Predicting End Bearing Capacity of Post-Grouted Drilled Shaft in Cohesionless Soils
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Volume 132, Issue 4
Abstract
Although pressure grouting beneath the tips of drilled shafts had been used successfully worldwide for close to , it has remained relatively unused in the United States in part due to the absence of a rational design procedure. Previous international usage relied predominantly upon experience and unpublished proprietary approaches. More recently, research aimed at quantifying the improvement that could be derived from postgrouting drilled shaft tips has resulted in a design methodology. This paper briefly discusses the postgrouting process and outlines the full scale test programs used to identify parameters affecting postgrouting performance. Correlations developed between applied grout pressure and end bearing improvement are presented along with a numerical example illustrating the design procedure.
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Acknowledgments
The writers would like to acknowledge the Florida Department of Transportation for funding this study with specific thanks extended to Mr. Peter Lai, the project monitor. Likewise, Auburn University and University of Houston as well as Applied Foundation Testing, Beck Foundation, Coastal Caisson, Driggers Engineering Services, EarthTech, and TreviIcos South are gratefully recognized for their contributions. Therein, Dr. Dan Brown, Dr. Michael O’Neill, Mr. Michael Muchard, Mr. Keith Anderson, Mr. Bud Khouri, Mr. Jaime Driggers, Mr. Ron Broderick, and Mr. Michael Rossie are extended the writers’ deepest thanks as well as Rudy, Ltd.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 132 • Issue 4 • April 2006
Pages: 478 - 487
Copyright
© 2006 ASCE.
History
Received: Mar 16, 2005
Accepted: Aug 11, 2005
Published online: Apr 1, 2006
Published in print: Apr 2006
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