2024 年 10 巻 15 号 p. 461-466
Many facilities, including port facilities, were damaged by a major earthquake that occurred almost 100 years ago (the Great Kanto Earthquake of 1923). At the Port of Yokohama, the block-type quay walls of the reclamation site at sea were almost completely destroyed. However, historical facts remain that some quays have escaped damage. The authors attempted to determine the factors that caused this difference using current model testing techniques. Centrifuge model tests simulating the quay walls at the site were performed to reproduce the damage caused by the earthquake. The foundation ground of the quay wall that did not collapse consisted of soft alluvium with a rubble mound. The presence or absence of a collapse was considered to be caused by differences in the foundation, and the shaking table tests were implemented under different foundation conditions. Consequently, the events that occurred at the site were successfully reproduced.
