Ultimate Uplift Capacity of Multiplate Helical Type Anchors in Clay
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 137, Issue 7
Abstract
In recent years, the use of helical anchors has expanded beyond their traditional use in the electrical power industry. The advantages of rapid installation and immediate loading capability have resulted in their being used in more traditional civil engineering infrastructure applications. Unfortunately, our current understanding of these anchors is unsatisfactory, and the underlying theoretical framework adopted by engineers has proven to be largely inappropriate and inadequate. A better understanding of helical anchor behavior will lead to increased confidence in design, a wider acceptance as a foundation alternative, and more economic and safer designs. The primary aim of this research is to use numerical modeling techniques to better understand multiplate circular anchor foundation behavior in clay soils. A practical design framework for multiplate anchor foundations will be established to replace existing semiempirical design methods that are inadequate and have been found to be excessively under- or overconservative. This framework can then be used by design engineers to confidently estimate the pullout capacity of multiplate anchors under tension loading.
Get full access to this article
View all available purchase options and get full access to this article.
References
Das, B. M. (1978). “Model tests for uplift capacity of foundations in clay.” Soils Found., 18(2), 17–24.
Das, B. M. (1980). “A procedure for estimation of ultimate uplift capacity of foundations in clay.” Soils Found., 20(1), 77–82.
Hoyt, R. M., and Clemence, S. P. (1991). “Uplift capacity of helical anchors in soil.” Proc., 12th Int. Conf. on Soil Mechanics and Foundation Engineering [Comptes Rendus du Congres International de Mecanique des Sols et des Travaux de Fondations], Vol. 2, A. A. Balkema Publishers, Rotterdam, Netherlands, 1019–1022.
Hubbell, Inc. (2003). “Helical screw foundation system design manual for new construction.” A. B. Chance Div., Hubbell, Inc., Centralia, MO. 〈http://www.vickars.com/screwpile_manual/index.html〉 (May 25, 2011).
Kulhawy, F. H. (1985). “Uplift behavior of shallow soil anchors—An overview,” Proc., ASCE Convention, Uplift Behavior of Anchor Foundations in Soil, ASCE, New York, 1–25.
Lutenegger, A. J., Smith, B. L., and Kabir, M. G. (1988). “Use of in situ tests to predict uplift performance of multihelix anchors.” Special topics in foundations (GSP 16), ASCE, New York, 93–110.
Magnum Piering, Inc. (2004). “Magnum helix foundation technical reference manual.” West Chester, OH. 〈http://www.magnumpiering.com/shared/content/pdfs/Helix%20Manual%20Introduction%20web.pdf〉 (May 25, 2011).
Martin, C. M., and Randolph, M. F. (2001). “Applications of the lower and upper bound theorems of plasticity to collapse of circular foundations.” Proc., 10th Int. Conf. of IACMAG, Vol. 2, International Association for Computer Methods and Advances in Geomechanics (IACMAG), Tucson, 1417–1428.
Merifield, R. S. (2002). “Numerical modeling of soil anchors.” Ph.D. thesis, Univ. of Newcastle, Newcastle, Australia.
Merifield, R. S., and Smith, C. C. (2010). “The ultimate uplift capacity of multiplate strip anchors in undrained clay.” Comput. Geotech., 37, 4), 504–514.
Merifield, R. S., Lyamin, A. V., and Sloan, S. W. (2006). “Three-dimensional lower-bound solutions for the stability of plate anchors in sand.” Géotechnique, 56(2), 123–132.
Merifield, R. S., Lyamin, A. V., Sloan, S. W., and Yu, H. S. (2003). “Three-dimensional lower bound solutions for stability of plate anchors in clay.” J. Geotech. Geoenviron. Eng., 129(3), 243–253.
Merifield, R. S., Sloan, S. W., and Yu, H. S. (2001). “Stability of plate anchors in undrained clay.” Géotechnique, 51(2), 141–153.
Meyerhof, G. G. (1973). “Uplift resistance of inclined anchors and piles.” Proc., 8th Int. Conf. on Soil Mechanics and Foundation Engineering [Comptes Rendus du Congres International de Mecanique des Sols et des Travaux de Fondations], Vol. 2:1), A. A. Balkema Publishers, Rotterdam, Netherlands, 167–172.
Meyerhof, G. G., and Adams, J. I. (1968). “Ultimate uplift capacity of foundations.” Can. Geotech. J., 5(4), 225–244.
Mitsch, M. P., and Clemence, S. P. (1985). “Uplift capacity of helix anchors in sand.” Proc., ASCE Convention, Uplift Behavior of Anchor Foundations in Soil, ASCE, New York, 26–47.
Mooney, J. S., Adamczak, S. J., and Clemence, S. P. (1985). “Uplift capacity of helix anchors in clay and silt.” Proc.,ASCE Convention, Uplift Behavior of Anchor Foundations in Soil, ASCE, New York, 48–72.
Narasimha Rao, S., Prasad, Y. V. S. N., and Shetty, M. D. (1991). “The behavior of model screw piles in cohesive soils.” Soils Found., 31(2), 35–50.
Narasimha Rao, S., Prasad, Y. V. S. N., and Veeresh, C. (1993). “Behavior of embedded model screw anchors in soft clays.” Géotechnique, 43(4), 605–614.
Rowe, R. K. (1978). “Soil structure interaction analysis and its application to the prediction of anchor behavior.” Ph.D. thesis, Univ. of Sydney, Sydney, Australia.
Rowe, R. K., and Davis, E. H. (1982). “The behavior of anchor plates in clay.” Géotechnique, 32(1), 9–23.
Terzaghi, K. (1943). Theoretical soil mechanics, Wiley, New York.
Vesic, A. S. (1971). “Breakout resistance of objects embedded in ocean bottom.” J. Soil Mech. and Found. Div., 97(9), 1183–1205.
Wang, D., Hu Y., and Randolph, M. F. (2009). “Three-dimensional large deformation finite element analysis of plate anchors in uniform clay.” J. Geotech. Geoenviron. Eng., 136(2), 355–365.
Weikart, A. M., and Clemence, S. P. (1987). “Helix anchor foundations—Two case histories.”Foundations for transmission line towers (GSP 8), ASCE, New York, 72–80.
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 137 • Issue 7 • July 2011
Pages: 704 - 716
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 4, 2009
Accepted: Oct 27, 2010
Published online: Nov 4, 2010
Published in print: Jul 1, 2011
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.