抄録
Recently, completely submerged structure resting on piles is expected as a new alternative structure to bridge and/or immersed tunnel for relatively shallow-water crossing. In case of those structures, no change in buoyancy can be expected and only pile must resist against external wave force. As a result, the piles should have enough length to exert their friction strength against pulling out force due to wave. Since high safety factor for pulling out is required, reducing vertical force acting on piles becomes important for economical design. This study aims to evaluate the effect of sectional shape on the wave force and to introduce the relationship between sectional shape and vertical wave force acting on supporting structure.