南京纬三路盾构法隧道施工引起地表沉降研究

发布时间：2021-02-14 21:36

　　交通拥挤和环境因素使得对城市地下空间的利用有更大的需求,但城市隧道的开挖引起的地表沉降会对现有结构造成负面影响,因此,隧道开挖造成的地表沉降对隧道施工特别是在城市地区十分重要。隧道地表沉降是由应力衰减引和开挖支撑的移动引起的,趋势取决于几个因素,如隧道的几何形状,地面控制条件等等。在工程实践中往往使用不同的设计方法估计地表沉降变化,从简单的经验分析到有限单元法求得解析解。根据不同的方法,应用于隧道开挖和支撑模型的程序也不尽相同。基于上述问题,完成了本文”盾构法施工引起地表沉降的研究”。首先,根据经验解、解析解和数值解对隧道地表沉降预测进行总结。随后分析了隧道开挖引起的地表沉降特征、引起施工沉降的原因、开挖面的侧向和纵向沉降及开挖面的稳定性。其次,本文介绍了南京纬三路过江隧道工程在保健村的工程的工程背景和规模以及施工的的自然条件,对南京纬三路过江隧道项目施工阶段收集的数据进行了深入处理和分析。之后采用数值模拟分析有限元法（FEM）利用数值模拟软件ABAQUS进行二维和三维的有限元分析。有限元模拟过程中验证了合适的开挖模拟和支撑顺序,特别是恰当的边界条件对结果的重要性。同时对不同埋深、不同... 

【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校

【文章页数】：130 页

【学位级别】：硕士

【文章目录】：
摘要
Abstract
List of symbols
Chapter 1 Introduction
    1.1 The research background and significance
    1.2 The prediction of ground movements due to tunneling
        1.2.1 Empirical methods
        1.2.2 Analytical solutions
        1.2.3 Numerical analyses methods
            1.2.3.1 Two-dimensional Finite Elements Models （2D-FEM） analyses
            1.2.3.2 Three-dimensional Finite Elements Models （3D-FEM） analyses
    1.3 The main research contents of this thesis
Chapter 2 Analysis of ground settlement and stability of excavation face
    2.1 Introduction
    2.2 Shield construction principle
        2.2.1 Development of Shield Method
        2.2.2 Principle of Shield Method
    2.3 Characteristics of ground settlement caused by shield tunneling
        2.3.1 The ground surface settlement before shield arrival
        2.3.2 Ground settlement due to shield construction
        2.3.3 Post consolidation settlement
    2.4 Causes for construction induced settlements
        2.4.1 Case of shield-driven tunnels
            2.4.1.1 Settlements ahead and above the face
            2.4.1.2 Settlements along the shield
            2.4.1.3 Settlements at the shield tail
            2.4.1.4 Settlements due to lining deformation
        2.4.2 Effect of groundwater
    2.5 Analysis of lateral and longitudinal ground surface settlement
        2.5.1 Analysis of transversal ground surface settlement
            2.5.1.1 Analysis of vertical settlement in the transversal direction
            2.5.1.2 Analysis of Horizontal displacement in the transversal direction
        2.5.2 Analysis of longitudinal ground surface settlement
            2.5.2.1 Analysis of vertical settlement in the longitudinal direction
            2.5.2.2 Analysis of horizontal displacement in the longitudinal direction
    2.6 Subsurface movement
    2.7 stability of excavation face
        2.7.1 Limiting Equilibrium Methods （LEM）
            2.7.1.1 Method of Broms and Bennemark （1967）
            2.7.1.2 Method of Krause （1987）
            2.7.1.3 Method of Anagnostou and Kovari （1996）
        2.7.2 Limiting Analysis Methods （LAM）
            2.7.2.1 Method of Davis et al. （1980）
            2.7.2.2 Method of Leca and Dormieux （1990）
    2.8 Brief Summary
Chapter 3 Numerical modelling on ground settlement induced by shield tunnel method
    3.1 Introduction
    3.2 Presentation of Nanjing three Yangtze River tunnel Project
        3.2.1 Project overview
        3.2.2 Geological Situation
        3.2.3 Weather conditions
        3.2.4 Hydrogeological condition
    3.3 Computational models
    3.4 Finite Element Modeling
        3.4.1 Ground modeling
        3.4.2 Tunnel lining modeling
        3.4.3 Grout modeling
        3.4.4 Shield machine modeling
    3.5 Mesh and Elements types
    3.6 Boundary conditions and loading
        3.6.1 Boundary conditions
        3.6.2 Loading
    3.7 Numerical simulation method
    3.8 Brief Summary
Chapter 4 Simulation results and field measurement data
    4.1 Introduction
    4.2 Field measurement data
        4.2.1 Monitoring program
        4.2.2 Field result analysis
            4.2.2.1 Longitudinal settlement analysis
            4.2.2.2 Lateral settlement analysis
        4.2.3 Comparison of field measurement and empirical prediction
    4.3 Simulation results and analysis
        4.3.1 Analysis of ground settlement caused by shield construction
            4.3.1.1 Vertical settlement in the transversal direction
            4.3.1.2 Horizontal displacement in the transversal direction
            4.3.1.3 Vertical settlement in the longitudinal direction
        4.3.2 Comparison of numerical simulation and empirical prediction
        4.3.3 Analysis of Ground Settlement under different tunnel buried depth
            4.3.3.1 Vertical settlement under different tunnel buried depths
            4.3.3.2 Horizontal displacement under different tunnel buried depths
            4.3.3.3 Comparison of ground settlement between the various cases of tunnelburied depth
        4.3.4 Analysis of the effect of shield tail grouting on ground settlement
            4.3.4.1 Vertical settlement for each Grout Condition
            4.3.4.2 Horizontal displacement for each Grout Condition
            4.3.4.3 Comparison of ground settlement between the various cases of Groutcondition
    4.4 Comparison of numerical simulation and field measurement
    4.5 Brief summary
Conclusions
结论
References
Acknowledgement
Resume


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期刊论文
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