Linear Representation of Steady-State Line for Sand
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 124, Issue 12
Abstract
The steady-state line relates the effective confining pressure (p′) with the void ratio (e) of a soil during steady-state deformation. The line is commonly plotted in an e–log p′ plane and is treated as a straight line in that plane. However, it has long been observed that the steady-state lines for cohesionless soils are in general curved in the e–log p′ plane, and treating them as straight lines is done only for simplicity. As an alternative, this note suggests the steady-state lines of cohesionless soils be plotted in the e–(p′/pa)α plane, where pa is the atmospheric pressure serving as a reference pressure for normalization, and α is a number around 0.7 that can be fine tuned for optimization. It is shown in the note that the steady-state lines of sand are nearly straight in the e–(p′/pa)α plane, and the straightness is insensitive to the parameter α. This note presents the consideration behind the choice of the plane and demonstrates the straightening effects by examples.
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Copyright © 1998 American Society of Civil Engineers.
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Published online: Dec 1, 1998
Published in print: Dec 1998
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