Local scour and scouring protection of drilling platforms in the arctic sea environment

Jorma Rytkönen

Research output: Book/ReportReportProfessional

Abstract

Placing an obstruction, such as for instance an artificial island platform, on the sea bottom will cause a disturbation in the bottom equilibrium. As a result a local scour-deposit phenomenon may occur, which especially in sandbottoms can significantly reduce the stability of platform and cause nonuniform stress distributions under the platform base. An increase of stresses over the design value may, in extreme cases, cause the failure of a whole structure. Being aware of the scouring phenomenon and undertaking the scouring protection measures already before the platform installation is in general more feasible than to try to repair damages afterwards. In the paper the local scouring due to waves and currents near the toe of gravity platforms is described. The description concentrates mainly on the artificial gravity platforms in the shallow waters (water depth ~ 10 -30 m). Scouring phenomenon and scouring protection measures are described on the basis of the available literature on the subject. Moreover some speculations concerning the model testing procedures are presented, too.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages92
ISBN (Print)951-38-1894-2
Publication statusPublished - 1983
MoE publication typeD4 Published development or research report or study

Publication series

NameTiedotteita / Valtion teknillinen tutkimuskeskus
PublisherVTT
Volume267

Fingerprint

gravity platform
scour
drilling
artificial island
repair
water depth
shallow water
damage
sea

Cite this

Rytkönen, J. (1983). Local scour and scouring protection of drilling platforms in the arctic sea environment. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tiedotteita, No. 267
Rytkönen, Jorma. / Local scour and scouring protection of drilling platforms in the arctic sea environment. Espoo : VTT Technical Research Centre of Finland, 1983. 92 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 267).
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Rytkönen, J 1983, Local scour and scouring protection of drilling platforms in the arctic sea environment. Valtion teknillinen tutkimuskeskus. Tiedotteita, no. 267, VTT Technical Research Centre of Finland, Espoo.

Local scour and scouring protection of drilling platforms in the arctic sea environment. / Rytkönen, Jorma.

Espoo : VTT Technical Research Centre of Finland, 1983. 92 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 267).

Research output: Book/ReportReportProfessional

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AB - Placing an obstruction, such as for instance an artificial island platform, on the sea bottom will cause a disturbation in the bottom equilibrium. As a result a local scour-deposit phenomenon may occur, which especially in sandbottoms can significantly reduce the stability of platform and cause nonuniform stress distributions under the platform base. An increase of stresses over the design value may, in extreme cases, cause the failure of a whole structure. Being aware of the scouring phenomenon and undertaking the scouring protection measures already before the platform installation is in general more feasible than to try to repair damages afterwards. In the paper the local scouring due to waves and currents near the toe of gravity platforms is described. The description concentrates mainly on the artificial gravity platforms in the shallow waters (water depth ~ 10 -30 m). Scouring phenomenon and scouring protection measures are described on the basis of the available literature on the subject. Moreover some speculations concerning the model testing procedures are presented, too.

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Rytkönen J. Local scour and scouring protection of drilling platforms in the arctic sea environment. Espoo: VTT Technical Research Centre of Finland, 1983. 92 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 267).