Abstract: An artificial hard crust can be formed at the surface of soft soils by using soil solidification method. However, the type, component, the mixture procedure and the depth of the improvement of using these solidification agents can significantly affect the results and project construction cost. The dust induced by the quick lime also adversely affect the vegetation of adjacent soils. This paper presents a case history of solidification of a hydraulically dredged soft soils. Both the laboratory and situ testing were conducted by using various ratio of solidification agents. The results indicated that, the moisture contents reduce within the depth range of improvement with improved physical and mechanical properties. The hard layer crust with improved bearing capacity and strength could be formed quickly.

Key words: Recent Hydraulically Dredged Mucky Clay, Strength Obtained by Vane Shear Testing, Tip Resistance of Cone Penetrometer, Bearing Capacity