Abstract
The Akasi Kaikyo Bridge whose main span length is 1, 990m would be the largest suspension bridge once it is accomplished. Its foundations are now under construction in site, as scheduled. Prior to the actual construction, some hydraulic problems associated with the construction procedure had to be solved particularly from an engineering viewpoint. A considerable amount of experimental works have been carried out for many years in laboratory and/or site. The successive three papers will state what kind of hydraulic problems had to be considered to establish the safest construction procedure. At first, the present paper will describe how a serious foundation scour problem anticipated in site is coped with based on many hydraulic experiments. All basic design guidelines for preventing a foundation scour will be given.
