Abstract
On offshore disposal site, alluvial clay layer is frequently used as the bottom hydraulic barrier. The layer thickness of hydraulic barrier should be larger than a regulated value, and must not be decreased by the settling and impact of sea-reclaimed wastes. Knowing the settling phenomena of reclaimed wastes is very important to grasp the influences of offshore constructions on the ambient environment. Although the numerical analysis methods for such phenomena have been developed in recent years, it is difficult to develop the appropriate analysis. Therefore the numerical analysis approach for the materials settling in water freely has been carried out. The target of this paper is the reproducibility of the numerical analysis approach using MPS (Moving Particle Semi-implicit) method and the numerically-analyzed results obtained by MPS method are compared with experimental results.
As a result, it is clear that the MPS method, a type of particle method, is able to express the settling situations of not only single particle but also multiparticle to some extent. The appropriate settling velocity cannot be calculated directly due to the limited capacity of current available computer. However, there is a feasibility to extrapolate a certain level of settling velocity from analysis results of several different interparticle distances.
