Seismic damage of residential land and land evaluation using an embankment map

Abstract

Around major cities, the housing development called the bedroom town was developed, and the residential land development that downplayed safety was carried out with green destruction by a chaotic creation plan. In the residential areas, developed in the suburbs of Sendai around 1955-1965, a lot of houses suffered from geotechnical damage during the Great East Japan Earthquake. In this study, we made an embankment preparation map by comparing a digital map made from an old planning map and a current digital elevation map. Furthermore, we developed a map database of construction sites for preventative measure and a map database of applications for the dismantling of damaged property for locations under consideration for public development that were damaged by the Great East Japan Earthquake. We reviewed and compared prices of the inheritance tax street value by an embankment preparation map and a database of applications for the dismantling damaged property. It is reasonable to make different evaluations between residential lands that need ground improvement and residential lands that don't need ground improvement because they have been evaluated in the same way whether damage or not. We considered residential land evaluation formulae (street value evaluation formulae) that evaluates value of residential land according to ground vulnerability measurements. In conjunction with proposing the consideration of ground structural characteristic correction to residential land price evaluation, we calculated a ground structural characteristic correction.