La conservation des tumuli historiques à travers les techniques et méthodes d’ingénierie géotechnique

Abstract

[6th International Young Geotechnical Engineers’ Conference (iYGEC6] 16(Sat.) -17(Sun.) September 2017: Global Education Center for Engineers (Building No. 38), Seoul National University, Seoul, Republic of KoreaTumuli are burial mounds constructed more than 1300 years ago in many places in Japan. They have been conserved as historical cultural heritages. However many of them are seriously damaged by precipitation, earthquakes and human activities. The authors have hence been studying damage mechanism and countermeasures against the damage using geotechnical engineering techniques. The damage of tumuli can be divided into three types, namely 1) destruction of earth mounds, 2) water infiltration into stone chambers and 3) deterioration of decorated stone chambers due to hydrothermal environment change. In the present paper, geotechnical investigations into these types of damage are discussed. Rainfall induced slope failures in a tumulus mound is provided as an example of 1) and the instability of the mound is quantitatively explained. As a countermeasure against 2), water shielding by a capillary barrier is successfully introduced to the restoration of a damaged tumulus. Temperature control in stone chambers is required to suppress 3) hence the influence of a tumulus mound on the chamber temperature is evaluated with a basic numerical analysis