LIST OF FIGURES
Figure Page
2.1 Well-Designed Pavement Deflection History Curve 18
2.2 Typical Annual Deflection History for a Flexible Pavement.... 20
2.3 Typical Output of a Dynamic Force Generator 22
2.4 Schematic Diagram of Impulse Load-Response Equipment 25
2.5 Characteristic Shape of Load Impulse 26
2.6 Comparison of Pavement Response from FWD and
Moving-Wheel Loads, a) Surface Deflections;
b) Vertical Subgrade Strains 28
2.7 Empirical Interpretation of Dynaflect Deflection
Basin, a) Basin Parameters; b) Criteria 34
2.8 Dynaflect Fifth Sensor Deflection-Subgrade
Modulus Relationship 40
2.9 Temperature Prediction Graphs, a) Pavements More
Than 2 in. Thick; b) Pavements Equal to or Less
Than 2 in. Thick 50
3.1 Typical Dynamic Force Output Signal of Dynaflect 57
3.2 Configuration of Dynaflect Load Wheels and Geophones
in Operating Position 58
3.3 Schematic of FWD Load-Geophone Configuration and
Deflection Basin 62
3.4 Schematic of Marchetti Dilatometer Test Equipment 69
4.1 Four-Layer Flexible Pavement System Model 72
4.2 Dynaflect Modified Geophone Positions 75
4.3 Typical Four-Layer System Used for the Sensitivity
Analysis 77
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