Scour development around large-diameter monopiles in cohesive soils: evidence from the field

Harris, J. and Whitehouse, R.J.S. (2017) Scour development around large-diameter monopiles in cohesive soils: evidence from the field. Journal of Waterway, Port, Coastal, and Ocean Engineering, 143 (5).

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Despite the progress in scour research over the last three decades, seabed scour development in cohesive and nonuniform soils is still an area of great uncertainty and remains a challenge for designing structurally efficient and effective foundations in the offshore marine environment. The uncertainty is made greater by the timescale required for scouring and effects, such as sediment abrasion, pile installation impacts, and operationally and environmentally induced dynamic motions. The rapid growth in offshore wind, particularly in European waters, has led to a requirement for estimates for scour development in such soils. This becomes very pertinent for large-volume serial installation of foundations, such as those required for offshore wind farm developments, given that there is a limit to the amount of detailed geotechnical information that can be collected as part of a project, and soil erosion testing is not standard. There is a reliance in geotechnical data, such as undrained shear strength, derived from cone penetration tests, supplemented with borehole data collected at a limited number of locations across the wind farm site combined with laboratory analysis of soil samples. This paper reviews the present evidence from both field and laboratory measurements of scour potential and looks at possible approaches for determining scour magnitude in cohesive soils including hydraulic and mechanical effects.

Item Type: Article
Subjects: Coasts > Sediment transport and scour
Coasts > General
Divisions: Floods
Depositing User: Unnamed user with email
Date Deposited: 02 Apr 2020 09:53
Last Modified: 02 Apr 2020 09:53

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