Extraction Forces for Offshore Foundations under Undrained Loading
Publication: Journal of Geotechnical Engineering
Volume 116, Issue 5
Abstract
Centrifuge model tests have been carried out under controlled laboratory conditions to simulate the installation of jack‐up spud can‐type foundations into beds of uniform clay having undrained shear strengths in the range of 12–40 kPa. Much of the previously published field data relating to removal of objects from the seabed covers sites with ill‐determined strength profiles but generally rather lower strengths. Results are presented that indicate that the underbase adhesion necessary to sustain substantial breakout resistance is not obtained until a compressive bearing pressure approaching that required for a substantial penetration, i.e., surface failure, has been previously applied. Once compressive failure is approached then breakout forces increase towards the compression capacity but rarely achieve the theoretical upper limit of equality between tension and compression under undrained conditions.
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References
1.
Byrne, P. M., and Finn, W. D. L. (1978). “Breakout of submerged structures buried to a shallow depth.” Can. Geotech. J., 15(2), 146–154.
2.
Craig, W. H. (1988). “Centrifuge models in marine and coastal engineering.” Centrifuges in soil mechanics, W. H. Craig, R. G. James, and A. N. Schofield, eds., A. A. Balhema, Rotterdam, the Netherlands.
3.
Craig, W. H., and Higham, M. D. (1985). “The application of centrifugal modelling to the design of jack‐up rig foundations.” Proc. Conf. Offshore Site Investigation, Society for Underwater Technology, 293–305.
4.
Craig, W. H., and Rowe, P. W. (1981). “Operation of a geotechnical centrifuge from 1970‐1979.” Geotech. Test. J., 4(1), 19–25.
5.
Craig, W. H., James, R. G., and Schofield, A. N. (1988). Centrifuges in soil mechanics, A. A. Balkema, Rotterdam, the Netherlands.
6.
Davis, E. H., and Booker, J. R. (1973). “The effect of increasing strength with depth on the bearing capacity.” Geotechnique, London, England, 23(4), 551–563.
7.
Davis, G. H., and Poulos, H. G. (1972). “Rate of settlement under two and three‐dimensional conditions.” Geotechnique, London, England, 22, 95–114.
8.
Finn, W. D. L., and Byrne, P. M. (1972). “The evaluation of the breakout force for a submerged ocean platform.” Proc. 4th Offshore Tech. Conf.
9.
Foda, M. (1982). “On the extrication of large objects from the ocean bottom (the breakout phenomenon).” J. Fluid Mech., 117, 211–231.
10.
Foda, M. A. (1983). “Breakout theory for offshore structures seated on sea bed.” Geotechnical practice in offshore engineering. ASCE, New York, N.Y., 228–299.
11.
Lee, H. J. (1973). “Breakout of partially embedded objects from cohesive seafloor soils.” Proc. 5th Offshore Tech. Conf.
12.
Liu, C. L. (1969). “Ocean sediment holding strength against breakout of partially embedded objects.” Proc. Civ. Engrg. in the Oceans II, ASCE, 105–116.
13.
Muga, B. J. (1967). “Bottom breakout forces.” Proc. Civ. Engrg. in the Oceans, ASCE, 569–600.
14.
Ninomiya, K., Tagaya, K., and Murase, Y. (1972). “A study on suction and scouring of sit‐on‐bottom type offshore structure.” Proc. 4th Offshore Tech. Conf.
15.
Pliskin, L. (1979). “Removal of concrete gravity platforms.” Proc. 11th Offshore Tech. Conf.
16.
Rapoport, V., and Young, A. G. (1985). “Uplift capacity of shallow offshore foundations.” Uplift behaviour of anchor foundations in soil, ASCE, New York, N.Y., 73–85.
17.
Roderick, G. L., and Lubbad, A. (1975). “Effect of object in‐situ time on bottom breakout.” Proc. 7th Offshore Tech. Conf.
18.
“Statement of research needs on offshore foundation design.” (1987). Under‐Water Technology, London, United Kingdom, 13(2), 6–13.
19.
Vesic, A. S. (1971). “Breakout resistance of objects embedded in ocean bottom.” Proc., ASCE, 97(9), 1183–1205.
Information & Authors
Information
Published In
Journal of Geotechnical Engineering
Volume 116 • Issue 5 • May 1990
Pages: 868 - 884
Copyright
Copyright © 1990 ASCE.
History
Published online: May 1, 1990
Published in print: May 1990
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