桥梁施工监控及桥梁裂缝成因研究

发布时间：2018-03-18 19:33

本文选题：连续梁桥　切入点：施工监控　出处：《中南大学》2014年硕士论文　论文类型：学位论文

【摘要】：目前,高速铁路建设在国民经济正以飞快的速度发展,而桥梁体系在高速铁路中被大量采用,预应力混凝土连续梁桥也成为目前应用最为广泛的桥型之一。在高速铁路桥梁施工过程中,桥梁施工监控的重要性逐渐被重视。桥梁施工监控能保证桥梁成桥线形,使桥梁内力满足设计要求,并且还给桥梁预留长期观测点,为桥梁创造终身监测条件,给桥梁运行阶段的养护工作提供科学可靠的数据。本文系统介绍了桥梁施工监控的目的和方法,并以沪昆高速跨320国道立交特大桥为主要工程研究背景,通过桥梁博士有限元软件建模分析与计算和现场测量与调整,论证了该桥梁的监控效果,并说明了桥梁施工监控在桥梁施工过程中对桥梁线形控制的重要性。文章中还采用灰色系统理论对相关结果进行预测和对相关缺失数据进行估算,在前人的基础上进一步论证灰色理论在桥梁施工监控中的可行性。文章最后还针对该桥梁0#块出现的裂缝,从扭转应力、水泥水化热、外界气温骤变以及日照温差影响四个方面进行分析,运用ANSYS有限元软件建立仿真模型,对各种因素进行比较,分析该裂缝出现的原因,并总结了0#块开裂预防措施。
[Abstract]:At present, the construction of high-speed railway is developing rapidly in the national economy, and the bridge system is widely used in high-speed railway. Prestressed concrete continuous beam bridge has become one of the most widely used bridges at present. In the construction process of high-speed railway bridge, the importance of bridge construction monitoring is paid more and more attention. The internal force of the bridge can meet the design requirements, and the long-term observation points are reserved for the bridge, which will create the monitoring conditions for the bridge for life, and provide scientific and reliable data for the maintenance of the bridge in the operation stage. The purpose and method of bridge construction monitoring are systematically introduced in this paper. Taking the Hu-Kun Expressway 320 National Highway Interchange Bridge as the main engineering research background, the bridge is modeled, analyzed and calculated by the finite element software, and the field measurement and adjustment are carried out. The monitoring effect of the bridge is demonstrated, and the importance of the bridge construction monitoring to the bridge alignment control during the bridge construction is explained. The grey system theory is also used to predict the relevant results and to estimate the missing data. The feasibility of grey theory in bridge construction monitoring is further demonstrated on the basis of predecessors. Finally, according to the cracks in the block of the bridge 0#, from the torsional stress, cement hydration heat, The sudden change of outside temperature and the influence of sunshine temperature difference were analyzed. The simulation model was established by using ANSYS finite element software, the factors were compared, the reason of the crack appeared was analyzed, and the preventive measures of the crack in the block of 0# were summarized.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4

【参考文献】