Yusuke KOISHI
Damage analysis of volcanic ash embankment collapse in Tohoku-Pacific Ocean Earthquake
In the offing earthquake of the Tohoku district Pacific Ocean, a banking collapse large-scale in Aizuwakamatsu-shi, Fukushima occurred. Although the trace of liquefaction was checked in collapsed banking, since banking material was a pyroclastic sediment, we were anxious about the influence of particle crushing. The pyroclastic flow sediment is broadly distributed over national every place, and there are also many application examples to artificial banking. In this research, particle size change of the banking material by compressive load or shear which is not carried out was investigated using the local extraction ground, and also the strength property was investigated by static and repetition load examination. It clarifies about the characteristic of the particle crushing in the banking concerned, and also reports a residual deformation analysis result in case of the earthquake of the banking collapse example using the acquired mechanical characteristi
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