RESEARCH OF DAMAGED CONDITION BY THE 2016 KUMAMOTO EARTHQUAKE AND GROUND INVESTIGATION ON STONE WALLS AND ERATH STRUCTURES IN KUMAMOTO CASTLE

Abstract

There are a lot of valuable historical structures with stone wall in Japan. Those structures are
still active not only as roads and waterways, but also are designated as cultural properties, and in some places,
they also play an important role as a tourism resource for the region. However, the current situation is that
countermeasures against disasters are delayed like the damage of Kumamoto Castle due to the 2016
Kumamoto Earthquake. In particular, it is considered that it is important to elucidate the earthquake disaster
mechanism by the interaction between the ground and the stone wall.

In this research, the tendency of the damage of stone walls and earth structures will be clarified based on
the survey team of the Geotechnical Engineering Society and the Kumamoto Castle Research Center, and it
is discussed on the mechanism of collapse occurrence by estimating the geological structure under the several
sites in Kumamoto Castle by surface wave profiling method and so on.