パドル式土質改良機による汚染土壌と薬剤の固液混合シミュレーション

抄録

Recently, a soil mixing machine has been receiving considerable attention in order to restore the contaminated soils. In the remediation sites, contaminated soils are fed into the machine and they are mixed with the liquid agent. As the liquid agent is expensive, it is necessary to obtain the mixing behavior of contaminated soils and agent, and to know the optimum operating condition in order to perform the effective remediation. However, many parameters affect the mixing behavior and experimental investigation is uneconomical and ineffective.
In this study, the mixing of contaminated soils and liquid agent was simulated by using distinct element method (DEM). In the DEM simulation, the increase of water content due to the addition of liquid agent was simulated and this result was compared with the experimental one. It was confirmed through the comparison that the model proposed here was almost reasonable.