Case History: Capacity of a Drilled Shaft in the Atlantic Coastal Plain
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 133, Issue 5
Abstract
This paper presents a single case history of a drilled shaft constructed in the Atlantic Coastal Plain deposits for a bridge foundation that was subjected to axial loading. The predicted nominal axial capacity is estimated based on state of practice empirically derived methods specified in the current AASHTO LRFD Bridge Design Specifications. Predictions are compared to observed soil resistance derived from a static load test conducted on a full-size instrumented test shaft using the Osterberg Cell method. The results suggest that the AASHTO specified prediction methods should be applied cautiously for drilled shafts in the Atlantic Coastal Plain, incorporating an appropriate in situ testing program for evaluating soil design parameters, considering variations from the specific geologic environment and construction methodology used to develop the specified prediction methods, accounting for the load-deformation behavior of the shaft, and providing for instrumented static load testing to measure the actual behavior of the drilled shafts.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writer gratefully acknowledges the assistance and cooperation of Jack Mansfield, P.E., and Kuang Yu Yang, P.E. of the NJDOT Geotechnical Engineering Unit; Rick Usab, P.E. of Loadtest, Inc.; and Joseph Alonge, P.E. of Hardesty and Hanover, LLP in permitting use of the data reported herein and providing a review and helpful comments during the preparation of this manuscript.
References
AASHTO. (2004). AASHTO LRFD bridge designs Specifications—SI units. 3rd Ed. Washington, D.C.,
Lewis, J. V., and Kummel, H. B. (1914). The geology of New Jersey. (revised and rewritten by H. B. Kummel, 1938–1940).
Liao, S., and Whitman, R. V. (1986). “Overburden correction factors for SPT in sand.” J. Geotech. Engrg., 112(3), 373–377.
Seed, H. B., Tokimatsu, K., Harder, L. F., and Chung, R. M. (1985). “Influence of SPT procedures in soil liquefaction resistance evaluations.” J. Geotech. Engrg., 111(12), 1425–1445.
Simpson, R. (2003). “Data report on drilled shaft load testing (Osterberg method).” Project No. LT-8887-2, Loadtest Inc., Gainesville, Fla.
Zapecza, O. S. (1984). “Hydrogeologic framework of the New Jersey coastal plain.” USGS Open-File Report 84-730, U.S. Geological Survey, 61, Trenton, N.J.
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 133 • Issue 5 • May 2007
Pages: 522 - 530
Copyright
© 2007 ASCE.
History
Received: Feb 28, 2006
Accepted: Jul 18, 2006
Published online: May 1, 2007
Published in print: May 2007
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.