Knowledge of cumulative plastic deformation and failure mechanisms for fine-grained soils under repeated loading is crucial for the proper design and maintenance planning of highway pavements and railroad tracks. Improvements to existing methods for predicting cumulative plastic deformation for fine-grained subgrade soils have been made. The soil deviator stress, number of stress applications, soil physical state, and soil type are considered. The improved method incorporates multilevels of deviator stresses and multisoil physical states that result from load-level variations, as well as seasonal and weather changes throughout traffic. The authors present measurements of plastic deformation for a railroad-track subgrade and reveal a significant influence of soil physical state, soil type, traffic tonnage, and wheel loads on the accumulation of plastic deformation. The predicted and experimental results are compared and the improved method shows good applicability.


  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 1006-013
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00730038
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jan 1 1997 12:00AM