| ACKNOWLEDGEMENTS | 第5-6页 |
| ABSTRACT | 第6页 |
| 摘要 | 第7-16页 |
| 1. INTRODUCTION | 第16-20页 |
| 1.1 Problem statement | 第16-17页 |
| 1.2 Thesis objectives | 第17-18页 |
| 1.3 Research methodology | 第18页 |
| 1.4 Scope of study | 第18页 |
| 1.5 Thesis outline | 第18-20页 |
| 2. OVERVIEW OF STONE COLUMN TECHNIQUE | 第20-31页 |
| 2.1 Overview of stone column-reinforced soft ground | 第20-26页 |
| 2.1.1 Introducing stone -column | 第20-21页 |
| 2.1.2 Construction technology of stone-column | 第21-25页 |
| a) Ramming method | 第21-22页 |
| b) Vibro-replacement method | 第22-25页 |
| 2.1.3 Advantages and disadvantages of stone column technique | 第25-26页 |
| 2.2 General behaviour of stone columns | 第26-30页 |
| 2.2.1 Behaviour of single stone column | 第26-28页 |
| 2.2.2 Behaviour of stone-column groups | 第28-30页 |
| 2.3 Chapter summary | 第30-31页 |
| 3. CHARACTERISTICS OF BEARING CAPACITY AND SETTLEMENT OF STONECOLUMN-REINFORCED SOFT GROUND | 第31-56页 |
| 3.1 Basic conceptions for bearing capacity and settlement calculations of stone column-reinforced soft ground | 第31-34页 |
| 3.1.1 Unit cell | 第31页 |
| 3.1.2 Area replacement ratio | 第31-32页 |
| 3.1.3 Stress concentration factor | 第32-34页 |
| 3.2 Ultimate bearing capacity of stone column-reinforced soft ground | 第34-41页 |
| 3.2.1 Bearing capacity of soil reinforced with a single stone column | 第34-40页 |
| 3.2.2 Bearing capacity of soil reinforced with stone-column group | 第40-41页 |
| 3.3 Settlement of stone column-reinforced soft ground | 第41-55页 |
| 3.3.1 Equilibrium method | 第41-44页 |
| 3.3.2 Priebe method | 第44-49页 |
| 3.3.3 Finite element method | 第49-51页 |
| 3.3.4 Rate of primary consolidation settlement estimation | 第51-54页 |
| 3.3.5 Secondary compression settlement estimation | 第54-55页 |
| 3.4 Chapter summary | 第55-56页 |
| 4. FINITE ELEMENT ANALYSIS OF SETTLEMENT OF STONE COLUMN-REINFORCED SOFT GROUND USING PLAXIS SOFTWARE | 第56-71页 |
| 4.1 Introduction | 第56页 |
| 4.2 Theoretical work | 第56-62页 |
| 4.2.1 Definition of embankment modeling | 第56-59页 |
| 4.2.2 Material parameters | 第59-60页 |
| 4.2.3 Performing calculations | 第60-61页 |
| 4.2.4 Parametric study | 第61-62页 |
| 4.3 Results and discussion | 第62-70页 |
| 4.3.1 Influence of area replacement ratio | 第62-63页 |
| 4.3.2 Influence of improvement thickness | 第63-65页 |
| 4.3.3 Influence of deformation modulus of stone column material | 第65-66页 |
| 4.3.4 Influence of cohesion of SC material | 第66-67页 |
| 4.3.5 Influence of internal friction angle of column material | 第67页 |
| 4.3.6 Comparison of 2D and 3D FE model results | 第67-68页 |
| 4.3.7 Comparison of results obtained from PLAXIS and analytical solutions | 第68-70页 |
| 4.4 Chapter summary | 第70-71页 |
| 5. EVALUATION ON EFFECTIVENESS OF STONE COLUMN-REINFORCEDSOFT GROUND IN THE MEKONG DELTA | 第71-108页 |
| 5.1 Introduction | 第71页 |
| 5.2 Effectiveness of ground treated by SCs of Lai Vung Department Store | 第71-90页 |
| 5.2.1 Overview of project and design task | 第71-73页 |
| 5.2.2 Geological overview of construction site | 第73-75页 |
| 5.2.3 Calculation model and load | 第75-76页 |
| 5.2.4 Bearing capacity calculation of treated and untreated ground | 第76-85页 |
| 5.2.5 Settlement calculation of treated and untreated ground | 第85-90页 |
| 5.3 Evaluation on stone column-reinforced soft ground using FEM | 第90-102页 |
| 5.3.1 Evaluation on bearing capacity of the improved ground | 第90-95页 |
| 5.3.2 Evaluation on settlement of the improved ground | 第95-99页 |
| 5.3.3 Evaluation on stress concentration factor of the improved ground | 第99-102页 |
| 5.4 Evaluation of effectiveness of various ground improvement methods | 第102-107页 |
| 5.4.1 Ground treated by soil-cement columns method | 第102-103页 |
| 5.4.2 Ground treated by pile-supported concrete floors method | 第103-104页 |
| 5.4.3 Evaluation of economic and technical efficiency of various reinforcementmethods | 第104-107页 |
| 5.5 CHAPTER SUMMARY | 第107-108页 |
| 6. CONCLUSIONS AND RECOMMENDATIONS | 第108-111页 |
| 6.1 Conclusions | 第108-109页 |
| 6.2 Recommendations | 第109-110页 |
| 6.3 Scope for future research | 第110-111页 |
| REFERENCES | 第111-115页 |
| APPENDIX A. SETTLEMENT CURVES FOR DIFFERENT KEY DESIGNPARAMETERS | 第115-118页 |
| APPENDIX B. REINFORCED SOFT GROUND BY SOIL-CEMENT COLUMNMETHOD | 第118-122页 |
| APPENDIX C. REINFORCED SOFT GROUND BY PILE- SUPPORTED CONCRETEFLOORS METHOD | 第122-125页 |
| APPENDIX D. TABLE OF QUANTITIES AND COST ESTIMATION FOR VARIOUSSOIL REINFORCEMENT METHODS | 第125-129页 |
| DATA TABLE | 第129页 |
