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Shaking table tests on seismic performance of shallow foundations resting on partially saturated sands

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Abstract

Induced partial saturation using chemical substances is an innovative technique to mitigate liquefaction inflicted damage. Despite being a promising method, there is little research on its application beneath shallow foundations, and its effects on the settlement behavior have yet to be elucidated. In this study, the powder of denture cleanser, containing hydrogen peroxide, was mixed with dry sand in different proportions. Gas bubbles were generated in the pore spaces as the sand-chemical mixtures were saturated with water, producing partially saturated samples at varying degrees of saturation in the range of 79.5 to 98%. A series of 1-g shaking table tests were conducted on nearly and partially saturated sand models with relative densities ranging from 33.5 to 76.3%. Detailed analysis of the experimental data indicated that foundation settlements and excess pore pressures developed in partially saturated sand models were smaller than those in nearly saturated counterparts. The reduction in the settlement was more prominent at lower degrees of saturation, lower relative densities, and higher stress levels. These results highlight that chemically generated gas bubbles may be an effective practical method of reducing the liquefaction-induced settlements that shallow foundations suffer in the event of an earthquake.

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Acknowledgements

The author would like to thank Professor Gopal Madabhushi for kindly authorizing the use of the shaking table and for his useful recommendations. The technical support of the staff at the Schofield Centre of Cambridge University and Civil Engineering Laboratory of Mus Alparslan University is also gratefully acknowledged.

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Correspondence to Abdülhakim Zeybek.

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The authors declare no competing interests.

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Responsible Editor: Zeynal Abiddin Erguler

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Zeybek, A. Shaking table tests on seismic performance of shallow foundations resting on partially saturated sands. Arab J Geosci 15, 774 (2022). https://doi.org/10.1007/s12517-022-10032-6

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  • DOI: https://doi.org/10.1007/s12517-022-10032-6

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