LOCAL SCOUR DEPTH OF SAND BOTTOM AROUND GRAVITATIONAL ICE-RESISTANCE STRUCTURES CAUSED BY WAVES

Research was carried out in a wave basin on models of large diameter cylindrical supports deepened to the sea bed which was formed of sand of various granularity. Also experiments were conducted where polymer granular materials of particles density of less than sand grains were used for models. The analysis of the experimental results was carried out using similitude and dimensionless theory. The mathematical analysis of the experimental results made it possible to obtain the generalised dependence of the bottom local scour depth around supports on three non-dimensional parameters. This dependence is correct for a wide range of changes in grain sizes of bottom materials - from sand up to rock riprap.