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Cyclic Pore Pressure Generation, Dissipation and Densification in Granular Mixes

Author

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  • S. Thevanayagam

    (University at Buffalo, USA)

  • T. Shenthan

    (Advanced Earth Sciences Inc., USA)

Abstract

Knowledge of cyclic load induced pore pressure generation, post-liquefaction dissipation and volumetric densification characteristics of sands, silty sands, and silts are important for the analysis of performance of loose saturated granular deposits in seismic areas. This article presents results from an experimental study of these characteristics for such soils containing 0 to 100% non-plastic silt. Pore pressure generation characteristics are studied using undrained cyclic triaxial tests. Pre- and post-liquefaction compressibility and coefficient of consolidation, and post-liquefaction volumetric densification characteristics are determined from consolidation data prior to cyclic tests and pore pressure dissipation tests following undrained cyclic tests. Effects of fines content on these characteristics compared to those of clean sands are examined in the context of intergranular void ratio and intergranular contact density concepts.

Suggested Citation

  • S. Thevanayagam & T. Shenthan, 2010. "Cyclic Pore Pressure Generation, Dissipation and Densification in Granular Mixes," International Journal of Geotechnical Earthquake Engineering (IJGEE), IGI Global, vol. 1(1), pages 42-61, January.
    • Handle: RePEc:igg:jgee00:v:1:y:2010:i:1:p:42-61
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