A number of large-scale reclamations have taken place in the coastal areas of Korea. Very thick soft ground composed of marine clayey deposits is distributed along the coastal areas of Korea. More and more ground improvement has been conducted due to the rapid development of infrastructure and housing projects. As the consolidation behavioral parameters are required for the design of reclamation, the compressibility characteristics of four marine deposits were investigated by means of one-dimensional consolidation tests. This article presents results dealing with the (i) primary and secondary compression during oedometer consolidation, (ii) long-term secondary compression (creep), and (iii) correlations with index properties. The new equations obtained from correlations are presented and discussed.

The properties of sands pertaining to shear strength have been studied extensively by plane strain and triaxial tests for relative densities above 40%. Unfortunately, properties of sand have not been comprehensively studied for relative density below 40%. An experimental investigation of the shear strength of Jumunjin sand was carried out using a plane strain, triaxial and direct shear apparatus according to relative density ranges from 0 to 100%. Because of the complexity of the shear tests on coarse materials, correlations were developed that would be useful for practical purposes. This article presents a comparison of strength properties' results and their correlation with relative density.

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