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考虑地下水渗流影响的隧道人工冻结法数值模拟研究

摘要第4-5页
Abstract第5-6页
Chapter 1 Introduction第10-16页
    1.1 The research background and significance第10-11页
    1.2 Artificial Ground Freezing第11-13页
        1.2.1 Types of artificial ground freezing第12-13页
    1.3 Potential problems第13-14页
    1.4 Organization of Thesis第14-16页
Chapter 2 Literature review第16-33页
    2.1 General第16页
    2.2 Analysis methods of artificial ground freezing第16-20页
        2.2.1 Empirical methods第16-17页
        2.2.2 Analytical solutions第17-19页
        2.2.3 Numerical analyses methods第19-20页
    2.3 Design principle of Ground Freezing第20页
    2.4 Thermal Analysis for Design of artificial ground freezing第20-23页
        2.4.1 Initial ground temperature第21页
        2.4.2 Thermal Conductivity第21-22页
        2.4.3 Specific Heat第22页
        2.4.4 Freezing coolant temperature第22-23页
        2.4.5 Radius of freeze tubes第23页
    2.5 Structural analysis for the design of artificial ground freezing第23-26页
        2.5.1 Geometry第24-25页
        2.5.2 Soil conditions第25页
        2.5.3 Groundwater flow第25-26页
        2.5.4 Groundwater contaminants第26页
    2.6 Mechanical behavior of frozen soil第26-27页
    2.7 Water content behavior第27-28页
    2.8 Ground freezing Failures第28-31页
        2.8.1 Structural Considerations第28-29页
        2.8.2 Groundwater Considerations第29页
        2.8.3 Ground water velocity considerations第29-30页
        2.8.4 Ground movement considerations第30页
        2.8.5 Construction considerations第30-31页
    2.9 Temperature measurements in ground freezing第31-32页
        2.9.1 Temperature sensors for soil第31页
        2.9.2 Temperature sensors for cooling liquid第31-32页
        2.9.3 Gradient probes第32页
    2.10 Brief Summary第32-33页
Chapter 3 Numerical study of artificial ground freezing in tunneling subjected to seepage flow第33-55页
    3.1 Introduction第33页
    3.2 Research plan第33-34页
    3.3 Model Setup第34-35页
    3.4 Computational models第35页
    3.5 Finite Element Modeling第35-37页
        3.5.1 Ground modeling第35-36页
        3.5.2 Freezing pipes Modeling第36-37页
    3.6 Governing Equations第37-39页
        3.6.1 Brinkman equation第37-38页
        3.6.2 Heat transfer in a porous medium第38-39页
    3.7 Initial and Boundary conditions第39页
    3.8 Seepage flow第39-40页
    3.9 Mesh and Elements types第40-41页
    3.10 Simulation Results第41-51页
        3.10.1 Temperature distribution in the absence of seepage flow第41-43页
        3.10.2 Temperature distribution at seepage velocity of 0.5 m/d第43-44页
        3.10.3 Temperature distribution at seepage velocity 1 m/d第44-46页
        3.10.4 Temperature distribution at water seepage velocity 1.5 m/d第46-47页
        3.10.5 Temperature distribution at water seepage velocity 2 m/d第47-49页
        3.10.6 Comparison of Temperature distribution at different water Seepage velocities at upstream monitoring point M_1第49-50页
        3.10.7 Comparison of Temperature distribution at different water Seepage velocities at downstream monitoring point M_2第50-51页
    3.11 Effect of different soil types on Artificial Ground freezing第51-53页
        3.11.1 Introduction第51页
        3.11.2 Simulation Results of behavior of artificial ground freezing for different soil types第51-53页
    3.12 Brief Summary第53-55页
Chapter 4 Validation of numerical work with past experimental results第55-62页
    4.1 Introduction第55页
    4.2 Experimental model第55-56页
    4.3 Finite Element Modeling第56-57页
        4.3.1 Ground Modelling第56-57页
        4.3.2 Initial and Boundary conditions第57页
        4.3.3 Mesh and Elements types第57页
    4.4 Comparison of numerical and past experimental results第57-61页
        4.4.1 Temperature distribution in the absence of seepage flow第57-59页
        4.4.2 Temperature distribution at water seepage velocity 1.5 m/d第59-60页
        4.4.3 Temperature distribution at water seepage velocity 2.1 m/d第60-61页
    4.5 Brief Summary第61-62页
Chapter 5 Numerical Simulation of artificial ground freezing for Harbin metro station tunnel第62-75页
    5.1 Project overview第62页
    5.2 Weather conditions第62页
    5.3 Geological Situation第62-64页
    5.4 Construction scheme Design第64页
    5.5 Freezing hole arrangement第64页
    5.6 Freezing wall Design第64页
    5.7 Main Construction Technology parameter第64-66页
    5.8 Numerical Simulation of Harbin metro station tunnel project第66-69页
        5.8.1 Introduction第66页
        5.8.2 Computational models第66页
        5.8.3 Ground modeling第66-67页
        5.8.4 Modeling of freezing pipes第67-69页
    5.9 Initial and Boundary conditions第69-70页
    5.10 Governing Equations第70-71页
        5.10.1 Heat transfer in a porous medium第70-71页
    5.11 Mesh and Elements types第71页
    5.12 Simulation results第71-72页
    5.13 Comparison of numerical data and in-situ measurement results第72-74页
    5.14 Brief summary第74-75页
Conclusions第75-77页
References第77-83页
Acknowledgement第83-84页
Resume第84页

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