Effects of Sand Clay Mixtures on Scour Around Vertical Piles Due to Long Crested and Short Crested Nonlinear Random Waves

Abstract

This note provides a practical stochastic method by which the effects of sandclay mixtures on the maximum equilibrium scour depth around vertical piles exposed to longcrested (2D) and shortcrested (3D) nonlinear random waves can be derived. This is made by using the regular wave formulas for scour depth for sandclay mixtures by Dey et al. (2011, Scour at Vertical Piles in SandClay Mixtures Under Waves,â€‌ J. Waterway, Port, Coastal, Ocean Eng., 137(6), pp. 324–331) and the stochastic method presented by Myrhaug and Ong (2013, “Scour Around Vertical Pile Foundations for Offshore Wind Turbines Due to LongCrested and ShortCrested Nonlinear Random Waves,â€‌ ASME J. Offshore Mech. Arctic Eng., 135(1), p. 011103). Thus the present results are supplementary to those presented in the latter reference. An example calculation is provided.