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Foundation structure

A technology of foundation structure and buoyancy device, applied in the field of foundation structure, which can solve problems affecting the stability and/or performance of gravity foundation structure

Inactive Publication Date: 2012-12-12
ALSTOM RENEWABLE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these permanent structural features can affect the stability and / or performance of a gravity-based foundation structure when its final location is on the sea or river bed, particularly due to increased drag
For example, permanent structural features in the form of vertical extensions have been used to control the stability of gravity foundation structures during the submersion of the structure, but those permanent vertical extensions make gravity foundation structures unsuitable for use where strong tidal flows exist

Method used

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Embodiment Construction

[0043] Embodiments of the invention will now be described, by way of example only, and with reference to the accompanying drawings.

[0044] see first figure 1 , shows a foundation structure in the form of a gravity foundation structure 10 floating on the surface of a body of water 12 such as a sea or a river in a fully surfaced state. The gravity base structure 10 is typically constructed of steel and / or concrete and carries objects 14 that need to be located on the sea or river bed 16 . In the illustrated embodiment, the object 14 is a tidal turbine mounted on the gravity infrastructure 10 , but it is understood that any object that needs to be located on the sea or river bed 16 may be mounted on the gravity infrastructure 10 .

[0045] The gravity infrastructure 10 includes a plurality of integral buoyancy means in the form of integral ballast tanks 18 , 20 , 22 . The first and second integral ballast tanks 18 , 20 are stationary and the third integral ballast tank 22 is ...

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Abstract

A foundation structure (10) for locating an object (14) mounted on the foundation structure (10) on a sea bed or a river bed comprises an integral buoyancy device (22) having variable buoyancy and a rigid control surface (23). The integral buoyancy device (22) is movable relative to the foundation structure (10) to vary the position of the rigid control surface (23) and to control the position of the centre of buoyancy relative to the position of the centre of gravity. This stabilises the foundation structure 10 during submergence and surfacing. A method for controlling the deployment and retrieval of the foundation structure (10) is also described.

Description

technical field [0001] The present invention relates to infrastructure, and more particularly to infrastructure for placing objects, such as tidal turbines, on sea or river beds. Embodiments of the invention also relate to methods for controlling the deployment and retrieval of infrastructure such that objects mounted on the infrastructure, such as tidal turbines, can be placed on or retrieved from the sea or river bed. Background technique [0002] Foundation structures are commonly used to place objects on sea and river beds, and are particularly suitable for installation of tidal turbines. One common type of foundation structure is a gravity foundation structure. Gravity foundation structures are typically towed into positions where it is desired to mount objects on the sea or river bed and include ballast tanks which may or may not be properly ballasted material in order to control the buoyancy of the gravity based structure. For example, by filling the ballast tank w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D23/12E02D27/52E02D23/02E02D27/06E02D15/08E02B17/02
CPCE02D23/02Y02E10/28E02D23/12E02B9/08E02D27/52E02B2017/0039Y02E10/30B63B21/26B63B21/50E02D27/32Y02E10/20
Inventor 理查德·埃尔顿菲利浦·吉尔森
Owner ALSTOM RENEWABLE TECH
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