In large scale oceanic civil engineering, vacuum-anchors are ocean bottom fasteners used to anchor deep seas oil platforms (example: See Troll A Oil Platform) and other gravity-based structuresA National Geographic Channel production, documentary 2007(?), rebroadcast 2009-10-02, 12-13:00 hrs EDST (Comcast Cable Television system) in the soupy soft bottomed muck found on many oil bearing continental shelves and the world's shallower seas. Gravity based anchor legs flare out forming a wider footprint where they contact the bottom much as the webbed feet of many aquatic animals increase the surface area above the  vacuum-anchors which are open ended long cylindrical shaped deep cups with a sealed top end closed by a valve which connects and anchors mechanically to the legs of the gravity based structure. The valve is used to exhaust any gases and liquid which seeks to escape the trapped sea bottom materials entering the open end of the anchor. Physically, these are the upscaled analog of a tall drinking glass filled with water then turned upside down and secured in place bottom-side-up. When a lifting or sideways force is applied to such a container , the weight and inertia of the enclosed mass (The mushy gravel, mud, water, and rock solution of the sea bed) must also be displaced (lifted or moved sideways) which anchors them firmly in place within the surrounding materials of the soft bottom. When lifted, any enclosed material attempting to spill out of the enclosure creates a vacuum , just as does the container in the kitchen sink, giving the anchor their name .
In large scale oceanic civil engineering, vacuum-anchors are used to anchor gravity-based structuresA National Geographic Channel production, documentary 2007(?), rebroadcast 2009-10-02, 12-13:00 hrs EDST (Comcast Cable Television system) (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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ocean bottom fasteners
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deep seas oil platforms (example: See Troll A Oil Platform) and other
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in the soupy
(such as the Troll A Oil Platform) in the
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Gravity based anchor legs flare out forming a wider footprint where they contact the bottom much as the
This design is modeled on how the
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many
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above the
on the ground.
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The lowest part of the
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which are open ended long cylindrical shaped deep cups with a sealed top end closed by a valve which connects and anchors mechanically
form downward-facing cylindrical cups connecting
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gravity based
gravity-based
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valve is used to exhaust any gases and liquid which seeks to escape the trapped sea bottom materials entering the open end of the anchor.
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Physically, these are the upscaled analog of
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
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then turned upside down and secured in place bottom-side-up.
, then inverted.
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such a container
the cup
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mass (The mushy gravel, mud, water, and rock solution of the sea bed)
solution
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(lifted or moved sideways) which anchors them firmly in place within the surrounding materials of the soft bottom. When lifted, any enclosed material attempting to spill
. Any material that spills
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, just as does the container in the kitchen sink, giving the anchor their name
that anchors the structure to the soft bottom