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Shake table testing of liquefaction mitigation efficiency on pile foundations in sand stabilised with colloidal silica

Author

Listed:
  • Jiji Krishnan

    (Sardar Vallabhbhai National Institute of Technology
    Carmel College of Engineering & Technology)

  • Shruti Shukla

    (Sardar Vallabhbhai National Institute of Technology)

Abstract

Pile foundations in sands are susceptible to damage during earthquake-induced liquefaction. In the last decade, colloidal silica treatment in sand has been considered a novel technique to improve the properties of sand without disturbing the structure. The 1-g shaking table tests were performed in the current study to examine the liquefaction performance of the pile foundation in colloidal silica-treated sand. Colloidal silica treatment considerably reduces the pore water pressure ratio of sand. Moreover, the ground surface remained intact after shaking, and a minimal settlement was noticed in the case of all the relative density samples treated with colloidal silica. The colloidal silica ground improvement method is suitable to mitigate liquefaction damages during shaking events in sandy soils and guarantees the protection of structures during earthquakes and other shaking events. It is important to analyse the influence of water on the strength in order to get more insights into colloidal silica stabilised sites. The water table fluctuations of the field might change the strength of sand stabilised using weakly cemented colloidal silica. So, the current study also aims to demonstrate the effect of variations in strength with the fluctuation of the water table in colloidal silica-treated sand. Treating the sand layers with an optimal amount of colloidal silica reduces pore water pressure ratio and settlement in all relative density samples. The treatment with colloidal silica slowdowns the maximum settlement time for all the tests conducted.

Suggested Citation

  • Jiji Krishnan & Shruti Shukla, 2022. "Shake table testing of liquefaction mitigation efficiency on pile foundations in sand stabilised with colloidal silica," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 111(3), pages 2317-2341, April.
    • Handle: RePEc:spr:nathaz:v:111:y:2022:i:3:d:10.1007_s11069-021-05139-0
    DOI: 10.1007/s11069-021-05139-0
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    References listed on IDEAS

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    1. Bin Ye & Guanlin Ye & Weimin Ye & Feng Zhang, 2013. "A pneumatic shaking table and its application to a liquefaction test on saturated sand," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 66(2), pages 375-388, March.
    2. Yu Huang & Zhuoqiang Wen, 2015. "Recent developments of soil improvement methods for seismic liquefaction mitigation," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 76(3), pages 1927-1938, April.
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