Abstract
This paper studies an importance of yielding characteristic and an effect of the microstructure on mechanical behavior of Osaka Upper-Most Pleistocene marine clay. Clay samples undertaken by the block-sampling technique are found to have higher quality than Pleistocene clay samples obtained by the tube-sampling technique. The following conclusions are obtained from the present study: 1. Yielding properties of Osaka Pleistocene marine clays from the two sites are anisotropic. 2. The Pleistocene marine clay has a linkage structure with significant bonding, which induces more brittle behavior, higher compressive strength and higher stiffness than the disturbed and reconstituted samples.
