REINFORCEMENT OF TRANSPORTATION SUPPORT SYSTEMS THROUGH FABRIC PRESTRESSING

This paper investigates the mechanism of fabric reinforcement of transportation support systems in which significant rutting during the service life of the system is unacceptable, in particular, the concept of fabric prestressing. An analysis is used that incorporates the finite-element method, the nonlinear stress-strain properties of granular and subgrade soils, and stiffness (i.e., tension modulus), creep, and frictional properties of the fabric. Results of such an analysis performed on a two-layer system that consists of a granular base over a soft-clay subgrade indicate that prestressed fabrics would reduce resilient deformations or vertical stresses in the subgrade. Fabric prestressing can be applied to improve the shear strength and load-deformation behavior of granular layers in transportation support systems. The allowable prestressing tension in the fabric is limited by fabric slippage relative to adjacent soil layers or passive failure in the granular layer. Although more experimental work is required to verify analytical predictions of the beneficial effects of fabric prestressing, it appears that this concept will improve the performance of transportation support systems under applied traffic loads. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 49-51
  • Monograph Title: Evaluation and analysis of flexible pavement components and properties
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00322997
  • Record Type: Publication
  • ISBN: 0309030684
  • Files: TRIS, TRB
  • Created Date: Apr 15 1981 12:00AM