臺灣博碩士論文加值系統

In the past decade, numerous studies have shown that incorporating geogrid in the pavement could effectively improve the pavement performance. Pavement performance is usually measured in terms of individual pavement distress such as rutting, crack, etc. The major benefit of using geogrid in the flexible pavement is to improve its rutting performance as the result of the reinforcement function of geogrid. Mechanical-Empirical Pavement Design Guide (M-E PDG) developed under the National Corporative Highway Research Program (NCHRP) is a powerful tool to analysis and design of flexible pavement. In addition, one important feature of M-E PDG is its capability to provide the pavement performance prediction throughout its design life. However, at this point, M-E PDG is not able to consider the effect of incorporating geogrid in the flexible pavement.
In this study, a design procedure was proposed to obtain an equivalent geogrid pavement structure, which satisfies M-E PDG design input requirements. In this procedure, a 2-D finite element method was used to simulate geogrid reinforced and non-reinforced pavement structures. The iteration process based on stress-strain analysis of finite element model was then used to obtain an equivalent structure inputs for M-E PDG. The geogrid reinforced rutting performance can then be predicted by analyzing the equivalent geogrid structure using M-E PDG software. A significant life improvement of pavement with geogrid was observed compared to pavement without geogrid

ACKNOWLEDGMENT II
ABSTRACT III
TABLE OF CONTENT IV
LIST OF FIGURE VII
LIST OF TABLE IX
NOMENCLATURE X
CHAPTER 1 INTRODUCTION 1
1.1 Introduction 1
1.2 Problem Statement 3
1.3 Research Objective 3
1.4 Hypothesis 3
1.5 Research Approach 4
1.6 Thesis Scope 4
CHAPTER 2 LITERATURE REVIEW 6
2.1 Flexible pavement 6
2.2 Geosynthetic 7
2.2.1 Geogrid 8
2.2.2 Function of Geogrid 10
2.3 Reinforcement Due To Geogrid 11
2.3.1 Laboratory and Field Studies 11
2.3.2 Numerical Studies 14
2.4 Pavement Design Methodology 19
2.4.1 The History of Pavement Design Method 19
2.4.2 Mechanical-Empirical Pavement Design Guide 22
2.4.2.1 M-E PDG Response Model 25
2.4.2.2 M-E PDG Damage Model 26
CHAPTER 3 SIMULATE EFFECT OF GEOGRID IN MEPDG 33
3.1 Finite Element Consideration 33
3.1.1 Material Properties 33
3.1.1.1 Hot Mix Asphalt 33
3.1.1.2 Base Course and Subgrade 34
3.1.1.3 Geogrid 35
3.1.2 Finite Element Modeling 36
3.1.3 Geometry of Pavement 37
3.2 Equivalent Structure for Geogrid Reinforced Pavement 38
3.3 Case Study of Evaluating Performance of Geogrid Secondary Road 43
3.3.1 Pavement Structure for Secondary Road 43
3.3.2 Evaluation Performance of Secondary Pavement Structure 44
CHAPTER 4 RESULT AND DISCUSSION 46
4.1 Effect of Geogrid on Flexile Pavement Response 46
4.2 Equivalent Structure for Geogrid Reinforced Flexible Pavement 50
4.3 Evaluation performance of geogrid reinforced secondary road by M-E PDG 55
CHAPTER 5 CONCLUSIONS AND FUTURE SUGGESTIONS 70
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