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전용백,권준환,백홍렬 대구대학교 과학기술연구소 1998 科學技術硏究 Vol.5 No.1
This study about consolidated undrain test are performed for the different preconsolidation stress, the void ratio and shear strength parameter versus of the clay which make use of the Data Logger and Computer System and the existing theories are compared with existing theories. The summary of experiments as follows 1. The preconsolidation stress and shear strength appeared as r= σ_(e)tan 11.46˚+ σtan 19.44˚ this equation enables to know the shear strength when the preconsolidation strength and the confining stress are know. 2. The shear strength parameter decrease in proportion to void ratio at the degree of over consolidation, and the void ratio decrease in proportion to preconsolidation stress, so the change of preconsolidation ratio is equal to the change of shear strength parameter. The preconsolidation stress has no effect on the internal friction angle but has direct effect on the change of cohesive force, and the relation between preconsolidation stress and cohesive force is c= 0.2288P- 0.0541. 3. The internal friction angles are equal at the same sample by the Mohr-Coulomb's theory, but in this experiment, it was appeared that the cohesive strength decrease in proportion to void ratio through the variation of void ratio and the internal friction angle has nothing to do with void ratio.