Load Transfer for Pipe Piles in Highly Pressured Dense Sand
Publication: Journal of Geotechnical Engineering
Volume 117, Issue 8
Abstract
Large‐scale loading tests were conducted on closed‐toe and open‐toe piles driven into dense submerged sand confined in a pressure chamber. Unit load‐transfer relations were developed and related to stress conditions in the chamber. Ultimate shaft resistance in compressional loading was found to be approximately equal to the ambient lateral effective stress in the chamber before driving, and was generally not dependent on the geometry of the toe. From this observation it can be inferred that because of installation and loading effects the operative earth‐pressure coefficient on the pile shaft approximately doubled from the ambient value that existed before driving. In uplift, ultimate shaft resistance was about 20% lower than in compression, regardless of depth. The open‐toe piles consistently remained plugged during static testing but nonetheless exhibited lower bearing capacity than the closed‐toe piles. This can be explained by deformation and compression of the soil within the plug as a means of effectively reducing the rigidity index of the soil against which the toe bears.
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References
1.
Briaud, J.‐L., and Tucker, L. (1984). “Piles in sand: A method including residual stresses.” J. Geotech. Engrg., ASCE, 110(11), 1666–1680.
2.
Ko, H.‐Y., Atkinson, R. H., and Goble, G. G. (1984). “Centrifugal testing of model piles and piles groups; Vol. III, Centrifugal tests in clay.” Report No. FHWA/ RD‐84/004, Federal Highway Administration, Washington, D.C.
3.
Murff, J. D., Raines, R. D., and Randolph, M. F. (1990). “Soil plug behavior of piles in sand.” Proc., 22nd Offshore Tech. Conf., 4, 25–32.
4.
Paikowsky, S. G., and Whitman, R. V. (1990). “The effects of plugging on pile performance and design.” Can. Geotech. J., 27(3), 429–440.
5.
"Recommended practice for planning, designing and constructing fixed offshore platforms.” (1989). American Petroleum Institute Recommended Practice 2A (RP2A), API, Washington, D.C.
6.
Tucker, L. (1987). “Program APILE.” Computer programs for geotechnical engineers, Civil Engineering Department, Texas A&M Univ., College Station, Tex.
7.
Vesic, A. S. (1972). “Expansion of cavities in infinite soil mass.” J. Soil Mech. Found. Div., ASCE, 98(3), 265–290.
8.
Vipulanandan, C., Wong, D., Ochoa, M., and O'Neill, M. W. (1989). “Modeling of displacement piles in sand using a pressure chamber.” Foundation engineering: Current principles and practice, 1, F. H. Kulhawy, ed., ASCE, New York, N.Y.,526–541.
9.
Wong, D. (1985). “Design and analysis of an apparatus to simulate density and stresses in deep deposits of granular soils,” thesis presented to the University of Houston, at Houston, Tex., in partial fulfillment of the requirements for the degree of Master of Science.
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Copyright © 1991 ASCE.
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Published online: Aug 1, 1991
Published in print: Aug 1991
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