STATISTICAL ANALYSIS OF CONSTRAINED SOIL MODULUS

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.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1975/537/537-006.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=STATISTICAL+ANALYSIS+OF+CONSTRAINED+SOIL+MODULUS&author=J.+Espinosa&author=R.+Krizek&author=R.+Corotis&publication_year=1975
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Subsurface Soil-Structure Interaction and Committee on Soil and Rock Properties. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Espinosa, Jose H Salazar
  • Krizek, Raymond J
  • Corotis, Ross B
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1975

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 59-68
• Monograph Title: Pavement and soil characteristics
• Serial:
  • Transportation Research Record
  • Issue Number: 537
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Deformation curve; Equations; Field density; Mechanical strain; Mechanical tests; Modulus of elasticity; Soil compaction test; Soils; Statistical analysis; Stresses
• Old TRIS Terms: Compaction tests; Uniaxial strain; Uniaxial testing
• Subject Areas: Data and Information Technology; Geotechnology; Highways;

Filing Info

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