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Project Number 238
Date of Summary June 01, 1999
Subject Recommended Procedure for Design of Drag-embedment (Fluke) Anchors
Performing Activity Det Norske Veritas
Principal Investigator Rune Dahlberg
Contracting Agency Minerals Management Service
Estimated Completion July 1999
Description This is a Joint Industry Project (JIP). The project will be performed in two parts, the results from Part 1 will be evaluated before moving on to Part 2. Part 1 will review experimental fluke anchor test data, select good quality data for back fitting analysis, and to use numerical model to improve understanding of the mechanisms that govern the performance and holding capacity of fluke anchors. The result will be an executable computer program, DIGIN, used for the back-fitting analysis to be delivered to each participant in Part 1.
Progress The DIGIN Manual and program was completed and distributed to the participants. If the forthcoming back-fitting analysis of drag-in plate anchors reveal that some minor adjustments to the program are required it will be carried out as part of the final effort. The project is approximately 90% complete. DNV will evaluate the possibility of arranging a workshop with anchor installation contractors on the issue of anchor installation. The objective is to get the views from the installation contractors on options available to install fluke (and drag-in plate) anchors to a specified installation load. The installation contractors will be encouraged to summarize their views in a document, which will be considered for inclusion as an addendum to the next revision of the RP's. Some changes to the nomenclature to the guideline were proposed, and also to re-structure part of the document with new headings.

Reports
AA (156 pages, 9,781 KB) File in Adobe's Portable Document Format (PDF) . Deep Water Anchors--Back-Fitting Analysis of Drag-In Plate Anchors in Clays (Technical Report No. TR 2-2), Report No. 98-3585, Revision No. 01, Det Norske Veritas, January 13, 1999. (Proprietary Report)
AB (50 pages, 2,735 KB) File in Adobe's Portable Document Format (PDF) . Deep Water Anchors--Design Procedures for Drag-In Plate Anchors (Technical Report No. TR 2-3), Report No. 98-3536, Revision No. 01, Det Norske Veritas, November 16, 1998. (Proprietary Report)
AC (99 pages, 7,329 KB) File in Adobe's Portable Document Format (PDF) . Deep Water Anchors--Pilot Reliability Analysis of Fluke Anchors (Technical Report TR 2-5), Report No. 98-3034, Revision No. 01, Det Norske Veritas, March 20, 1998. (Proprietary Report)
AD (31 pages, 1,821 KB) File in Adobe's Portable Document Format (PDF) . Design and Installation of Drag-In Plate Anchors in Clay, Recommended Practice, RP-E302, Det Norske Veritas, 1999. (Proprietary Report)

 

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