Topic
Pore water pressure
About: Pore water pressure is a research topic. Over the lifetime, 11455 publications have been published within this topic receiving 247670 citations. The topic is also known as: pwp.
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TL;DR: In this article, a mathematical description of the sedimenting clay layer is given by an adaptation of Gibson's (1958) theory of consolidation of a sedimenting coal layer, and compared with experimental centrifuge results.
80 citations
TL;DR: In this article, the undrained dynamic behavior of saturated clays in cyclic triaxial tests with a variable confining pressure (VCP tests) is presented, where the deviatoric stress and confine pressure can be varied simultaneously.
80 citations
TL;DR: In this paper, the critical shear stress required to initiate surface erosion has been shown to be controlled by the structure of the soil as influenced by the pore fluid composition, which is also dependent on the composition of the eroding fluid.
Abstract: Hydraulic erosion studies were carried out with a modified rotating-cylinder apparatus on saturated Yolo loam soil at different pore fluid compositions. The critical shear stress, required to initate erosion has been shown to be controlled by the structure of the soil as influenced by the pore fluid composition. The critical shear stress, has also been shown to be dependent on the composition of the eroding fluid. The structure of the soil and the osmotic influences caused by the differences in the electrolyte concentration of the pore and eroding fluids are considered to explain the mechanism of surface erosion.
80 citations
TL;DR: In this article, a specially designed pressure plate apparatus was used to measure the residual negative pore water pressures in compacted samples of five different clays, including homogeneous clays.
Abstract: A specially designed pressure plate apparatus was used to measure the residual negative pore water pressures in compacted samples of five different clays. Samples were prepared using both static and kneading compaction. Pore water pressures at the optimum water contents varied from –4 psi to –80 psi depending on the specific surface of the soil. Pore water pressures as negative as -250 psi were measured in samples compacted only 6% dry of the optimum water content. Theoretical analysis indicated that the actual pore water pressures in unsaturated soils are unlikely to become more negative than approximately –14 psi although theoretical studies in terms of vapor pressures indicate pore water pressures as negative as –140,000 psi. It was demonstrated that the actual pore water pressures in homogeneous clays at equilibrium vary between wide limits and cannot be measured with any known technique. The requirement for equilibrium of the pore water is constant head, not constant pressure; the measured pore water pressures are those in the measuring system that are applied to reduce the head in the measuring system to the head of the pore water in the soil.
80 citations
TL;DR: In this paper, the results showed that up to the highest pressure exerted of approx. 3500 bar, the expression force hardly had any influence on the chloride and hydroxide concentration of pore solution.
79 citations