Damage and Its Characteristics of Soma Port Due to the Earthquake off the Coast of Fukushima Prefecture in 2022

Abstract

In the March 16, 2022 off the coast of Fukushima Prefecture earthquake, five different types of quay walls were damaged by the strong motion of the seismic intensity of 6 upper at Soma Port in Fukushima Prefecture, and the damage was different for each type of structure. This paper compares the horizontal displacement of the quay wall and the subsidence behind it for each type of quay wall based on the results of post-earthquake surveys. The results showed that the steel pipe sheet pile quay wall had the smallest displacement and was the most tenacious structural type. On the other hand, re-liquefaction was observed where areas that liquefied in 2021 liquefied again during the 2022 earthquake. Therefore, laboratory tests were conducted on the sand eruptions collected in the wharf to clarify their physical properties.