PROBABILISTIC ANALYSIS OF RANDOMLY DISTRIBUTED FIBER-REINFORCED SOIL

The authors performed a series of triaxial compression tests on cohesionless soils reinforced with discrete, randomly distributed fibers--both synthetic and natural--to examine the influence of fiber characteristics, soil characteristics and density, and confining stress on shear strength of reinforced soils. A mathematical model was developed from a regression analysis of test results to amplify the effect of these factors on the shear strength of reinforced soil. The model approximates the strength of soils reinforced with any type of fiber and under given stress environments. The model approximations are in good agreement with the experiment results and the results published in the literature. It was found that the failure envelopes of soil-fiber composites have a curvilinear failure envelope, with a transition occurring at a certain confining stress, known as "critical confining stress," below which the fibers tend to slip. The fiber aspect ratio affects the amount of critical confining stress. The shear strength of soil increases significantly with fiber inclusion. The increase in strength is a function of fiber weight fraction, aspect ratio, and soil grain size.

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 419-426
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00726081
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 20 1996 12:00AM