Abstract
Noto Peninsula Earthquake that occurred at 16:10 on January 1, 2024 caused extensive damage to the quays of the Port of Nanao. Although the No. 2 quay in the Ota area (Section B: a sheet pile quay wall with vertical anchor pile, Section C: a sheet pile quay wall with a group of anchor piles ) and the cargo quay (a sheet pile quay wall with vertical anchor pile) in the same area were constructed at about the same time and have the same quay structure that is sheet pile quay wall, there were significant differences in their behavior during the earthquake. Therefore, the damage to the quaywalls was verified by field survey, and the factors causing the difference in seismic behavior were examined, focusing on the countermeasures against liquefaction, anchor type structural differences and soil characteristics. Next, a two-dimensional seismic response analysis was conducted using the earthquake motion simulation of the Noto Peninsula earthquake, and it was shown that the behavior and deformation of both quay walls due to the earthquake can be reproduced by setting proper parameters. Furthermore, this study shows a method for estimating the bending moment of the sheet pile based on the results of the detailed investigation by diving, and this study evaluated the soundness of the sheet piles based on the results of this estimation method. Finally, there were generally similar results by comparing the bending moment between the estimation method and the reproduction analysis, and the validity of the soundness evaluation was verified.
