Abstract
To utilize coastal waste landfill site on the sea effectively, installation of foundation piles through the waste layer and the natural clay barrier layer will be required to support heavy structures. But when the foundation piles penetrate the clay barrier layer, leakage of polluted water in the waste layer through the ground around the driven piles to the beneath permeable layer is concerned. In this study, a series of experiments was carried out to clarify the effects of the installation of the pile on the performance of impermeability around piles in the clay layer. As the results, it was found that if the gap was caused by the pile installation between the pile and the clay layer, it was closed immediately in the normal consolidation state, and therefore the performance of impermeability around the driven pile was ensured. Moreover, the countermeasure for fail-safe was also suggested.
