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Statements

Subject Item
dbr:Troll_A_platform
dbo:wikiPageWikiLink
dbr:Vacuum-anchor
Subject Item
dbr:Vacuum-anchor
rdfs:label
Vacuum-anchor
rdfs:comment
In large scale oceanic civil engineering, vacuum-anchors are used to anchor gravity-based structures (such as the Troll A Oil Platform) in the soft bottomed muck found on many oil bearing continental shelves and the world's shallower seas. This design is modeled on how the webbed feet of aquatic animals increase the surface area on the ground. When a lifting or sideways force is applied to the cup, the weight and inertia of the enclosed solution must also be displaced. Any material that spills out of the enclosure creates a vacuum that anchors the structure to the soft bottom.
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n16:Troll_A_Platform.jpg
dcterms:subject
dbc:Ship_anchors dbc:Oceanography dbc:Civil_engineering
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19679163
dbo:wikiPageRevisionID
1033682108
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n16:Troll_A_Platform.jpg?width=300
dbo:abstract
In large scale oceanic civil engineering, vacuum-anchors are used to anchor gravity-based structures (such as the Troll A Oil Platform) in the soft bottomed muck found on many oil bearing continental shelves and the world's shallower seas. This design is modeled on how the webbed feet of aquatic animals increase the surface area on the ground. The lowest part of the vacuum-anchors form downward-facing cylindrical cups connecting to the legs of the gravity-based structure. The top of the cups have a valve to exhaust gases and liquids trapped from the sea bottom looking to escape. This is conceptually similar to a tall drinking glass filled with water, then inverted. When a lifting or sideways force is applied to the cup, the weight and inertia of the enclosed solution must also be displaced. Any material that spills out of the enclosure creates a vacuum that anchors the structure to the soft bottom.
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dbr:Fasteners
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wikipedia-en:Vacuum-anchor?oldid=1033682108&ns=0
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1550
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wikipedia-en:Vacuum-anchor
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dbr:Outline_of_oceanography
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dbr:Vacuum-anchor
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wikipedia-en:Vacuum-anchor
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dbr:Vacuum-anchor