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- W2054562029 abstract "The environment of a layer of swelling, unsaturated soil is described by two quantities: The most direct choices are an overburden pressure P and a tensiometer pressure Pw. Their difference, P - ρw is the swelling pressure, ρw. The water volume fraction θ of rigid unsaturated soils depends only on ρs. The porosity f of saturated swelling soils depends only on Pw. Thus, it is convenient to regard the characteristics of general unsaturated swelling soils as dependent on ρw and ρ3. Simplifying to monotonic histories, the characteristics can be represented by two functions, θ(pw, Ps) and f(pw, Ps). Introducing Darcy's law and the continuity condition leads to solutions for steady or unsteady state profiles subject to a “unidirectional” rheological constraint (zero horizontal strain). The advantage of this approach is that all the quantities employed can be measured physically and in situ. This contrasts to the use by Philip, Bolt, and others of an “overburden potential” described by an integral over a series of states of the properties of the soil. The motivation for this simpler approach was an interest in the nature of the irreversible or hysteretic characteristic of swelling soils. Experimentally, the advantage of a system based on directly measurable quantities is obvious. Surface cracking of swelling soils is discussed in the same terms but under a different (isotropic) rheological constraint." @default.
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- W2054562029 date "1975-09-01" @default.
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- W2054562029 title "Physics of swelling and cracking soils" @default.
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- W2054562029 doi "https://doi.org/10.1016/0021-9797(75)90268-4" @default.
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