2006 Volume 62 Issue 2 Pages 519-528
This study conducted out unconfined compression test and constant stress direct shear test for an unsaturated non-plastic silty soil with high soil suction. High soil suction was applied to all of soil specimens using vapor pressure technique. The cohesion obtained from unconfined compression tests increased with the soil suction. The constant stress direct shear test data sets, however, described that the cohesion remained constant in widely high soil suction ranges. The cohesion obtained from direct shear test was larger than that obtained from unconfined compression test. It was clear that the difference of shear process affected relationship between cohesion and suction in high soil suction ranges.
