四角柱体の波による局所洗掘特性

抄録

This paper presents the results of an experimental investigation on scour around rectangular columns exposed to waves. The equilibrium scour depth normalized by the rectangular column width (dsE/B) may be depend on the following nondimensional parameters : dsE/B=f (E/B, D/B, KC, U/uc) in which E and D is thickness and height of rectangular column respectively, KC is Keulegan Carpenter number based on E, U is half amplitude velocity at bottom, uc is critical fluid velocity of sand bed. Based on the experimental results, the qualitative estimation of dsE/B was established in two different categories : the clear-water scour and the live-bed scour. The equilibrium scour depth dsE was found to increase with decreasing the thickness of rectangular.