Influence Zone for End Bearing of Piles in Sand
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 132, Issue 9
Abstract
An attempt is made to establish an analytically based estimate of the influence zone surrounding the tip of a loaded pile in sand. In the framework of the cavity expansion theory and a confined local failure mechanism, explicit expressions are derived in which the sizes of the upward and downward influence zones are properly linked with the angle of shearing resistance, the stiffness, the volumetric strain, and the mean effective stress of the sand at the pile tip. Based on a series of parametric analyses, the mean range of the influence zone is suggested. For piles in clean sand, the influence zone above the pile tip is between 1.5 and and the zone below the tip ranges from 3.5 to , where is pile diameter. For piles in more compressible silty sand, the influence zone extends between 0.5 and above the pile tip and between 1.5 and below the tip. Because of its analytical nature, the present study may provide a meaningful insight into the current empirical interpretations.
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Acknowledgment
The work described in this paper was supported by the Research Grants Council of Hong Kong (Grant No. UNSPECIFIEDG-HK032/04). This support is gratefully acknowledged.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 132 • Issue 9 • September 2006
Pages: 1229 - 1237
Copyright
© 2006 ASCE.
History
Received: Dec 30, 2004
Accepted: Mar 20, 2006
Published online: Sep 1, 2006
Published in print: Sep 2006
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