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PERMEABIUTY CONSOLIDATION CHARACTERISTICS OF SATURATED CONESIVE SOIL AND ITS MICROMECHANICS

Feng Xiaola Shen Xiaoyu  
One of the most important assumptions in Terzaghi's umdimeosional consolidation theory is that the compressibility coefficient(av)and parmeability coefficient(K)are constant in the process of dissipation of excess pole water pressure. It doesn't hold water for saturated cohesive soil especially marine mud. In order to make experiment for saturated cohesive soil, the author designeed a special dedvice for ko consolidation test. On the basis of data lecorded from this test, the changing rules of pore ratio(e), av, k as well as consolidation coefficient (ev)controlled by them were obtained. Then the study is done on the micromechanics of permeability consolidation using other test data. At last, a new expression on principle of effective stress is proposed for the establishment of a unidimensional consolidation model which tallies better with reality.
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