CASE STUDY ON ASEISMIC REINFORCEMENT OF AN EXISTING ROAD EMBANKMENT BY REINFORCED SOIL METHOD

Abstract

Large deformation of an embankment on the box culvert was discovered at the Tamasaka tunnel in Kobe city. The deformation at the parapet of the tunnel had steadily accumulated since August 2012. Based on the observations, a contingency plan was demanded to avoid carefully any serious hazardous events. Therefore, a scheme to stabilize the embankment with aseismic reinforcements was considered in order to improve the seismic safety against the Level-2 earthquake. In this paper, a series of geotechnical investigation, numerical analysis, the aseismic design and the counter-measures associated with this case study is in detail described.