A study on techniques applied to the construction of foundations at the confined waste disposal facilities have been conducted. As a part of the study, pile construction was demonstrated at the confined waste disposal facility reclaimed with incineration residue. Steel pipe piles were used in the demonstration. The issues were the ways to prevent the waste entrained by a pile tip, and to preserve impermeability around the pile after the construction.
The demonstration revealed that it was effective to remove the waste with a hammer grab in conjunction with casing before pile installation. Both jacking the pile with inner drilling by flight auger and driving the pile by hydraulic hammer encountered some technical troubles during pile installation. These piling methods were concluded to be relatively low applicable to the construction at the ground reclaimed with incineration residue at present.


Key Words: Confined disposal facility in coastal area, pile, landfilled waste, clay, hydraulic barrier