基于某明挖法湖底隧道工程的大体积混凝土温度裂缝研究
发布时间：2018-09-14 18:25
【摘要】：大体积混凝土温度裂缝的影响因素众多,各因素复杂多变而又相互牵连,且温度裂缝的出现对混凝土构件的安全性、耐久性产生一定程度的影响,后期补救费用往往高昂,致使大体积混凝土温度裂缝研究一直处于热门课题。本文结合某市某一湖底隧道的第四段实际工程以及有限元分析方法,对隧道工程大体积混凝土温度场与应力场进行相关的研究,其具体研究内容如下:1.通过参阅大量研究文献与资料,总结大体积混凝土温度裂缝在国内外的研究成果以及其防控技术的应用现状。2.通过对现场实测的温度数据进行整理与分析,总结在此标段环境下隧道混凝土在浇筑养护期的温度变化规律。3.根据对现场环境与施工过程信息的采集信息,对隧道工程大体积混凝土温度应力场进行有限元模拟,得到一个对相似工程有着参考意义的有限元分析模型。4.通过对得到的有限元模型进一步的分析,总结隧道混凝土的温度应力场分布以及变化规律,并依据分析结果,对隧道混凝土浇筑养护过程出现温度裂缝提出有效的防控措施和可行建议。
[Abstract]:There are many factors affecting the temperature crack of mass concrete, each factor is complicated and changeable, and the appearance of temperature crack has a certain degree of influence on the safety and durability of concrete members, and the cost of remediation in the later stage is often high. As a result, the research on temperature cracks of mass concrete has been a hot topic. In this paper, the temperature field and stress field of mass concrete in tunnel engineering are studied by combining with the practical engineering of the fourth section of a lake bottom tunnel in a certain city and the finite element analysis method. The concrete research contents are as follows: 1. By referring to a large number of research documents and materials, this paper summarizes the research results of mass concrete temperature cracks at home and abroad and the application status quo of its prevention and control technology. Through the consolidation and analysis of the field measured temperature data, this paper summarizes the temperature variation law of tunnel concrete during the pouring and curing period under the environment of this section. According to the information collected from the field environment and the construction process, the finite element simulation of the temperature stress field of mass concrete in tunnel engineering is carried out, and a finite element analysis model .4which has reference significance for similar engineering is obtained. Through the further analysis of the obtained finite element model, the distribution and variation law of the temperature stress field of the tunnel concrete are summarized, and based on the analysis results, This paper puts forward effective prevention and control measures and feasible suggestions for temperature cracks in the process of tunnel concrete pouring and curing.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U459.5;U455.4
本文编号：2243512
[Abstract]:There are many factors affecting the temperature crack of mass concrete, each factor is complicated and changeable, and the appearance of temperature crack has a certain degree of influence on the safety and durability of concrete members, and the cost of remediation in the later stage is often high. As a result, the research on temperature cracks of mass concrete has been a hot topic. In this paper, the temperature field and stress field of mass concrete in tunnel engineering are studied by combining with the practical engineering of the fourth section of a lake bottom tunnel in a certain city and the finite element analysis method. The concrete research contents are as follows: 1. By referring to a large number of research documents and materials, this paper summarizes the research results of mass concrete temperature cracks at home and abroad and the application status quo of its prevention and control technology. Through the consolidation and analysis of the field measured temperature data, this paper summarizes the temperature variation law of tunnel concrete during the pouring and curing period under the environment of this section. According to the information collected from the field environment and the construction process, the finite element simulation of the temperature stress field of mass concrete in tunnel engineering is carried out, and a finite element analysis model .4which has reference significance for similar engineering is obtained. Through the further analysis of the obtained finite element model, the distribution and variation law of the temperature stress field of the tunnel concrete are summarized, and based on the analysis results, This paper puts forward effective prevention and control measures and feasible suggestions for temperature cracks in the process of tunnel concrete pouring and curing.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U459.5;U455.4
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