2019 Volume 75 Issue 2 Pages 198-215
Nowadays, the cut and embankment slopes of expressway are damaged due to heavy rainfall and large earthquakes. On the other hand, the expressway facilities are worried about the age deterioration since about 40% expressway facilities has been used for more than 30years. Firstly, the authors showed the four cases of major damages in the view point of the inducements and predispositions. In addition to this, the predispositions of the slope damage such as a topography, a geology, and a geomaterial composed which greatly affects the damage were analyzed with using total 213 damage data obtained from the experience for recent 25 years (1994-2017) in Tohoku district. As the results, it was found that vulnerable slopes have a certain characteristics and that the drainage capacity of the cut and embankment slope affects the vulnerability of slopes.
