2016 年 4 巻 2 号 p. 1-4
Some case studies of road embankments damaged and undamaged by the 2011 off the Pacific coast of Tohoku earthquake were conducted as the first step for the final target to rationalize the current seismic design method. The relationship between the conventional safety factor evaluated by pseudo-static analysis and the degree of actual damage was investigated based on the results from drained triaxial compression tests on retrieved fill materials. The value of the seismic coefficient, which should be employed in the conventional design method for preventing severe damage due to the recent large earthquakes, was also discussed. In addition, the applicability of Newmark’s sliding block method to the evaluation of earthquake-induced displacement of road embankments was presented.
