2019 Volume 75 Issue 2 Pages I_432-I_437
The coastal areas of the Pacific Ocean suffered extensive damage by the tsunami of the 2011 off the Pacific Coast of Tohoku Earthquake. Installing steel pipe piles behind the caisson with filling the space between the caisson and piles is proposed as one of the reinforcing methods against tsunami, called “Steel Pipe Method”. In order to establish the design method of this structure, the design of the steel pile is the most important. In this study, the effect of the shape of filling soil and rigidity of foundation ground on pile was examined by model loading experiments. The model ground was prepared by dry silica sand #5 with relative density of 80% or 10%. As a result, it was found that the smaller the width of the inner filling soil, the larger the maximum bending moment generated in the pile. In addition, when the rigidity of the foundation ground is low, the external force at pile was acting to a deep depth.
