Airport is one of the most important infrastructures in fatal earthquake disaster from the standpoint of the support of emergency medical services, recovery activities, and refugees from the earthquake-stricken area. Therefore, airline is required restarting commercial logistic operation with 50% of service level within three days after the earthquake, for the purpose of supporting various recovery activities after earthquake.
　In this study, a full-scale experiment using controlled blasting technique conducted at the Ishikari Bay New Port (Ishikariwan-Shinko) in Hokkaido Island, Japan, is discussed. The purpose of experiment is to assess the performance of prototype airport facilities subject to the liquefaction due to a large earthquake. This paper describes the following three points: a) investigation on the liquefaction behavior of air port facilities, b) estimation of the effects of some kinds of countermeasures with low cost and c) evaluation of health-monitoring technique, non-destructive tests, physical tests and other explorations to judge the influence of liquefaction.