Seabed Anchorages for Floating Offshore Structures PDF Download

Author: FIP Commission on Sea Structures. Working Group on Foundations
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Association de recherche en géotechnique marine (France)
Publisher: Editions TECHNIP
ISBN: 9782710805724
Category : Technology & Engineering
Languages : en
Pages : 256

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Author: Ivar Foss
Publisher:
ISBN:
Category :
Languages : en
Pages : 104

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Author: FIB – International Federation for Structural Concrete
Publisher: FIB - International Federation for Structural Concrete
ISBN: 0907862101
Category : Technology & Engineering
Languages : en
Pages : 58

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Author: Mark Damian Richardson
Publisher:
ISBN:
Category : Anchorage (Structural engineering)
Languages : en
Pages :

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The gradual depletion of shallow water hydrocarbon deposits has forced the offshore oil and gas industry to develop reserves in deeper waters. Dynamically installed anchors have been proposed as a cost-effective anchoring solution for floating offshore structures in deep water environments. The rocket or torpedo shaped anchor is released from a designated drop height above the seafloor and allowed to penetrate the seabed via the kinetic energy gained during free-fall and the anchor s self weight. Dynamic anchors can be deployed in any water depth and the relatively simple fabrication and installation procedures provide a significant cost saving over conventional deepwater anchoring systems. Despite use in a number of offshore applications, information regarding the geotechnical performance of dynamically installed anchors is scarce. Consequently, this research has focused on establishing an extensive test database through the modelling of the dynamic anchor installation process in the geotechnical centrifuge. The tests were aimed at assessing the embedment depth and subsequent dynamic anchor holding capacity under various loading conditions. Analytical design tools, verified against the experimental database, were developed for the prediction of the embedment depth and holding capacity.

Author: P. Le Tirant
Publisher: Editions TECHNIP
ISBN: 9782710803331
Category : Technology & Engineering
Languages : en
Pages : 528

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Author: Alain Puech
Publisher: Editions TECHNIP
ISBN: 9782710804536
Category : Technology & Engineering
Languages : en
Pages : 170

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Author: Institution of Mechanical Engineers (Great Britain)
Publisher:
ISBN:
Category : Business parks
Languages : en
Pages : 204

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Author: Antonioluca Manno
Publisher:
ISBN:
Category :
Languages : en
Pages : 139

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The importance of properly designing and selecting an anchor is key to reliable techniques for floating offshore platforms including power generation from marine currents. Numerous studies have demonstrated how the uplift capacity of embedment anchors is highly dependent on the soil properties and the anchor geometry. This work focuses in detail on the behavior of vertically loaded circular anchors to keep a floating structure stationary in the offshore environment. The main goal of this research was to find and evaluate an alternative to the foundations employed in the M. Eng. 2009/10 offshore project. The initial option consisted of drag embedment anchors and suction anchors as the foundations for the floating structure located in the Messina Strait that carries a horizontal-axis marine current turbine. Examining past theories and tests, and using dimensional analysis, we determined that circular plate anchors of 4.22 m and 2.72 m in diameter represent a good alternative design for the foundations of the front and back floating platforms. These anchors have an embedment depth-to-diameter ratio of 3 and a plate thickness-to-diameter ratio of 3%. Therefore, in comparison to the initial foundation options developed in the M. Eng. project, the solution with circular anchors has the advantage to reduce the overall dimensions of the anchors, reduce the material necessary for their manufacture, minimize the duration and cost of installation, and provide an efficient anchoring system independent of the local current direction.

Author: United States-Japan Cooperative Program in Natural Resources. Panel on Marine Facilities
Publisher:
ISBN:
Category : Ocean engineering
Languages : en
Pages : 472

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