| ACKNOWLEDGEMENT | 第5-6页 |
| 摘要 | 第6-7页 |
| ABSTRACT | 第7页 |
| 1 INTRODUCTION | 第16-46页 |
| 1.1 Background and significance of study | 第16-39页 |
| 1.1.1 Review of host related problems in Turkey | 第17-28页 |
| 1.1.2 Review of prediction of frost depths for seasonal freezing area | 第28-30页 |
| 1.1.3 Review of thermal properties of reinforced soil under freezing-thawing cycles | 第30-32页 |
| 1.1.4 Review of mechanical properties of reinforced soil under freezing-thawing cycles | 第32-39页 |
| 1.2 Problem statement | 第39-41页 |
| 1.3 Goal and main cont;ent of study | 第41-42页 |
| 1.4 Technical route of thesis | 第42-46页 |
| 2 PHYSICAL AND THERMAL PROPERTIES OF FIBER-REINFORCED SOIL UNDER FREEZE-THAW CYCLES | 第46-72页 |
| 2.1 Introduction | 第46页 |
| 2.2 Materials and methods of physical properties and thermal behavior tests | 第46-57页 |
| 2.2.1 Site and Sampling | 第46-48页 |
| 2.2.2 Fibers and Flyash | 第48-50页 |
| 2.2.3 Test equipment and testing procedure | 第50页 |
| 2.2.4 Preparation of specimens | 第50-53页 |
| 2.2.5 Freeze-thaw test | 第53-55页 |
| 2.2.6 Thermal conductivity test | 第55-57页 |
| 2.3 Effects of freeze-thaw cycles on physical properties of fiber-reinforced soil | 第57-62页 |
| 2.3.1 Mass loss of fiber-reinforced soil after freeze-thaw cycles | 第57-59页 |
| 2.3.2 Changing of water contents of fiber-reinforced soil after freeze-thaw cycles | 第59-60页 |
| 2.3.3 Height changes of fiber-reinforced soil after freeze-thaw cycles | 第60-61页 |
| 2.3.4 Summary of volumetric changes for fiber-reinforced soil | 第61-62页 |
| 2.4 Effects of freeze-thaw cycles on thermal behavior of fiber-reinforced soil | 第62-72页 |
| 2.4.1 Introduction | 第62-63页 |
| 2.4.2 Thermal conductivity of specimens as a function of fiber fraction and temperature | 第63-67页 |
| 2.4.3 Thermal conductivity of specimens as a function of freeze-thaw cycles | 第67-69页 |
| 2.4.4 Comparison of thermal behavior of the fibers-reinforced soil | 第69-72页 |
| 3 FROST DEPTH PREDICTION FOR SEASONAL FREEZING AREA IN EASTERN TURKEY | 第72-94页 |
| 3.1 Introduction | 第72页 |
| 3.2 Characterization of the cold region and transportation-related soil problems in eastern Turkey | 第72-80页 |
| 3.2.1 Mathematical equations related to prediction of frost depths | 第73-80页 |
| 3.2.2 The main transportation-related soil problems resulting from freezing-thawing in eastern Turkey | 第80页 |
| 3.3 Summary and recommendations | 第80-82页 |
| 3.4 Frost depth prediction for fiber-reinforced soil profile in seasonal freezing area | 第82-91页 |
| 3.4.1 Applying mathematical equations to fiber-reinforced soil profile | 第82-84页 |
| 3.4.2 Calculation of frost depths for fiber-reinforced soil | 第84-91页 |
| 3.5 Comparison of frost depth prediction of fibers-reinforced soil | 第91-94页 |
| 4 MECHANICAL BEHAVIORS OF FIBER-REINFORCED SOIL UNDER FREEZE-THAW CYCLES | 第94-142页 |
| 4.1 Introduction | 第94页 |
| 4.2 Materials and methods | 第94-104页 |
| 4.2.1 Test equipment and testing procedure | 第96-97页 |
| 4.2.2 Preparation of specimens | 第97-99页 |
| 4.2.3 Freeze-thaw test | 第99页 |
| 4.2.4 Unconsolidated-undrained (UU) triaxial compression test | 第99-102页 |
| 4.2.5 Dynamic triaxial test | 第102-104页 |
