2017 Volume 12 Issue 1 Pages 19-31
In order to dispose of dredged clay effectively, it is important to plan the dredged clay disposal based on the settlement prediction in advance and to understand accurately the acceptable quantity of dredged clay in the disposal pond. However, it is still a great challenge to understand properly the consolidation characteristics of the dredged clay for the settlement prediction. The purpose of this paper is, in the disposal pond at Kobe airport, to calculate the settlement of the clay using the volume ratio f represented uniformly by logf for the consolidation characteristics of clay (compressibility, permeability and consolidation velocity) and to compare the calculation with the measurements of various properties. Soil improvement was done in the disposal pond by the vertical drain using the difference in the water head after the dredged clay was disposed of several times, and then additional dredged clay was disposed of. The authors performed calculations with the proposed consolidation method against the bed of dredged clay with the complex complicated disposal history. It is reported that the results agree mostly with the measured settlement, pore water pressure and the water content at the site.
