Development of a Mechanistic-based Design Method for Geosynthetics-reinforced Pavement on Expansive Soils

Expansive soils cause a significant hazard to pavements and light building foundations. During periods of high moisture, expansive soils will swell underneath pavement structure, and during periods of very dry season in which soil moisture dramatically falls, expansive soils will shrink and can result in significant contractive deformation. These cycles of swell and/or shrinkage can lead to pavement cracking. Shrinkage due to water content loss in the soils frequently causes longitudinal pavement cracks This project extends the current Southern Plains Transportation Center (SPTC) project by characterizing local expansive soils, developing methods to predict soil heaves and calculate induced stresses in pavements and shallow foundations. An easily implementable model will be developed on the basis of the theory of Timoshenko beam on elastic foundation, in which the mechanism of soil strength and stiffness enhancements from geosynthetics is mathematically considered. As compared with the traditional finite element models, the proposed analytical model will be significantly simple and more easily implemented. The closed-form solutions make pavement stress analyses and soil heave predictions separate.


    • English


    • Status: Active
    • Contract Numbers:

      SPTC 15.1-23/DTRT13-G-UTC36

    • Sponsor Organizations:

      Office of the Assistant Secretary for Research and Technology

      University Transportation Centers Program
      Department of Transportation
      Washington, DC  United States  20590
    • Managing Organizations:

      Southern Plains Transportation Center

      University of Oklahoma
      201 Stephenson Pkwy, Suite 4200
      Norman, OK  United States  73019
    • Performing Organizations:

      Louisiana Tech University, Ruston

      Ruston, LA  United States  71272
    • Principal Investigators:

      Wang, Jay

    • Start Date: 20160301
    • Expected Completion Date: 20180630
    • Actual Completion Date: 0
    • USDOT Program: University Transportation Centers Program

    Subject/Index Terms

    Filing Info

    • Accession Number: 01607672
    • Record Type: Research project
    • Source Agency: University of Oklahoma, Norman
    • Contract Numbers: SPTC 15.1-23/DTRT13-G-UTC36
    • Files: UTC, RiP
    • Created Date: Aug 17 2016 1:46PM