CUED Publications database

Post-liquefaction reconsolidation of sand

Adamidis, O and Madabhushi, GSP (2016) Post-liquefaction reconsolidation of sand. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 472. 20150745-. ISSN 1364-5021

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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.

Item Type: Article
Uncontrolled Keywords: porous media flow reconsolidation soil liquefaction
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:54
Last Modified: 05 Aug 2021 05:35
DOI: 10.1098/rspa.2015.0745