Mechanisms of Shaft Friction in Sand from Instrumented Pile Tests
Publication: Journal of Geotechnical Engineering
Volume 119, Issue 1
Abstract
Comprehensive measurements of the effective stresses developed during the installation, equalization, and load testing of displacement piles in a loose to medium dense quartz sand are presented. The results shed new light on the mechanisms that control shaft friction in sand. First, it is demonstrated directly that the stresses developed at any given soil horizon depend strongly on both the distance of that horizon from the pile tip and the soil's initial state. Second, pile loading is shown to induce radial effective stress changes associated with the soil fabric set up by installation and dilation phenomena at pile‐soil interface. Thirdly, the operational angles of interface friction are found to be constant volume values that correlate well with the results from laboratory interface shear tests.
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Information & Authors
Information
Published In
Journal of Geotechnical Engineering
Volume 119 • Issue 1 • January 1993
Pages: 19 - 35
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jun 1, 1991
Published online: Jan 1, 1993
Published in print: Jan 1993
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