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堆積岩の原位置水分量測定に与える温度の影響

In-situ moisture monitoring methods for the sedimentary rocks as affected by temperature

佃 明恵*; 小松 満*; 岸 敦康

Tsukuda, Akie*; Komatsu, Mitsuru*; Kishi, Atsuyasu

堆積岩地層で空洞掘削に伴う不飽和領域の発生状況や人工バリアの性能をモニタリングする原位置測定手法の適用性に着目し、実際の試験調査坑道で採取されたコアを対象として水分量測定を行った。測定方法には、高周波の電磁波を用いて同軸ケーブル先端での反射特性より複素誘電率を測定するFDR-V法を適用し、声問層のボーリングコアに対する温度変化の影響について検討した結果、現状での測定結果に及ぼす影響は低いことが判明した。

In this study, with the goal of applicability an in-situ measurement technique for monitoring generation of the unsaturated zone around a drift and performance of the artificial barrier, a set of water content measurement was carried out for the core samples collected during the excavation of pilot survey drift in a sedimentary rock formation. For the drill core collected Koetoi layer, FDR-V method was applied. FDR-V measures complex permittivity from reflection characteristic in the coaxial cable tip using an electromagnetic wave with high frequency. The results showed that the effects of the temperature on the measurement were insignificant.

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