Apparatus and method for reduction of sonic vibrations in a liquid

a technology of sonic vibration and apparatus, which is applied in the direction of foundation engineering, bulkheads/piles, construction, etc., can solve the problems of sound emission from driving down foundation members into the sea bed, serious health risks, fish and sea mammals within a certain distance from foundation members, etc., to minimise environmental impact, fast and cheap

Inactive Publication Date: 2014-08-28
LO NOISE APS
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]Considering the prior art described above, it is an object of the present invention to provide an apparatus and a method for a fast and a cheap way of driving down foundation members in the bottom of a liquid, such as an ocean, while ensuring minimal sonic vibration in order to minimise the environmental impact.

Problems solved by technology

A well-known problem for driving down foundation members in an offshore environment, is the sound emission from driving down foundation members into the sea bed.
Research has shown that fish and sea mammals, within a certain distance from the foundation member being driven in, are at serious health risk due to the sonic vibrations (sound emissions) in the water and from the sea bed.

Method used

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  • Apparatus and method for reduction of sonic vibrations in a liquid
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  • Apparatus and method for reduction of sonic vibrations in a liquid

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Embodiment Construction

[0040]The present invention addresses the problem of, speedily, driving down one or more foundation members, preferable monopiles, into the bottom of a liquid, to create a foundation for structures in an offshore environment, such as Wind turbines. It provides an apparatus and method of foundation in an environmentally friendly way, for example, to the installment of multiple wind generators in offshore wind farms. In an example, it can be done by a positionable, self-supporting, temporary cofferdam, by transferring, positioning, adjusting, the temporary cofferdam from a vessel to the desired position on the bottom of the ocean, enabling early placing and adjustment of cofferdam and later driving in the foundation member.

[0041]An aspect of the present invention is a method for environmentally safety as well as speedy foundation member installation for use in oceans and lakes. Preferably, including a method for transporting a temporary cofferdam structure to a construction site, tran...

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PUM

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Abstract

An apparatus for reduction of sonic vibrations caused when driving a foundation member below the surface of a liquid has a tube structure which is lowered below the surface of the liquid, and which receives the foundation member. A seal is in contact with the tube structure and creates a contained volume around the foundation member, which may be pumped dry so as to minimize the communication of sonic vibrations into the liquid.

Description

FIELD OF INVENTION[0001]The invention relates to an apparatus for reduction of sonic vibrations in a liquid, when driving down a foundation member below the surface of the liquid so that one end is rooted in the bottom of the liquid.BACKGROUND OF THE INVENTION[0002]A well-known problem for driving down foundation members in an offshore environment, is the sound emission from driving down foundation members into the sea bed. Research has shown that fish and sea mammals, within a certain distance from the foundation member being driven in, are at serious health risk due to the sonic vibrations (sound emissions) in the water and from the sea bed. A number of research papers have stated said harming effect on fish and sea mammals, from noise and sonic vibrations due to foundation members, such as monopiles being driven into the sea bed, e.g.: “Technical Guidance for Assessment and Mitigation of the Hydroacoustic Effects of Pile Driving on Fish”, February 2009, Prepared for: California D...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E02D13/00
CPCE02D13/005E02D13/00
Inventor HANSEN, ANDERS ORGARDTHOMSEN, KURT ELITHBENDT, MADS
Owner LO NOISE APS
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