Post-liquefaction reconsolidation of sand
Proceedings of the Royal Society of London Series A - Mathematical, Physical and Engineering Sciences
Royal Society Publishing
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Adamidis, O., & Madabhushi, G. Post-liquefaction reconsolidation of sand. Proceedings of the Royal Society of London Series A - Mathematical, Physical and Engineering Sciences, 472 https://doi.org/10.1098/rspa.2015.0745
Loosely packed sand that is saturated with water can liquefy during an earthquake, potentially causing significant damage. Once the shaking is over, the excess pore water pressures that developed during the earthquake gradually dissipate, while the surface of the soil settles, in a process called post-liquefaction reconsolidation. When examining reconsolidation, the soil is typically divided in liquefied and solidified parts, which are modelled separately. The aim of this paper is to show that this fragmentation is not necessary. By assuming that the hydraulic conductivity and the one-dimensional stiffness of liquefied sand have real, positive values, the equation of consolidation can be numerically solved throughout a reconsolidating layer. Predictions made in this manner show good agreement with geotechnical centrifuge experiments. It is shown that the variation of one-dimensional stiffness with effective stress and void ratio is the most crucial parameter in accurately capturing reconsolidation.
External DOI: https://doi.org/10.1098/rspa.2015.0745
This record's URL: https://www.repository.cam.ac.uk/handle/1810/253225