MODELING DAMAGE TO RIGID PAVEMENTS CAUSED BY SUBGRADE PUMPING

The efficient use of construction and maintenance resources requires the ability to effectively estimate and model subgrade pumping in rigid concrete pavements. The authors present a review of the evolution of a rigid pavement pumping model in this paper. An existing model is extended to account for the effects of climate and drainage conditions, as well as soil composition on pumping magnitudes. Additional changes allow the effect of nonconventional vehicle configurations to be considered in the calculation of pumping values. Finally, the process of computing pumping volumes and distributing void areas is altered to provide a more realistic effect. This improved model allows proposed designs to be analyzed to determine optimum pavement characteristics. The model is applied in a finite-element based method for analysis of pavements that also includes the effects of concrete cracking and fatigue. Urgent need for experimental data on the size and growth of voids beneath a pavement is noted.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00716488
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Feb 20 1996 12:00AM