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

Abstract

 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.