Criterion for Rock Mass
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 135, Issue 1
Abstract
Drilled shafts socketed in rock mass have been used frequently as a foundation system to support both vertical and lateral loads. Traditionally, the lateral interaction between the drilled shaft and the surrounding rock medium has been characterized by means of nonlinear curves; however, there is a lack of well verified criterion for rock mass. In this paper, a hyperbolic criterion is developed based on both theoretical derivations and numerical (finite element) parametric analysis results. The methods for determining pertinent rock parameters needed for constructing the proposed curves are presented in the paper. Two full-scale lateral load tests on large diameter, fully instrumented drilled shafts socketed in rock conducted by the writers, together with additional four load test results reported by Gabr et al. were used to validate the applicability of the proposed hyperbolic curves for rock mass. The comparisons between the computed shaft responses (both deflections and bending moments) and the actual measured responses are considered acceptable.
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Acknowledgments
The paper is part of research sponsored by the Research and Development Office of the Ohio Department of Transportation (DOT). The writers would like to acknowledge the support of Jawdat Siddiqi and Teddy Antonios of Ohio DOT.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 135 • Issue 1 • January 2009
Pages: 26 - 36
Copyright
© 2009 ASCE.
History
Received: Jul 29, 2005
Accepted: May 2, 2008
Published online: Jan 1, 2009
Published in print: Jan 2009
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