INCIPIENT FLUIDIZATION OF FINE SANDS IN DEEP SEABED

The use of fluidization systems in maintaining navigational channels, via a buried source pipe, has the potential to replace expensive dredging for unstable coastal inlets. The author studied the pore pressure increase in a deep sandy seabed due to the discharges from a buried source pipe. Darcy's law was assumed. The injection flow from the discharge ports of the source pipe was simulated as line discharges. Using the technique of conformal mappings and the method of images, an analytical solution of the pore-pressure increase was obtained. The pore-pressure distribution was analyzed for a burial depth five to twenty times the pipe diameter. Results revealed that the effect of pipe size was limited to a distance from the center of the pipe of approximately half of the burial depth. The analytical solution provides the basis for the determination of the flow rate for the incipient fluidization of the cover sands.

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  • English

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  • Accession Number: 00711546
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 18 1995 12:00AM