Proposed Enhancements to Pavement ME Design: Improved Consideration of the Influence of Subgrade and Unbound Layers on Pavement Performance (2019) / Chapter Skim
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I-1 Appendix I Subgrade Subroutine for Flexible and Rigid Pavements The subgrade subroutine is used to produce the modulus of subgrade, which is both stress dependent and moisture dependent.
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I-2 Figure I.1. GIS Map of Vegetation Cover.
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I-3 The Fredlund and Xing equation is used to estimate the relationship between matric suction and water content and expressed as: 1 ln (I.5)
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I-4 where is the resilient modulus (unit is MPa) ; is first invariant of the stress tensor (kPa)
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I-5 Figure I.2. Flowchart of Incorporating the Subgrade Models into Pavement ME Design for Flexible and Rigid Pavements.
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