地铁隧道联络通道三维冻结温度场和地层冻胀特征数值分析

发布时间：2018-04-14 00:30

本文选题：人工冻结法 + 方案设计　；参考：《安徽理工大学》2015年硕士论文

【摘要】：自人工冻结辅助施工法在土木工程中开始应用以来,土体的冻胀位移与温度场分布问题一直是冻结工程中最为关键的问题。土体冻胀直接关系到实际工程的安全和成败,而温度场的研究结果则为冻结工程的设计与应用提供了最为重要的基础。本文以上海某地铁隧道为背景,对该工程的联络通道进行人工冻结辅助施工法设计,并简单叙述其施工方法与工艺；采用有限元软件对此工程冻结时的土体温度场进行三维数值模拟,得出土体冻结时的温度场的分布规律与数值大小；利用顺序耦合对土体位移场进行三维数值模拟,得出土体位移场的分布情况；最后利用现场测得的数据与数值模拟结果进行对比,评价模拟效果。结果表明实际情况与模拟相符合,验证了该方法的可行性。通过对冻结方案及土体冻胀位移场、温度场的分析研究,为今后同类工程的设计与施工提供了依据,具有现实指导意义。
[Abstract]:Since the application of artificial freezing auxiliary construction method in civil engineering, the distribution of soil frost heave displacement and temperature field has been the most critical problem in freezing engineering.The frost heave of soil is directly related to the safety and success of the actual engineering, and the research results of the temperature field provide the most important foundation for the design and application of the freezing engineering.Taking a subway tunnel in Shanghai as the background, this paper carries out the artificial freezing auxiliary construction method design for the contact passage of the project, and simply describes its construction method and technology.The temperature field of soil is simulated by finite element software, and the distribution law and numerical value of soil temperature field are obtained, and the displacement field of soil is simulated by sequential coupling.The distribution of soil displacement field is obtained, and the simulation effect is evaluated by comparing the measured data with the numerical simulation results.The results show that the actual situation is consistent with the simulation, and the feasibility of the method is verified.Through the analysis of freezing scheme, frost heaving displacement field and temperature field of soil, this paper provides the basis for the design and construction of similar projects in the future, and has practical guiding significance.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.49;U231.3

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