DEFORMATION MECHANISM OF THE EDOGAWA LEVEE AT THE TIME OF GREAT KANTO EARTHQUAKE OF 1923

Abstract

The Central Disaster Prevention Council formulated the "Guidelines for Emergency Measure Activities in the event of Tokyo Metropolitan Epicentral Earthquake" in April, 2007. The guidelines does not assume flooding by dike failure, which leads to a concern that the action plans could be greatly affected in the case of flooding by dike failure. In this study, reproduction analysis was conducted for the Edogawa Levee that was damaged at the time of Great Kanto Earthquake of 1923, to analyze the factors that affect the subsidence of the levee at the time of earthquake. ALID, which is one of the static deformation analysis methods, was used for the analysis. This report examines the importance of setting the initial conditions such as saturated zone for dam body , and the effective seismic countermeasures.