점성토 준설매립지반의 자중압밀과 대기건조 영역분리에 의한 표층고결 촉진공법

Quick Surface Strengthening of Soft Dredged Clay Fill by Dividing the Layer into Self Consolidation and Desiccation

The use of dredged soft marine clay is increasing due to a shortage of coarse material available. This paper presents a stabilization method that can increase shear strength of the surface layer of a dredged clay deposit at dates much earlier than usual. The desiccation of the upper soft 1-2m layer can be accelerated by interrupting water seeping from its bottom with impervious geotextile. Just below the geotextile, enough pervious material is provided so that the underlying deposit can be drained through it. This scheme is proved to be effective through theoretical analysis.