[M-IS06] ジオパーク、ジオサイト、石造文化財の保存修復：風化プロセスとダメージアセスメント

[MIS06-02] Physical and mechanical properties for damage assesment of Taya Cave rocks, central Japan

*小口 千明¹、秋元 友理奈²、田村 裕彦³、坂根 海征¹ (1.埼玉大学大学院理工学研究科、2.埼玉大学工学部、3.田谷の洞窟保存実行委員会)

キーワード：物理的性質、力学的性質、田谷洞窟

Taya cave, an artificial cave in a hill in south Yokohama, was excavated from the Kamakura period through the late Edo period. There are many sculptures and bas-reliefs on the surface of the cave wall made of soft rock which deposited in Pleistocene. Those sculptures has been suffering from weathering and deterioration, especially exfoliation of the wall and ceiling. In this study, for the purpose of conservation and restoration of sculptural murals, rock physical properties were investigated to assess the current situation. As a result, the possibility of surface exfoliation is considered to be affected by moisture difference, whereas the possibility of collapse of ceilings or floors between stairs becomes higher if too much water infiltrate.