Abstract
In this paper, a design decision to reach to a final scour protection method for the pier foundation of the Akashi Kaikyo Bridge will be briefly described based on the results of hydraulic experiments. Five different kinds of protection methods are considered. The necessary dimensions for the finally employed rubble stone protection method will be shown in the present investigation. In addition, in order to prevent small floor sands from migrating through each rubble stone, a new and practical anti-scour scheme, i. e., a filter unit concept will be introduced. Using the filter concept in construction will be proven through a site experiment. Finally, the behavior of rubble stones when thrown in tidal current will also be described, considering such factors as current speed, sea slope, and sea material as well as the existence of large structure.
