EVALUATION OF ATTENUATION OF IMPACT ON BENTONITE-BASED BUFFER UNDER CONSTRUCTION

Abstract

In in-situ compaction method, where the material is directly compacted in the disposal pit, possible damage to the surrounding rock and waste package due to the impact of compaction are issues of concern. While an evaluation of the effect of impact is necessary, the analysis based on Finite Elemental Method (FEM) has not yet been achieved with sufficient accuracy. Experiments were carried out and data obtained for the acceleration damping characteristics of the buffer material. The results were then used with an analytical model in order to improve the accuracy of the analysis. By comparing this with data obtained from full-scale experiment, it was possible to confirm the validity of the analysis that takes acceleration damping characteristics.