CONSOLIDATION ANALYSIS OF CLAY RECLAMATION TO COPE WITH THE UNCERTAINTY IN REAL SOLID VOLUME

Abstract

Reclamation by dredged clay is a self-weight consolidation process with increasing thickness. In order to predict the elevation of reclaimed ground and to predict the future settlement, it is absolutely necessary to have the reliable information on the rate of soil solid volume discharged into the reclaimed land. However, dredging is planned and recorded based on the total volume of soil including pore water. If there is a lack of test data on the water content of discharged dredged soil, the solid volume becomes uncertain and the prediction becomes impossible. The authors proposed a procedure of determining the rate of solid volume based on the soil investigation of already completed part of reclaimed soil and back analysis of the reclamation. The practical use of the proposed procedure was verified by the case record of New Kitakyushu Airport construction on the disposal pond.