Liquefaction Mechanism for Layered Soils
Publication: Journal of Geotechnical Engineering
Volume 120, Issue 4
Abstract
Results from four centrifuge model tests are presented. Three of the model tests involve layered soil deposits subject to base shaking; one model test involves a uniform soil deposit of sand subject to base shaking. The layered soil models consisted of fine sand overlain by a layer of relatively impermeable silica flour (silt). Pore‐water pressures, accelerations, and settlements were measured during all four tests. Results from the model tests involving layered soils suggest that during liquefaction a water interlayer or very loose zone of soil may develop at the sand‐silt interface due to the difference in permeabilities. In each layered model test, boils were observed on the surface of the silt layer. These boils were concentrated in the thinnest zones of the overlying silt layer and provided a vent for the excess pore‐water pressure generated in the fine sand.
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Information & Authors
Information
Published In
Journal of Geotechnical Engineering
Volume 120 • Issue 4 • April 1994
Pages: 737 - 755
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Feb 28, 1992
Published online: Apr 1, 1994
Published in print: Apr 1994
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