Numerical Simulations of an Excavation in Central Jakarta by Hypoplasticity Model with Consideration of Recent Stress History

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研究生：	許夏雪 Melisa Kosasi
論文名稱：	Numerical Simulations of an Excavation in Central Jakarta by Hypoplasticity Model with Consideration of Recent Stress History Numerical Simulations of an Excavation in Central Jakarta by Hypoplasticity Model with Consideration of Recent Stress History
指導教授：	鄧福宸 FU-CHEN TENG 熊彬成 Bin-Chen (Benson) Hsiung
口試委員:	李安叡 An-Jui Li
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：	2018
畢業學年度：	106
語文別：	英文
論文頁數：	131
中文關鍵詞：	Hypoplasticity model 、recent stress-history 、deep excavation 、Jakarta clay
外文關鍵詞：	Hypoplasticity model, recent stress-history, deep excavation, Jakarta clay
相關次數：	點閱：181 下載：19
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An advanced soil constitutive model is needed to simulate real soil behavior in a complex
situation, such as in urban area. In this study, hypoplasticity model for clay (HC model)
which capable of modeling small strain stiffness non-linearity, recent stress-history
effects, and large-strain asymptotic for clays was thus used. Numerical simulations of a
non-symmetric deep excavation in central Jakarta using HC model in consideration of
pre-excavation recent stress history were carried out in this study. The excavation site is
located at Dukuh Atas MRT station in central Jakarta. The excavation, with a road
embankment on one side, was constructed in medium-stiff Jakarta clay using the topdown
construction method. 2D finite element (FE) analyses was adopted for numerical
simulations. Soil properties used for excavation simulations were determined from
laboratory and field tests. Those properties were also calibrated for HC model. Numerical
analysis of excavation case at Dukuh Atas station was also simulated by using MohrColoumb
(MC). Output results of numerical simulation using MC and HC model were
evaluated. Measurements of wall deflections during the construction were also corrected
and presented for comparison purpose to simulation results.

ABSTRACT ................................................................................................................ i
ACKNOWLEDGEMENTS ........................................................................................ ii
TABLE OF CONTENT ............................................................................................ iii
LIST OF TABLES ..................................................................................................... v
LIST OF FIGURES ................................................................................................... vi
LIST OF SYMBOLS AND ABBREVIATIONS ....................................................... ix
CHAPTER 1 INTRODUCTION ............................................................................. 1
1 Background ......................................................................................................... 1
2 Research objectives ............................................................................................. 2
3 Thesis structure ................................................................................................... 2
CHAPTER 2 LITERATURE REVIEW................................................................... 5
1 Introduction ........................................................................................................ 5
2 Characteristic of Wall Deformation Induced by Excavation ................................ 5
3 Hypoplasticity model .......................................................................................... 8
4 Correction of Inclinometer Reading .................................................................. 10
5 Recent stress history .......................................................................................... 11
CHAPTER 3 JAKARTA MRT SYSTEM ............................................................ 14
1 Introduction ...................................................................................................... 14
2 Deep Excavation of Jakarta MRT at Dukuh Atas station (CP106) ..................... 15
3 Inclinometer Readings....................................................................................... 18
CHAPTER 4 SITE EXPLORATION AND CHARACTERIZATION OF JAKARTA
MRT PROJECT ....................................................................................................... 21
1 Introduction ...................................................................................................... 21
2 Literature Review on Geotechnical Characteristics of Jakarta Soil..................... 21
2.1 Topography Setting .................................................................................. 21
2.2 Structural Geology of Jakarta Basin .......................................................... 22
2.3 Ground Condition in Central Jakarta ........................................................ .25
3 Characteristic of volcanic soil ........................................................................... 27
4 Subsurface Exploration ..................................................................................... 34
4.1 Stratigraphic Profile.................................................................................. 35
4.2 Observed Groundwater Table ................................................................... 36
4.3 Standard Penetration Test (SPT-N) ........................................................... 37
4.4 Cone Standard Penetration Test (CPT) ............................................................. 39
5 Laboratory Test ................................................................................................. 40
5.1 Index Properties ....................................................................................... 41
5.2 Compressibility ........................................................................................ 42
5.3 Permeability and Hydraulic Conductivity ................................................. 44
5.4 Isotropic consolidation parameters ........................................................... 46
5.5 Critical State Strength Parameters ............................................................. 46
5.6 Intergranular Strain Parameters................................................................. 48
5.7 Undrained Shear Strength Parameters ....................................................... 49
5.8 Soil Modulus ............................................................................................ 51
6 Evaluation of sample disturbance ...................................................................... 52
7 Calibration Parameters ...................................................................................... 54
7.1 Isotropic consolidation parameters calibration .......................................... 54
7.2 Shear strength parameters calibration ....................................................... 60
CHAPTER 5 NUMERICAL SIMULATION FOR A NON-SYMMETRIC
EXCAVATION ....................................................................................................... 64
1 Introduction ...................................................................................................... 64
2 Input Parameters ............................................................................................... 64
2.1 Soil Parameters ......................................................................................... 64
2.2 Structure Parameters ................................................................................. 66
3. Numerical model configuration ......................................................................... 67
3.1 Geometrical model ................................................................................... 67
3.2. Simulation method for the embankment................................................... 69
4. Numerical simulation results ............................................................................. 72
4.1. HC-model Method 1 ................................................................................ 73
4.2. HC-model Method 2 ............................................................................... .76
4.3. HC-model Method 3 ................................................................................ 80
4.4. MC-model Method 1 ............................................................................... 83
4.5. Comparison and discussion...................................................................... 85
CHAPTER 6 CONCLUSIONS AND RECOMMENDATIONS .......................... 91
1. Summary of Research Objectives ...................................................................... 91
2. Conclusions ...................................................................................................... 91
3. Recommendations ............................................................................................. 92
REFERENCES....................................................................................................... R-1
APPENDIX ............................................................................................................ A-1
                                

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