Filter-press technique for dredged clay deposits has been developed, and can produce large volume of dewatered clay lumps. The dewatered clay lump has volume reduction and strength gain. If this lump is used as geo-material for back-filling, the life of disposal pond will be extended.
In this project, a trail construction of revetment backfill is planned and performed in order to confirm the characteristics of dewatered clay lumps. In this paper, the outline of this trial construction is summarized, and the density of backfill and compressibility and shear behavior of dewatered clay lumps are described.