Seismic Behavior of Cantilever Retaining Walls with Liquefiable Backfills
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 127, Issue 5
Abstract
A series of centrifuge tests were conducted to investigate the seismic behavior of fixed-base, cantilever, retaining walls supporting saturated, liquefiable, cohesionless backfills. Accelerations, bending strains, deflections, and lateral earth pressures were measured on the walls. Accelerations, pore pressures, and surface settlements were measured in the soil. Parametric studies investigating effects of wall stiffness and magnitude of shaking on the wall-soil behavior were conducted. The magnitude and distribution of lateral earth pressures were determined. Experimental results demonstrated that excess pore pressures in liquefiable backfills contribute significantly to seismic, lateral, earth pressures. It was shown that the average rise in the dynamic thrust is well correlated to the excess pore pressures in the backfill but is insensitive to the range of wall stiffness. It was found that simple calculations, based on Coulomb's active earth pressure theory, can be used to estimate the dynamic thrust at the end of shaking, when backfill liquefies completely. The location of the line of action of the total static lateral thrust was approximately two-thirds of the wall height from the top. During shaking, this distance varied between 0.6 and 0.8 of the wall height.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 127 • Issue 5 • May 2001
Pages: 424 - 435
History
Received: Sep 30, 1999
Published online: May 1, 2001
Published in print: May 2001
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