Influence of Uncertainty Strength Parameters and Anchor Stresses: A Case Study of Landslide in Northern Taiwan

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研究生：	Varian Harwin Batistuta Varian Harwin Batistuta
論文名稱：	Influence of Uncertainty Strength Parameters and Anchor Stresses: A Case Study of Landslide in Northern Taiwan Influence of Uncertainty Strength Parameters and Anchor Stresses: A Case Study of Landslide in Northern Taiwan
指導教授：	李安叡 An-Jui Li
口試委員:	廖洪鈞 Hung-Jiun Liao 鄭世豪 Shih-Chiah Cheng 陳韋志 Wei-Chih Chen
學位類別：	碩士 Master
系所名稱：	工程學院 - 營建工程系 Department of Civil and Construction Engineering
論文出版年：	2022
畢業學年度：	110
語文別：	英文
論文頁數：	74
外文關鍵詞：	landslide, anchor order, strength reduction
相關次數：	點閱：170 下載：0
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A fatal landslide incident occurred at The Freeway No.3, located in Northern Taiwan, on April 25, 2010. From the post-failure investigations, it is found that the deteriorating anchor systems and uncertainties in strength parameters as the most likely the primary reasons for this slope failure. This study conducted a numerical modeling work using Universal Distinct Element Code (UDEC), a two-dimensional numerical program based on the distinct element method. First, the numerical modeling was generated to check the original design of this dip-slope failure. Then a series of parametric studies were introduced to investigate the influences of the triggering design factors that affected this slope-failure event. The ground anchor failure order in this slope is also assessed by bracketing approach and strength-reduction method using a new term called “Adjusted Factor”. Furthermore, this study will focus on an anchors’ failure order from the perspective of the random field to assess whether the anchors’ failure mechanism considering the random field will match or be closely similar to the anchor failure order in the field.

ABSTRACT            i
TABLE OF CONTENTS    ii
LIST OF FIGURES            iv
LIST OF TABLES            vii
CHAPTER 1.INTRODUCTION    1
1. Research Background    1
2. Research Objectives    2
3. Thesis Structure    2
4. Research Layout    1
CHAPTER 2.LITERATURE REVIEW    2
1.   Types of Slope Movement and Landslides    2
1.1. Falls    3
1.2. Topples    4
1.3. Slides    5
1.4. Lateral Spreads    7
1.5. Flows    8
2.    Prestressed Ground Anchor    12
3.    Geotechnical Uncertainty    15
4.    Case study of National Freeway No.3 Landslide, Taiwan    17
CHAPTER 3.    METHODOLOGY    19
1.    Introduction    19
2    Distinct Element Method    20
3    UDEC Numerical Software Program    22
3.1    Constitutive Model    23
3.2. Joint Properties    24
3.3. Structural Elements : Global Shearing-Resistant Reinforcement (Cable Command)    25
3.4. Factor of Safety Basic Calculation in UDEC    26
3.5    Anchored Slope Analysis Approach : Factor of Safety Calculation, Strength Reduction Method, Bracketing Approach and Adjusted Factor    27
4    Construction of Models and Determination of Input Parameters : Uniform and Random Field Model    30
4.5    Uniform Model    30
4.6    Random Field Variability Model    32
5    Parametric Study    36
CHAPTER 4.    RESULT AND DISCUSSION    39
1.    Study case results    39
1.1    Uniform model    39
2.1.    Random Field Consideration    44
CHAPTER 5.    CONSLUSION AND FUTURE WORK    49
1.    Conclusion    49
2.    Future Work    50
REFERENCES    51
APPENDIX    54



                                

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全文公開日期 2032/09/26 (校外網路)
全文公開日期 2032/09/26 (國家圖書館：臺灣博碩士論文系統)

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