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研究生： Chandra Suciadi
Chandra - Suciadi
論文名稱： Analysis of Deep Excavation with Buttress Walls Using the Finite Element Method
Analysis of Deep Excavation with Buttress Walls Using the Finite Element Method
指導教授： Professor Chang-Yu Ou
歐章煜
口試委員: Hsieh-Pai Go
Hsieh-Pai Go
楊國鑫
Kuo-Hsin Yang
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： 2012
畢業學年度： 100
語文別： 英文
論文頁數： 140
中文關鍵詞： Buttress walls 、Hardening soil 、Deep Excavation 、There-dimensional FE analysis
外文關鍵詞： Buttress walls, Hardening soil, Deep Excavation, There-dimensional FE analysis
相關次數： 點閱：277  下載：22 
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    • This study aims to analyze the effect of buttress walls in deep excavation using 3D finite element method. Three scenarios of hardening soil (HS) model inputs parameters were selected in this study. The reasonable soil inputs of HS model from the scenarios were obtained by comparing computed and measured of wall deflection and ground settlement in UPIB excavation case, the well documented case study. This work also explores the effects of buttress walls in wall deflection and ground settlement by performing parametric studies based on previous study (TNEC case). Effects of excavation depth (He), excavation width (B), interval of buttress wall (Sb), and length of buttress wall (L¬b) on wall deflection and ground settlement were studied. Results of parametric studies indicate that the wall deflection and ground settlement forming a curve shape. This study introduced Deflection Reduction Ratio (DRR) and Settlement Reduction Ratio (SRR) to quantify the effects of buttress walls. DRR and SRR curve are observed with similar pattern each other in this study. It was also observed for 20m and 30m excavation cases, SRR shows slightly larger value than DRR. This study provides insightful information for buttress walls design in deep excavations

    This study aims to analyze the effect of buttress walls in deep excavation using 3D finite element method. Three scenarios of hardening soil (HS) model inputs parameters were selected in this study. The reasonable soil inputs of HS model from the scenarios were obtained by comparing computed and measured of wall deflection and ground settlement in UPIB excavation case, the well documented case study. This work also explores the effects of buttress walls in wall deflection and ground settlement by performing parametric studies based on previous study (TNEC case). Effects of excavation depth (He), excavation width (B), interval of buttress wall (Sb), and length of buttress wall (L¬b) on wall deflection and ground settlement were studied. Results of parametric studies indicate that the wall deflection and ground settlement forming a curve shape. This study introduced Deflection Reduction Ratio (DRR) and Settlement Reduction Ratio (SRR) to quantify the effects of buttress walls. DRR and SRR curve are observed with similar pattern each other in this study. It was also observed for 20m and 30m excavation cases, SRR shows slightly larger value than DRR. This study provides insightful information for buttress walls design in deep excavations

    AbstractI AcknowledgementsII Table of ContentsIII List of TablesV List of FiguresVI CHAPTER 1 Introduction1 1.1 Background1 1.2 Objectives1 1.3 Thesis Structure2 CHAPTER 2 Literature Review3 2.1 Buttress Wall in Deep Excavation3 2.2 Overview of Hardening Soil Model7 2.2.1 Hardening Soil Model Stiffness Method 19 2.2.2 Hardening Soil Model Stiffness Method 210 2.2.3 Hardening Soil Model Stiffness Method 311 CHAPTER 3 CASE STUDY OF EXCAVATION WITH CROSS WALLS AND BUTTRESS WALLS13 3.1 Overview of UPIB case13 3.2 Input Parameters and Simulation14 3.3 Analysis Effect of Buttress Wall in Deep Excavation17 3.3.1 Comparison Results for Method 1 and Method 218 3.3.2 Comparison Results for Method 1 and Method 319 3.3.3 Comparison Results for Method 3 with Different E_50^ref/E_oed^ref Ratio19 3.4 Summary and Conclusion20 CHAPTER 4 Parametric Study of Buttress Wall21 4.1 Introduction21 4.2 Input Parameters and Simulation22 4.3 Effects of Excavation Geometry against Buttress Wall Effectiveness22 4.3.1 Excavation Simulation cases using 4 and 6 Buttress Walls22 4.3.2 The Comparison Analysis of Parametric Study Results23 4.3.3 DRR Analysis Results In Parametric Study Case26 4.3.4 SRR Analysis Results In Parametric Study Case27 4.3.5 Comparison between DRR and SRR Analysis29 4.4 Summary and Discussion30 4.4.1 Summary30 4.4.2 Discussion31 CHAPTER 5 CONCLUSION AND FUTURE RESEARCH32 5.1 Conclusion32 5.2 Future Research32 REFERENCES33

    PLAXIS 3D 2010 Manual
    Ou, C. Y. (2006). “Deep Excavation: Theory and Practice”. Taylor & Francis, Netherlands
    Lim, A., Ou, C. Y., Hsieh, P. G (2010). “Evaluation of clay constitutive models for analysis of deep excavation under drained condition.” Journal of Geo-Engineering, Vol. 5, No. 1, pp. 9-20
    Ou, C. Y., Lin, Y. L., and Hsieh, P. G. (2006), “Case record of an excavation with cross walls and buttress walls,” Journal of GeoEngineering, Vol. 1, No. 2, pp. 79-86.
    Ou, C. Y., Hsieh, P. G., and Lin, Y. L. (2011), “Performance of Excavations with Cross Walls,” Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 137, No. 1.
    Ou, C. Y., Chiou, D. C. and Wu, T. S. (1996). “Three-dimensional finite element analysis of deep excavations.” Journal of Geotechnical Engineering, ASCE, 122(5), 337−345.
    Ou, C. Y., Hsieh, P. G. and Chiou, D. C. (1993). “Characteristics of ground surface settlement during excavation.” Canadian Geotechnical Journal, 30, 758−767.
    Chen, S. L., Ho, C. T., Li, C. D., and Gui, M. W (2011). “Efficiency of Buttress Walls in Deep Excavations.” Journal of GeoEngineering, vol. 6, No. 3, 145-146

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