青海浪加水库边坡稳定性研究

发布时间：2021-04-25 14:21

　　边坡稳定性评估是地质工程工程师研究的常规性课题。边坡稳定性预在大坝、道路、隧道、开挖、露天矿等工程结构设计起着重要作用。本文对岩质边坡稳定性及滑坡的形成机理进行了分析研究。水库大坝建设是世界各国的重要研究课题,对于存在能源危机的发展中国家更是如此。水库在蓄水过程中可能会激活古滑坡体、诱导或触发滑坡。因此,本文对中国青海省浪加水库左岸的1号滑坡A-A’剖面、2号滑坡剖面及3号滑坡剖面进行了边坡稳定性分析。在边坡稳定分析中,安全值的主要指标仍然是斜坡距离失效点初始值的大小。对于安全系数评价因子,基于极限平衡法的Bishop法和Morgenstern-Price法,对GeoStudio软件的SLOPE/W模块进行剖面A-A’,剖面2和剖面3的二维边坡稳定性分析。基于有限差分法的强度折减技术,将FLAC3D软件用于边坡3的边坡稳定性分析。在不同的工况条件下,使用上述两种方法计算安全系数（FS）并绘制结果。分别运用Bishop法和极限平衡Morgenstern-Price法对自然条件（a）、暴雨条件（b）地震条件（c）和水库蓄水条件（d）这四种工况下的边坡进行了二维稳定性计算。计算结果表现出:A... 

【文章来源】：中国地质大学(北京)北京市 211工程院校 教育部直属院校

【文章页数】：84 页

【学位级别】：硕士

【文章目录】：
Abstract
摘要
Chapter 1 – Introduction
    1.1 Background
    1.2 Study Area
    1.3 Objectives
    1.4 Methodology
    1.5 Summary
Chapter 2 - Literature Review
    2.1 Slope Stability
    2.2 Slope Failures Types and Mechanism of Instability
    2.3 Limit Equilibrium Method
    2.4 Numerical Simulation Methods
    2.5 Factor of Safety （FS） Calculations
    2.6 Comparison from Other （Previous） Studies
Chapter 3 - Engineering Geology of Slope
    3.1 Local Geology of The Slope
        3.1.1 Stratum and Lithology of Bedrock
        3.1.2 Geological Structure of The Slope
        3.1.3 Rock Mass of Dam Foundation
        3.1.4 Physical and Mechanical Properties and Recommended Parameters of Rock Mass
    3.2 Slope Profile
Chapter 4 -Slope Stability Analysis by Using 2-Dimensional Limit Equilibrium Method
    4.1 Limit Equilibrium Method
        4.1.1 Bishop Method
        4.1.2 Morgenstern-price Method
    4.2 Geo Studio
        4.2.1 Solve Process
    4.3 Calculation Conditions
        4.3.1 Natural Working Condition
        4.3.2 Rainstorm Condition
        4.3.3 Earthquake Condition
        4.3.4 Reservoir Condition
    4.4 Physical and Mechanical Parameters of Rocks and Soil
    4.5 Slope Stability Analysis of Profile A-A'
    4.6 Slope Stability Analysis of Profile
    4.7 Slope Stability Analysis of Profile
    4.8 Result of 2D Limit Equilibrium Method
Chapter 5 - Slope Stability Analyses of Slope 3 Using Three Dimensional Fl AC3D
    5.1 Preface
        5.1.1 Advantages of FLAC3D
    5.2 Definition of Concept
        5.2.1 Definition of Symbols
        5.2.2 Calculation of Strain Rate
        5.2.3 Expression of Motion Equation in Nodes3
        5.2.4 Stress Calculation
        5.2.5 Calculation of Unbalance Force
        5.2.6 Calculation of Velocity and Displacement
    5.3 Principle of Solving Slope Stability Coefficient Based on Strength Reduction Technique
    5.4 Geometric Model of Slope
    5.5 Physical and Mechanical Parameters of the Slope
    5.6 FLAC3D Numerical Simulation Analysis of Left Bank Slope
        5.6.1 Working Condition One
        5.6.2 Working condition Two
        5.6.3 Working condition Three
        5.6.4 Working Condition Four
        5.6.5 Working Condition Five
    5.7 Summary of Left Bank Slope
Chapter 6 - Conclusions
Acknowledgements
References


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