Abstract
During the recent big earthquakes in Japan, significant damage was caused in the port and harbor facilities, especially in reclaimed lands. The survey was extensively carried out on the damages during the recent three big earthquakes in Hokkaido Island; i.e., 1993 Kushiro-oki, 1993 Hokkaido Nansei-oki, and 1994 Hokkaido Toho-oki Earthquakes. And the damages were closely examined based on the current seismic design code for quay wall. As a result, it is clarified that the occurrence and the intensity of the damage are strongly correlated to the occurrence of the liquefaction in the backfill grand.
