2025Years5Month28At the Japan Port Association Awards Ceremony held at the Naha Cultural Arts Theater on the 1st,TakaProfessor Hidenori Hashi and his research group have established the7The paper won the Japan Port and Harbour Association Award for the year.

【Winner】
Dai Kurihara (Maritime, Port and Aviation Technology Research Institute, Port and Airport Technology Research Institute)
Hideki Takahashi (Tokyo University of Marine Science and Technology) Academic Research Department of Marine Resources and Energy

[Title of award-winning research]
Evaluation of resistance of composite breakwater under full-scale stress

[Summary of the Award-winning Research]
In response to frequent high waves and tsunamis, reinforcement methods using crushed stone piled up behind concrete caissons of breakwaters are beginning to be widely used at construction sites. However, when considering the collapse of caissons, the characteristics of the resistance of crushed stone piled up behind the concrete caissons depend on the behavior of the ground's small deformation and repeated deformation, which makes it complicated, and in order to quantitatively grasp the resistance, it is necessary to reproduce full-scale stress in the ground through experiments, and this has not been studied. In this study, we used a centrifugal model experiment that can reproduce full-scale stress to parametrically change the experimental conditions, simulate the behavior of a breakwater including an actual piled up, which involves small deformation and repeated deformation, and proceeded with the study, and succeeded in grasping the characteristics of the resistance from the piled up. In the future, this will be basic data for constructing a verification formula for the resistance of the piled up against the collapse of the embankment body.

(From left) Professor Hidenori Takahashi, Dr. Dai Kurihara