EXAMINATION OF THE EARTHQUAKE SETTLEMENT EVALUATION OF RIVER EMBANKMENT USING 2D DYNAMIC EFFECTIVE STRESS ANALYSIS

Abstract

 In the guideline for seismic design of river structures, static analysis is usually applied to calculate the deformation of a river embankment. Dynamic effective stress analysis is advisable in the cases that large measures are conducted or detailed examination is required due to land use status. However, dynamic effective stress analysis has not yet established as a stably applicable method because it needs special knowledge and has technical difficulty in setting parameters. In this paper, we studied points improve accuracy of dynamic effective stress analysis based on the detailed investigation of the ground at Naruse River R0.8km and Yoshida River R16km and the simulated behavior of the embankments during the 2011 off the Pacific coast of Tohoku Earthquake.