Adaptivity of plate anchors to restrain the impact of seabed trenching. Issue 1 (8th February 2023)

• Record Type: Journal Article
• Authors: Han, C.; Liu, J.; Yi, P.
• Is Part Of: Géotechnique letters. Volume 13:Issue 1(2023)
• Page Start: 1
• Page End: 26
• Publication Date: 2023-02-08
• Subjects: soil/structure interaction -- anchor & anchorages -- offshore engineering -- bearing capacity; Geotechnical engineering -- Periodicals; Engineering geology -- Periodicals; 624.151
• DOI: 10.1680/jgele.21.00160
• Languages: English
• ISSNs: 2045-2543

Abstract

Abstract : The seabed trenching due to chain-soil-water interaction in deepwater moorings is disadvantageous to the holding capacity of the anchor, which threatens the safety of the whole floating system. A measure is proposed in this study to restrain the adverse impact of seabed trenching by utilizing the diving potential of plate anchors. Model tests were conducted to verify the stability and further keying behaviour of the plate anchor in trenched seabed. Test results show that the plate anchor automatically dives deeper and hence develops higher resistance to balance the uplift load with the progressive development of the seabed trenching. This indicates that the plate anchor adapts to the seabed trenching automatically and the holding capacity of the plate anchor is largely unaffected in trenched seabed.