Relationship between Texas Cone Penetrometer Tests and Axial Resistances of Drilled Shafts Socketed in Clay Shale and Limestone
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 136, Issue 8
Abstract
Modern methods for designing drilled shafts in soft rock require knowledge of the compressive strength and modulus of the rock. However, rock jointing at many sites prohibits the recovery of samples of sufficient length and integrity to test rock cores in either unconfined or triaxial compression tests. Since rational design procedures usually require values of compressive strength, surrogate methods must be employed to estimate the compressive strength of the rock. The surrogate methods considered in this study was Texas cone penetrometer tests, and performed at several sites in North Central Texas. In order to develop the relationships between Texas cone penetrations and side and base resistances of rock socketed drilled shafts, three field load tests were conducted. Based on the field study and literature reviews, a relationship between Texas cone penetration tests and axial resistances of rock socketed drilled shafts was proposed.
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Acknowledgments
The authors will forever be grateful to the late Dr. Michael W. O’Neill (1940–2003) for his numerous contributions to our research project and feel honored to have worked with him very closely. May his soul rest in peace. Most of the sampling and testing work reported here was funded by the Texas Department of Transportation as a part of a larger research project to improve the design of drilled foundations in soft rock.
References
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 136 • Issue 8 • August 2010
Pages: 1161 - 1165
Copyright
© 2010 ASCE.
History
Received: Mar 3, 2008
Accepted: Jan 1, 2010
Published online: Jul 15, 2010
Published in print: Aug 2010
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