Proposed Enhancements to Pavement ME Design: Improved Consideration of the Influence of Subgrade Soils Susceptible to Shrink/Swell and/or Frost Heave on Pavement Performance
| 项目名称： | Proposed Enhancements to Pavement ME Design: Improved Consideration of the Influence of Subgrade Soils Susceptible to Shrink/Swell and/or Frost Heave on Pavement Performance |
| 摘要： | Expansive clay soils that are susceptible to shrink and swell, and silty soils that are susceptible to frost heave are found in many parts of the United States. At these locations, these soils serve as the subgrade of the pavement structure. The AASHTOWare Pavement ME Design (formerly DARWin-ME) and the AASHTO Mechanistic-Empirical Pavement Design Guide Manual of Practice (MEPDG) provide a methodology for the analysis and performance prediction of new and rehabilitated pavements. Although the performance of these pavements is known to be closely related to properties of the subgrade, the performance predicted by this methodology does not adequately consider the influence of subgrade soils susceptible to shrink/swell and/or frost heave on pavement performance. There is a need to evaluate the procedures contained in the Pavement ME Design and identify or develop enhancements (in the form of modified or new models) to ensure that the procedures appropriately account for the influence of these types of subgrade soils on the performance of new and rehabilitated pavements. Incorporating these enhancements into the Pavement ME Design procedures will allow an improved analysis and design of pavement structures. The objective of this research is to propose enhancements, as needed, to the Pavement ME Design procedures to better reflect the influence of subgrade soils susceptible to shrink/swell and/or frost heave on pavement performance. These enhancements shall include modifications of the models contained in the Pavement ME Design and/or the development of new models. The research shall address all new and rehabilitated pavement types included in Pavement ME Design. |
| 状态： | Active |
| 资金： | 500000 |
| 资助组织： | Federal Highway Administration |
| 项目负责人： | Jared, David |
| 执行机构： | Arizona State University, Tempe |
| 主要研究人员： | Zapata, Claudia E |
| 开始时间： | 20180815 |
| 预计完成日期： | 20210514 |
| 实际结束时间： | 0 |
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