| 4.3 Effect of fiber addition on stress-strain behaviour under freeze-thaw cycles | 第104-127页 |
| 4.3.1 Fracture modes of specimens | 第110-112页 |
| 4.3.2 Effect of confining pressure on stress-strain behaviour under freeze-thaw cycles | 第112-114页 |
| 4.3.3 Effect of freeze-thaw cycles on failure strength | 第114-117页 |
| 4.3.4 Effect of freeze-thaw cycles on shear strength properties | 第117-121页 |
| 4.3.5 Effecrt of freeze-thaw cycles on resilient modulus | 第121-124页 |
| 4.3.6 Comparison of static triaxial compression behaviour of fiber-reinforced soil | 第124-127页 |
| 4.4 Dynamic behavior of fiber-reinforced soil under freeze-thaw cycles | 第127-142页 |
| 4.4.1 Determination of dynamic triaxial test parameters | 第127-129页 |
| 4.4.2 Dynamic stress-strain behaviour of unreinforced and fiber-reinforced soil under freeze-thaw cycles | 第129-133页 |
| 4.4.3 The effect of freeze-thaw cycles on dynamic properties | 第133-140页 |
| 4.4.4 Comparison of dynamic properties of the unreinforced and fiber-reinforced soil | 第140-142页 |
| 5 PREDICTION OF MECHANICAL AND THERMAL PROPERTIES FOR FIBER-REINFORCED SOIL | 第142-210页 |
| 5.1 Introduction | 第142页 |
| 5.2 Prediction of dynamic triaxial parameters of fiber-reinforced soil subjeded to freeze-thaw cycles | 第142-148页 |
| 5.2.1 Dynamic stress-strain relation | 第143-145页 |
| 5.2.2 Dynamic soil models | 第145-148页 |
| 5.3 Prediction of the dynamic shear parameters of the unreinforced and the fiber-reinforced soil | 第148-162页 |
| 5.3.1 Statistical evaluation of the HD model and the MKZ hyperbolic model performance | 第160-162页 |
| 5.4 Comparison of the HD model and the MKZ model results | 第162-163页 |
| 5.5 A constitutive formula of nonlinear elasticity | 第163-169页 |
| 5.5.1 Identification of nonlinear model parameters | 第163-167页 |
| 5.5.2 Statistical evaluation of nonlinear model performance | 第167-169页 |
| 5.6 Prediction of the thermal conductivity of fiber-reinforced soil subjected to freeze-thaw cycles | 第169-185页 |
| 5.6.1 Introduction | 第169-172页 |
| 5.6.2 The physical statistical model | 第172-185页 |
| 5.7 Prediction of the Static triaxial behavior of fiber-reinforced soil subjected to freeze-thaw cycles using a hyperbolic model | 第185-210页 |
| 5.7.1 Introduction | 第185页 |
| 5.7.2 Hyperbolic stress-strain relations | 第185-188页 |
| 5.7.3 Determination of hyperbolic model parameters | 第188-189页 |
| 5.7.4 Linear regression parameters a and b | 第189-191页 |
| 5.7.5 Prediction of the nonlinear stress-strain relation of the unreinforced and the fiber-reinforced soil | 第191-208页 |
| 5.7.6 Statistical evaluation of the original hyperbolic model and modified hyperbolic model performance | 第208-210页 |
| 6 CONCLUSIONS AND RECOMMENDATIONS | 第210-224页 |
| 6.1 Technical Summary | 第210-215页 |
| 6.2 Application of studied fibers for the improvement of subgrade in eastern Turkey | 第215-217页 |
| 6.3 Discussion | 第217-218页 |
| 6.4 Conclusions | 第218-221页 |
| 6.5 Innovation points of this thesis | 第221-222页 |
| 6.6 Recommendations for future work | 第222-224页 |
| REFERENCES | 第224-242页 |
| 作者简历及攻读博士学位期间取得的研究成果 | 第242-244页 |
| 学位论文数据集 | 第244页 |
