Effects of Inclination of Houses induced by Liquefaction on Health Problem of Residents

－Case Study in the 2016 Kumamoto Earthquake－

Abstract

At 21:26 JST on April 14, 2016, an Mw 6.2 earthquake struck Kumamoto City in Kyushu, Japan. Field investigation and inspection were conducted to study an effect of inclination of a house due to liquefaction on health problems of the residents. A tilt angle of 68 houses and buildings in liquefied sites of Kumamoto City was measured. Based on the measurements, the degree of inclination is seem to be related to the type of the houses and buildings. In addition, it is also found that the tilt direction of the houses and buildings is related to the terrain as well. Furthermore, a questionnaire survey was conducted about one year after the earthquake. The results of this survey revealed the actual condition of inhabitant's health problems due to tilted houses induced by liquefaction.