Well-known statistical techniques are used to formulate mathematical expressions for the stress-strain response of soil subjected to a uniaxial strain test. A special mold was used to compact 28 soils at three different densities, and uniaxial strain tests were performed on each sample. A parabolic relationship, a hyperbolic equation, and an exponential formulation are used to describe the measured stress-strain response, and the associated coefficients are assumed to be linear functions of the normalized soil parameters. Among these formulations, the exponential equation is most accurate. The relationship between the constrained modulus and the stress level is also described by several equations in which the coefficients are linear functions of the normalized soil parameters, and the modified Janbu equation is found to yield the best results. The parameters that exert the greatest influence on the constrained modulus are associated with densities, and, if the approximations assumed here are accepted, this modulus can be estimated from the results of standard laboratory compaction tests and field density measurements without an expensive series of tests.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 59-68
  • Monograph Title: Pavement and soil characteristics
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00126820
  • Record Type: Publication
  • ISBN: 0309023882
  • Files: TRIS, TRB
  • Created Date: Dec 16 1975 12:00AM