Behavior of Friction Piles in Mexico City Clay
Publication: Journal of Geotechnical Engineering
Volume 116, Issue 6
Abstract
Results of cyclic‐ and quasi‐static load tests carried out on concrete piles driven in Mexico City clay shed light on significant features of the behavior of floating piles under earthquake‐like conditions. The maximum bearing capacity depends on the rate of loading: the higher the rate, the higher the capacity. The rate of loading has a similar effect on the slope of the land versus displacement P‐δ curve. The modulus of reaction under vertical cyclic load is constant over a wide range of cyclic‐load amplitudes. Pile penetration is small whenever the total applied load (sustained plus cyclic) does not exceed a threshold load approximately equal to the bearing capacity defined by conventional procedures. If critical load is surpassed, increasingly larger pile penetrations occur and pile capacity loss may follow. Results of cyclic simple shear tests on undisturbed clay samples show the existence of a stress limit beyond which the induced shear strains increase at higher rates. The clay loses about half of its original undrained strength after being remolded at constant volume.
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Information & Authors
Information
Published In
Journal of Geotechnical Engineering
Volume 116 • Issue 6 • June 1990
Pages: 915 - 931
Copyright
Copyright © 1990 ASCE.
History
Published online: Jun 1, 1990
Published in print: Jun 1990
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