| Fibrous and high organic peat、 which is very soft and problematic soil、 is widely distributed in Hokkaido、 Japan. Hokkaido、 Japan、 has experienced major earthquakes such as the Kushiro-oki Earthquake and the Hokkaido Nansei-oki Earthquake of 1993、 the Hokkaido Toho-oki Earthquake of 1994、 and the Tokachi-oki Earthquake of 2003. These major earthquakes that occurred in Hokkaido were seen to cause severe damage to road embankments and river levees constructed on peaty ground. However、 the failure mechanism、 methods for the evaluation of earthquake resistance and the reasonable reinforcement of such embankments have not been clarified. [*]A dynamic centrifuge model test of an embankment on peaty ground was thus conducted to examine its earthquake resistance and failure mechanism. As a result、 an actual damage mode observed typically in embankments on peaty ground could be reproduced. It was revealed that the main causes of deformation was sludging of the embankment、 which was caused by the generation of excess pore water pressure at the bottom of the embankment sank in the peat layer. |
