Wave And Current Together Local Scour Sea Bed Upright Large-diameter Cylindrical Buildings Around

With the development of coastal and offshore engineering, the local scour problems are paid more and more attention. However scour in the vicinity of large scale structures founded on seabed have caused destruction to the foundations since the problems haven't been studied extensively. Based on the principles of local scour around seabed founded large diameter cylinders caused by both waves and currents, the flow and scour processes are investigated in this paper after summarizing and consulting lots of papers and researches existing currently. Based on the data on scour around large diameter cylinders exposed to waves and currents, effects of every kind of sea enviromental parameters on maximum scour depth are analyzed and guided by dimensional analysis and multidimensional linear regression, an equation is given to compute maximum scour depth around large diameter cylinders in combined waves and currents. Compared with some other equations, this equation is more accrete, simpler and clearer and the computed results are in good agreement with experimental ones. Therefore the method and the equation developed in this paper to compute maximum scour depth is applicable and provides a reliable and convenient way to access maximum scour depth in engineering.