Bearing Capacity of Expanded‐Base Piles with Compacted Concrete Shafts
Publication: Journal of Geotechnical Engineering
Volume 116, Issue 9
Abstract
A data base of 70 loading tests on expanded‐base piles with compacted concrete shafts has been collected to develop empirical design correlations based on standard penetration N‐values. Both shaft and point resistances, and were found to increase with depth and with increasing N‐value. It appears that limiting values of and might be approached for initially loose sands at D/B () ratios greater than 12; however, at greater relative densities, both and continue to increase with depth, but at a decreasing rate, indicating an important scale effect. A modification to traditional bearing capacity theory is used to show that the so‐called scale effect arises because the bearing capacity factor which is a function of the friction angle of the soil, decreases with depth or increasing effective overburden pressure; consequently, point resistance increases with depth at a decreasing rate. About 40% of the data base was used as an independent means of evaluating the accuracy of the empirical correlations developed.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Berezantsev, V. C., Khrisoforov, V. S., and Golubkov, V. N. (1961). “Load bearing capacity and deformation of piled foundations.” Proc., 5th Int. Conf. on Soil Mech. and Foundation Engrg., 2, 11–15.
2.
Briaud, J.‐L. (1988). “Evaluation of cone penetration test methods using 98 pile load tests.” Proc., First Int. Symp. on Penetration Testing, 2, 687–697.
3.
Briaud, J.‐L., and Tucker, L. M. (1988). “Measured and predicted axial response of 98 piles.” J. Geotech. Engrg., ASCE, 114(9), 984–1001.
4.
Chin, F. K., and Vail, A. J. (1973). “Behavior of piles in alluvium.” Proc., 8th Int. Conf. on Soil Mech. and Foundation Engrg., 2.1, 47–52.
5.
Coyle, H. M., and Castello, R. (1981). “New design correlations for piles in sand.” J. Geotech. Engrg., ASCE, 107(7), 965–986.
6.
Fellenius, B. H. (1975). “Test loading of piles—Methods, interpretation, and proof testing.” J. Geotech. Engrg., ASCE, 101(9), 855–869.
7.
Fleming, W. G. K., et al. (1985). Piling engineering. John Wiley and Sons, Inc., New York, N.Y.
8.
Hirany, A., and Kulhawy, F. H. (1989). “Interpretation of load tests on drilled shafts. Part 1: Axial compression.” Proc., Foundation Engrg. Congress, ASCE, 2, 1132–1149.
9.
Kulhawy, F. H., and Jackson, C. S. (1989). “Some observations on undrained side resistance of drilled shafts.” Proc., Foundation Engrg. Congress, ASCE, 2, 1011–1025.
10.
Leonards, G. A., and Lovell, D. (1979). “Interpretation of load tests on high‐capacity driven piles.” Behavior of deep foundations, STP 670, ASTM, Philadelphia, Pa., 388–415.
11.
Meyerhof, G. G. (1983). “Scale effects of ultimate pile capacity.” J. Geotech. Engrg., ASCE, 109(6), 797–806.
12.
Neely, W. J. (1990). “Bearing capacity of expanded‐base piles in sand.” J. Geotech. Engrg., ASCE, 116(1), 73–87.
13.
Nordlund, R. L. (1982). “Dynamic formula for pressure injected footings.” J. Geotech. Engrg., ASCE, 108(3), 419–437.
14.
Peck, R. B., Hanson, W. E., and Thornburn, T. H. (1974). Foundation engineering. 2d Ed., John Wiley and Sons, Inc., New York, N.Y.
Information & Authors
Information
Published In
Copyright
Copyright © 1990 ASCE.
History
Published online: Sep 1, 1990
Published in print: Sep 1990
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.