STUDY ON THE INFLUENCE OF THE MEASUREMENT FREQUENCY OF DRY DENSITY ON EVALUATION OF THE WATER PROOF PERFORMANCE OF COMPACTED BENTONITE-MIXTURE-SOIL

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  • 砂・ベントナイト混合土の遮水性能評価における締固め密度の測定頻度の影響

Abstract

<p> For quality control during construction of engineered barriers at radioactive waste disposal facilities using bentonite, applying a general quality control method for embankment construction, the frequency of in-situ density testing is about once per several hundreds to several thousands m3. Therefore, it is necessary to evaluate the impervious performance from limited data after construction. In order to evaluate the effect of measurement frequency, we created a three-dimensional spatial distribution model of hydraulic conductivity using geostatistical techniques, and performed seepage flow analysis and particle tracking method. As a result, the minimum required measurement frequency was found to suppress the variation of the analysis results.</p>

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