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A new interpretation of the constant rate of strain consolidation test for determining the coefficient of consolidation

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Abstract

This study presents a new method to determine the coefficient of consolidation from a constant rate of strain consolidation test. The method rests on the direct measurement of the total vertical stress applied at the top of a double drained clay specimen. For a sufficiently small time increment, the rate of stress is practically constant and is equivalent to a ramp-loading over the considered time interval. Consequently, a one dimensional consolidation theory was developed for the special case of a double-drained clay specimen subject to a constant rate of loading and having a constant \(c_\mathrm{{v}}\). The theory covers the full history of loading namely that of ramp-loading followed by post-ramp-loading. However to determine the coefficient of consolidation during a constant rate of strain test only the ramp-loading portion of the theory is required. The tests in this study revealed that an increase in the displacement rate produces a more rapid rise in the back-calculated value of the consolidation coefficient.

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Acknowledgements

The author acknowledges the technical support of Christian Juneau (Technicien en travaux d’enseignement et de recherche) of Département de génie civil et de génie des eaux, Université Laval for his work in the laboratory tests.

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  1. Département de génie civil et de génie des eaux, Université Laval, Pavillon Adrien-Pouliot, Québec, G1V 0A6, Canada

    Adolfo Foriero

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  1. Adolfo Foriero
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Correspondence to Adolfo Foriero.

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Foriero, A. A new interpretation of the constant rate of strain consolidation test for determining the coefficient of consolidation. J Eng Math 134, 7 (2022). https://doi.org/10.1007/s10665-022-10223-w

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