【作者】 刘勇；

【导师】 付厚利；

【作者基本信息】 山东科技大学 ， 岩土工程， 2006， 硕士

【摘要】 本文采用数值模拟计算和理论分析相结合的方法，以深土冻结法施工温度场相关知识为基础，结合参数辨识的方法，对深土冻结温度场的分布进行了ANSYS有限元数值模拟，通过反分析对其等效平均导热系数进行了研究和探讨。文中分析了冻结法施工的应用条件，目前对冻结法施工的研究现状和在此领域内存在的问题，指出了对深土冻结温度场进行深入研究分析的必要性；对影响冻结壁形成发展的因素如冻土土性、含水量、地质条件及施工方法等因素进行了论述；对冻结法施工的原理、过程，冻结法温度场的分布情况，影响冻结温度场分布的主要热学参数进行了综述；对深土冻土温度场模型进行了合理的简化，通过ANSYS大型有限元分析软件，建立了深土冻结温度场的模型，对不同导热系数情况下的深土冻结温度场进行了模拟；对ANSYS的模拟结果进行了定性的分析，通过对ANSYS结果的后处理取得了反分析时需要用到的测温孔理论温度值；经过对测温孔模拟温度值和实测温度值的分析，得到了冻结温度场的等效导热系数；使用等效导热系数对深土冻结温度场进行了求解，模拟了冻结壁发展情况和温度场中的温度变化曲线，用所得结果对比工程实际情况，取得了较好的效果。更多还原

【Abstract】 This article associates the numerical simulation and theoretical analysis, based on the related knowledge of temperature field of deep earth freezing method, combined with parameter identification methods, simulates the deep freezing temperature field by ANSYS finite elements and researches its equivalent average heat conductivity by back-analysis. This article analyses the application conditions of freezing method, current research status and the problems in this (?)iold. It, points that it’ s necessary to study deep freezing temperature field deeply and discusses the factors which influence the freezing wall such as soil’ s nature, moisture content, geological conditions, etc. It introduces the theory, process of freezing method, the distribution of temperature field of freezing method and key thermotics parameters influencing freezing temperature field, it simplifies the deep freezing temperature field model. Through ANSYS, this article founds the deep freezing temperature field model, and simulates the field on vary heat conductivities. It analyzes the results of ANSYS simulation, gains the theoretical value of thermometric holes which is needed by back analysis. Using the simulation temperature and actual value, it gets the equivalent heat conductivity. Then it solves the deep freezing temperature field by the equivalent value, simulates the freezing wall development process and temperature change curve. Against the actual project, the results are favorable.更多还原