require in order to meet the convenience of travel and save time. But these projects will inevitably encounter some rivers and complex terrain to cross, a large number of special bridges need to be built. Continuous rigid frame bridge is favored for its high strength, good overall mechanical performance, rapid construction and good seismic performance. The cantilever construction with hanging basket is widely used in continuous rigid frame bridge because of its advantages of light weight, convenient to move forward and install and disassemble, and less deformation. However, there are many influencing factors and uncertain factors in cantilever construction of continuous rigid frame bridge, and the site construction conditions are complicated, so it is easy to appear the deviation between the actual bridge state and the theoretical design state. To sum up, the implementation of bridge construction control is very necessary. This paper first describes the development course, construction characteristics, construction method and development trend of continuous rigid frame bridge, and introduces the development, significance, content and influence factors of construction control of continuous rigid frame bridge. By introducing the calculation method of continuous rigid frame bridge structure, the theoretical foundation of construction control of continuous rigid frame bridge in practical engineering is established. Taking the practical engineering of Xiaoqing River continuous rigid frame bridge as the research background, and taking the elevation control and stress and temperature monitoring of the continuous rigid frame bridge as the research purposes, this paper introduces the concrete application of the construction control in the practical engineering of the Xiaoqing River continuous rigid frame bridge. Before the construction of the continuous rigid frame bridge in Xiaoqing River, the finite element simulation model is established through the bridge design and analysis software Midas / Civil, which provides a powerful theoretical basis for the actual construction control of the bridge. In this paper, the construction conditions, model parameters, hanging basket deformation and other influencing factors are analyzed in actual construction. Considering the comprehensive influence of nonlinear factors in construction and the complex environment on the spot, the forward analysis method is used to dynamically control the elevation of the model. The correction error is introduced to ensure that the height deviation is controlled within a reasonable range. The internal stress of the bridge is monitored in real time to ensure the safety of construction. Finally, this paper compares the theoretical design value with the actual bridge value of Xiaoqing River continuous rigid frame bridge. It can be seen that Midas / Civil calculation model is more accurate, using the forward analysis method to control the elevation is good, and the internal stress of the bridge meets the corresponding requirements. The whole bridge construction control is more successful, can have the reference and the application value.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4;U448.23

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