Abstract
Theories of constant-pressure consolidation are reexamined in detail. A Voigt model for constant-pressure consolidation is solved and the time factors which govern a secondary consolidation process are obtained. It is found that three kinds of retardation times exist in the solution of the Terzaghi-Voigt combined model; the first factor, Θ 1, is due to liquid flow resistance of the Terzaghi element; the second, Θ 2, is due to liquid flow resistance of the Voigt element; and the third, Θ 3, is due to creep deformation of the particulate bed. One can derive the conventional solutions of the Terzaghi-Voigt combined model for constant-pressure consolidation under the normal assumption that both Θ 1 and Θ 2 are much less than Θ 3.
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