| The 2004 Niigataken-Chuetsu Earthquake and 2007 Noto Peninsula Earthquake caused considerable damage to the embankments of mountainside roads, and suspended the road traffic function for a long period. Because it is extremely important to minimize damage to the road traffic function and ensure prompt recovery in earthquake-affected areas, it is requested to develop a procedure to evaluate seismic performance of the embankments and a design method for aseismic countermeasures that take road function and the recoverability of road embankments into consideration.Based on the above background, this research aims to propose a rational, economic evaluation method for seismic performance of the mountainside road embankments and a design method for aseismic countermeasures for the embankments. In this study, ground surveys and case analyses of embankments damaged by the Noto Peninsula Earthquake and the series of the dynamic centrifuge model tests were carried out so as to examine factors that affected the seismic performances of the mountainside road embankments.In case of the Noto Peninsula Earthquake, It was found that seepage water inside embankments might cause their large-scale disruption. It was also clarified that terrain and geological factors that affected the stability of road embankments during an earthquake. Based on the results from dynamic centrifuge model tests, the effects of embankment height and construction materials, as well as ground stability, on the disruption of embankments were highlighted. |
