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Improvement of a hypoplastic model to predict clay behaviour under undrained conditions

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Abstract

A shortcoming of the hypoplastic model for clays proposed by the first author is an incorrect prediction of the initial portion of the undrained stress path, particularly for tests on normally consolidated soils at isotropic stress states. A conceptually simple modification of this model, which overcomes this drawback, is proposed in the contribution. The modified model is applicable to both normally consolidated and overconsolidated soils and predicts the same swept-out-memory states (i.e., normal compression lines) as the original model. At anisotropic stress states and at higher overconsolidation ratios the modified model yields predictions similar to the original model.

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Acknowledgments

The first author highly appreciates valuable discussion of this topic with Dr. Wenxiong Huang, who also kindly provided digitised data on Fujinomori Clay. The first author further acknowledges financial support by the research grants GAAV IAA200710605 and MSM 0021620855.

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Authors and Affiliations

  1. Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Charles University, Albertov 6, 12843, Prague 2, Czech Republic

    David Mašín

  2. Institute of Geotechnical Engineering, Technische Universität Dresden, 01062, Dresden, Germany

    Ivo Herle

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  1. David Mašín
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  2. Ivo Herle
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Correspondence to David Mašín.

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Mašín, D., Herle, I. Improvement of a hypoplastic model to predict clay behaviour under undrained conditions. Acta Geotech. 2, 261–268 (2007). https://doi.org/10.1007/s11440-007-0043-y

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  • DOI: https://doi.org/10.1007/s11440-007-0043-y

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