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Diagram A.2 – Physical modelling results and approximate flow visualisations presented by Yeow and Cheng (2003) for scour around a model pile framing in to a caisson which has a diameter four times greater than that of the pile. (The curve labelled ‘Snamprogetti’ refers to the output from a study reported by DHI and Snamprogetti in 1992).
Key to plot: hc – height of the top of the caisson above the seabed level; Dc – diameter of the caisson; S – equilibrium scour depth at the ratio of hc/Dc under consideration; S0 – limiting equilibrium scour depth