| Acknowledgements | 第5-6页 |
| 中文详细摘要 | 第6-11页 |
| 摘要 | 第11-12页 |
| ABSTRACT | 第12页 |
| 1 INTRODUCTION | 第16-20页 |
| 1.1 BACKGROUND | 第16-17页 |
| 1.2 RESEARCH OBJECTIVES AND TASKS | 第17-18页 |
| 1.3 INNOVATION POINTS OF THE RESEARCH | 第18页 |
| 1.4 THE OUTLINE OF THESIS | 第18-20页 |
| 2 FUNDAMENTAL CONCEPTS AND LITERATURE REVIEW | 第20-36页 |
| 2.1 CRITICAL STATE SOIL MECHANICS | 第20-21页 |
| 2.2 SOIL-WATER CHARACTERISTIC CURVE | 第21-22页 |
| 2.3 CHANGES IN SOIL STRUCTURE | 第22-23页 |
| 2.4 TRIAXIAL TESTING | 第23-26页 |
| 2.5 CONTRIBUTION OF MATRIC SUCTION AND DEGREE OF SATURATION INCRITICAL SHEAR STRENGTH APPROACHES | 第26-27页 |
| 2.6 ULTIMATE (CRITICAL) SHEAR STRENGTH CRITERIA FOR UNSATURATED SOILS | 第27-36页 |
| 2.6.1 Single effective stress approach | 第27-31页 |
| 2.6.2 Two-independent stress approach | 第31-36页 |
| 3 NECESSARY CONDITIONS FOR THE CRITICAL STATE OFUNSATURATED SOILS | 第36-42页 |
| 3.1 THERMODYNAMIC CONDITIONS FOR THE STEADY STATE | 第37-38页 |
| 3.2 CONDITIONS FOR UNSATURATED SOIL TO REACH CRITICAL STATE | 第38-42页 |
| 4 CRITICAL STATE EQUATIONS FOR UNSATURATED SOIL | 第42-121页 |
| 4.1 SOIL MATERIALS AND EXPERIMENTAL PROGRAM | 第42-55页 |
| 4.1.1 Index properties of the soil materials | 第42-49页 |
| 4.1.2 Experimental program | 第49-55页 |
| 4.2 TEST RESULTS | 第55-92页 |
| 4.2.1 Soil water characteristic curve(SWCC) | 第55-61页 |
| 4.2.2 Constant suction (CS)triaxial tests | 第61-76页 |
| 4.2.3 Constant water content (CW) triaxial test | 第76-92页 |
| 4.3 CRITICAL STATE FOR CONSTANT SUCTION TESTS | 第92-112页 |
| 4.3.1 Critical state at saturated state for CS tests | 第92-95页 |
| 4.3.2 Unsaturated critical state variables relationships for CS tests | 第95-112页 |
| 4.4 CRITICAL STATE FOR CONSTANT WATER CONTENT TESTS | 第112-121页 |
| 4.4.1 Critical state line at saturated sate for CW tests | 第112-114页 |
| 4.4.2 Critical state line at unsaturated state for CW tests | 第114-121页 |
| 5 COMPARISONS OF DIFFERENT CRITICAL STATE FRAMEWORKS | 第121-174页 |
| 5.1 INTERPRETATIONS OF THE DEVIATOR STRESS AT CRITICAL STATE FOR CS TESTS | 第121-140页 |
| 5.1.1 Introduction of different expressions of deviator stress at critical state | 第121-127页 |
| 5.1.2 Comparison of the predicted critical state deviator stress by differentequations | 第127-140页 |
| 5.2 INTERPRETATION OF THE CRITICAL STATE SPECIFIC VOLUME BASED ON THEEQUATIONS FROM THE LITERATURE | 第140-165页 |
| 5.2.1 Introduction of different expressions of specific volume at critical state | 第140-153页 |
| 5.2.2 Comparison of the predicted specific volume at critical state bydifferent equations | 第153-165页 |
| 5.3 INTERPRETATIONS OF THE CRITICAL STATE DEVIATOR STRESS AND SPECIFICVOLUME FOR CW TESTS | 第165-174页 |
| 5.3.1 Introduction of different expressions of deviator stress and specificvolume at critical state | 第165-170页 |
| 5.3.2 Comparison between predicted and measured critical state deviatorstress and specific volume for CW tests | 第170-174页 |
| 6 CONCLUSION AND PROSPECT | 第174-177页 |
| 6.1 MAIN CONCLUSIONS | 第174-175页 |
| 6.2 FUTURE RESEARCH SUGGESTIONS | 第175-177页 |
| REFERENCE | 第177-183页 |
| APPENDIX A COMPARISON OF THE EFFECT OF STATIC AND DYNAMICLABORATORY COMPACTION METHODS ON SHEAR STRENGTH | 第183-192页 |
| APPENDIX B EFFECT OF PARTICLE SIZE AND DIMENSION OF SOILSPECIMEN ON TRIAXIAL SHEAR STRENGTH PARAMETERS OF COARSESOIL | 第192-196页 |
| 作者简历及攻读博士学位期间取得的研究成果 | 第196-198页 |
| 学位论文数据集 | 第198页 |
