航空写真を用いた東日本大震災の浦安市における液状化被害分析

抄録

In the 11 March 2011 Tohoku, Japan earthquake, widespread liquefaction occurred in Urayasu city, Chiba prefecture, and it caused serious damage to wood-frame houses, underground pipelines and other structures. In this kind of situation, it is effective to estimate damage distribution quickly for emergency response purposes. But early damage estimation of structures due to liquefaction is very difficult because these damages do not appear clearly on the ground surface. On the other hand, it is comparatively easy to access the degree of liquefaction using sand boils and ground subsidence, which can be observed from the ground or air. Thus in this study, the relationships between these visible effects due to liquefaction and various damage are investigated using aerial photographs.