TSUNAMI SCOUR AROUND A SQUARE STRUCTURE

摘要

Tsunami-induced local scour around a land-based square structure on a sand foundation was investigated with laboratory experiments and numerical simulations. The laboratory experiments revealed that a scour hole at the seaward corner of the structure could be reproduced and the maximum scour depth was affected by the relative tsunami wave height and embedded depth of the structure. It was also found with the numerical simulations that a scour hole around the seaward corner of the structure could be evaluated with not only flow velocities but also effective stresses because restricting force between sand particles decreased with the effective stresses.