悬臂浇筑法施工监控研究及其相关因素分析

发布时间：2018-03-24 15:45

本文选题：悬臂浇筑法　切入点：施工监控　出处：《合肥工业大学》2015年硕士论文

【摘要】：桥梁工程在国内外已发展多年,桥梁建设技术越趋于成熟。各类桥梁以及各种桥型都有不同的施工方法,每一种施工方法都有其自身的特点并且适用于不同的情况。由于当今的桥梁越来越追求跨度大、成本低、质量高,所以连续梁桥或者连续钢构桥等在国内运用的非常广泛。悬臂浇筑法就是在这些桥梁施工中发展起来的,这种施工方法具有不需要搭设支架、多孔桥跨同时施工、挂篮可以重复使用等优点。但是悬臂浇筑法也有其自身的缺点,比如施工步骤较多、结构参数较难控制等。桥梁施工技术的发展也提高了对桥梁建设的安全要求和质量要求,桥梁的施工监控就是为了解决这一问题。本文系统的提出了悬臂浇筑法施工监控的理论方法,并且详细的说明了监控过程中具体步骤的实现。依托工程实例,把监控理论知识运用于实际工程中,成功的完成了一座连续梁桥的监控分析。针对监控的分析过程,指出了温度对监控在位移及应力的影响并且提出了一些解决办法。另外,由于在桥梁施工过程中一些相关因素的影响会造成参数的误差,比如混凝土收缩徐变、预应力误差、挂篮刚度不确定性等。对这些参数的影响,引用了两种参数识别方法进行处理,它们分别是kalman滤波法和灰色理论。本文主要通过运用灰色理论的求解方法部分消除了这些误差的影响,使监控的过程尽量的符合实际。本文完整的运用了现有的桥梁监控方法对桥梁进行了监测,对桥梁结构进行有限元建模,划分施工阶段,把复杂的施工步骤简单化。从整个施工监控的高度识别有可能存在的误差并且加以解决,完善和补充了当前桥梁监控技术的不足。
[Abstract]:Bridge engineering has been developed for many years at home and abroad, and the technology of bridge construction is becoming more and more mature. All kinds of bridges and all kinds of bridge types have different construction methods. Each construction method has its own characteristics and is suitable for different situations. Therefore, continuous beam bridges or continuous steel bridges are widely used in China. Cantilever casting method is developed in these bridges construction, this construction method has no need to build support, porous bridge span construction at the same time, The hanging basket can be used repeatedly, but the cantilever casting method also has its own disadvantages, such as more construction steps, more difficult to control structural parameters, etc. The development of bridge construction technology also improves the safety requirements and quality requirements for bridge construction. In order to solve this problem, this paper systematically puts forward the theory and method of cantilever pouring construction monitoring, and explains in detail the realization of concrete steps in the monitoring process. The monitoring theory is applied to the practical engineering, and the monitoring analysis of a continuous beam bridge is successfully completed. In view of the monitoring analysis process, the influence of temperature on the displacement and stress of monitoring is pointed out and some solutions are put forward. Because of the influence of some related factors in the process of bridge construction, such as shrinkage and creep of concrete, prestress error, uncertainty of hanging basket stiffness and so on. Two kinds of parameter identification methods are introduced to process them, they are kalman filtering method and grey theory. In this paper, the influence of these errors is partly eliminated by using the method of solving grey theory. Make the monitoring process as far as possible in line with the reality. This paper uses the existing bridge monitoring methods to monitor the bridge, the bridge structure is modeled by finite element method, the construction phase is divided. The complicated construction steps are simplified, the possible errors are identified from the height of the whole construction monitoring and solved, and the deficiencies of the current bridge monitoring technology are perfected and supplemented.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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