Craneless upending of large offshore monopiles using a specialised floater

The paper presents the concept of a Floater for Upending Piles (FlUP), which can be considered as an efficient approach for the installation of very large offshore monopiles in the offshore-wind industry. This principle is embedded in a concept that aims to decouple the monopile installation steps of upending and pile driving. The idea of the FlUP is to shift the pile from horizontal to vertical position with a self-ballasting floater and utilise a small crane-vessel docking on the floater for pile-driving operations afterwards. The key component of this concept is the FlUP, which is able to upend itself carrying the monopile by shifting ballast water using pumps. A feasibility study of this approach, including a preliminary design of a floater and corresponding design-relevant calculations is presented. The study includes examinations of hydrostatic stability as well as seakeeping behaviour computations to evaluate the limiting sea states for installation in an offshore environment. This is followed by a demonstration of the general feasibility of this concept regarding hydrostatic and seakeeping aspects.

Schlagworte

Craneless Upending

Foundation Installation

Installation Method

Large Monopile

Offshore Wind

Upending Floater

DDC Class

600: Technik

620: Ingenieurwissenschaften

Lizenz

http://rightsstatements.org/vocab/InC/1.0/

Name

paper_0018_file_0491_Craneless_Upending_of_Large_Offshore_Monopiles_Using_a_Specialis.pdf

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649.06 KB

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Adobe PDF

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Craneless upending of large offshore monopiles using a specialised floater