Abstract: The soft clay of marine originis widely deposited in Hangzhou area. The marine clay is characterized as high compressibility, poor permeability, low bearing capacity, and specific structural properties. The soft clay depositions are adversely affected theengineering construction, so that it is necessary to study engineering properties of this type of soil. This paper first summarizes the microstructure and chemical compositions of type of soil, then a series of laboratory onedimensional consolidation tests were performed on undisturbed soil samples from Xiaoshan District of Hangzhou City. Other index properties of this type of soft soils were also tested and the relationship between the compressibility and index properties were statistically established, especially, the relationship between liquid index and the compressibility.

Key words: Soft Clay, Structured Clay, Liquid Index, Compression Index