‐Coefficient of Sand in Triaxial Apparatus
Publication: Journal of Geotechnical Engineering
Volume 110, Issue 4
Abstract
Two series of Ko tests were carried out on sand using the triaxial apparatus and lateral strain indicator. Jaóky's formula for the coefficient of earth pressure at rest KoNC (normally consolidated soils) was affirmed for dense samples only. The initial hydrostatic consolidation of samples decreased the dispersion of test results but increased the measured KoNC- value. Consequently, the Ko-strain path must be followed right from the beginning of testing. A deformation theory of KoNC is developed using Rowe's stress-dilitancy relation and oedometrically measured total and reversible axial strain increments. For overconsolidated samples, a power-law dependence of KoOC on the overconsolidation ratio OCR was found valid for a limited range of OCR. For very high OCR values, KoOC decreases. Maximum KoOC value corresponds to the Rankine coefficient of passive earth pressure. Initial porosity of samples is not the only structural parameter governing the behavior of samples.
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References
1.
Bishop, A. W., and Henkel, D. J., The Measurement of Soil Properties in the Triaxial Test, 2nd ed., J. Arnold, London, 1962.
2.
Feda, J., “Jednoosá stlačitelnost zbraslavského písku” (Uniaxial Compressibility of Zbraslav Sand—in Czech), Stavebnícky časopi, Bratislava, Vol. 24, No. 8, Aug., 1976, pp. 614–639.
3.
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4.
Jáky, J., “A nyugalmi byomás tényezöhe” (The Coefficient of Earth Pressure at Rest—in Hungarian), A Magyar Mérnök‐ és Épitész‐Egylet Közlönye, Vol. 78, No. 22, 1944, pp. 355–358.
5.
Lade, P. V., “Localization Effects in Triaxial Tests on Sand,” Deformation and Failure of Granular Materials, P. A. Vermeer and H. J. Luger, eds., Symposium of the International Union of Theoretical and Applied Mechanics, Delft, A. A. Balkema, Rotterdam, 1982, pp. 461–471.
6.
Mayne, P. W., and Kulhawy, F. H., “‐OCR Relationships in Soils,” Journal of the Geotechnical Engineering Division, ASCE, Vol. 108, No. 6, June, 1982, pp. 851–872.
7.
Rowe, P. W., “A Stress‐Strain Theory for Cohesionless Soil with Applications to Earth Pressures at Rest and Moving Walls,” Géotechnique, London, Vol. 4, No. 2, 1954, pp. 70–88.
Information & Authors
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Published In
Journal of Geotechnical Engineering
Volume 110 • Issue 4 • April 1984
Pages: 519 - 524
Copyright
Copyright © 1984 ASCE.
History
Published online: Apr 1, 1984
Published in print: Apr 1984
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