Incipient Fluidization of Fine Sands in Deep Seabed
Publication: Journal of Hydraulic Engineering
Volume 121, Issue 9
Abstract
The pore pressure increase in a deep sandy seabed due to the discharges from a buried source pipe was studied analytically. Darcy's law was assumed. The injection flow from the discharge ports of the source pipe was simulated as line discharges. An analytical solution of the pore-pressure increase was obtained using the technique of conformal mappings and the method of images. The pore-pressure distribution was analyzed for a burial depth 5–20 times the pipe diameter. The results indicated that the effect of the pipe size was confined to a distance from the center of the pipe of approximately half of the burial depth. Based on the analytical solution, the flow rate for the incipient fluidization of the cover sands was determined using the fluidization criterion adopted in 1990 by Lennon, Chang, and Weisman.
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References
1.
Lennon, G. P., Chang, T., and Weisman, R. N.(1990). “Predicting incipient fluidization of find sands in unbounded domains.”J. Hydr. Engrg., ASCE, 116(12), 1454–1467.
2.
Lennon, G. P., MacNair, W., Weisman, R. N., and Lindley, J. (1992). “3-D effects of incipient fluidization of fine sands in unbounded domains.”Proc., ASCE Nat. Conf. on Hydr. Engrg., ASCE, New York, N.Y., 654–659.
3.
U.S. Army Engr. Wtrwy. Experiment Station. (1992). “Fluidizer system design for channel maintenance and sand bypassing.”Dredging Res. Tech. Notes DRP-3-09, Vicksburg, Miss.
4.
Weisman, R. N., Lennon, G. P., and Roberts, E. W.(1988). “Experiment on fluidization in unbounded domains.”J. Hydr. Engrg., ASCE, 114(5), 502–515.
5.
Weisman, R. N., Lennon, G. P., and Clausner, J. E. (1992). “A design manual for coastal fluidization systems.”Proc., Coast. Engrg. Practice `92, ASCE, New York, N.Y., 862–878.
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Published In
Journal of Hydraulic Engineering
Volume 121 • Issue 9 • September 1995
Pages: 653 - 656
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Sep 1, 1995
Published in print: Sep 1995
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