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, the effects of soil hydrological processes on the isotopic compositions of soil water and how these effects affect interpretations of tree ring data in isotopic dendroclimatology were discussed.
190 citations
TL;DR: A review of constitutive models for unsaturated soils is presented in this paper, focusing on the fundamental principles that govern the volume change, shear strength, yield stress, water retention and hydro-mechanical coupling.
190 citations
TL;DR: In this paper, the pore-water pressure that develops when an electric field is introduced into a soil mass is shown to depend upon the voltage distribution and the ratio of the electrokinetic and hydraulic permeabilities of the soil.
Abstract: The pore-water pressures that develop when an electric field is introduced into a soil mass are shown to depend upon the voltage distribution and the ratio of the electrokinetic and hydraulic permeabilities of the soil. Thus, the magnitude of the pressures at a point depends upon electrode geometry. The time necessary for the development of these pore-water pressures is shown to be predictable by use of the theory of consolidation. The rate of pore-pressure development is dependent upon the hydraulic permeability of the soil and not upon its electrokinetic permeability. Whether soil stabilization occurs as a result of the development of negative porewater pressures or destabilization occurs due to positive pore water pressures, depends upon the boundary conditions at the electrodes. Secondary effects, from the point of view of large-scale engineering works, are associated with alterations in soil pH and conductivity. Laboratory and field test data are presented to substantiate the arguments presented.
190 citations
TL;DR: In this article, the authors present lithium, magnesium and silicon isotope ratios from pore waters and soils from a well-characterised Histic Andosol in south-west Iceland.
189 citations
TL;DR: In this paper, a depth-integrated model accounting for pore water pressure dissipation is presented, which makes it possible to model flowslide problems with a high mobility at the beginning, the landslide mass coming to rest once pore pressure dissipate.
Abstract: Hazard and risk assessment of landslides with potentially long run-out is becoming more and more important. Numerical tools exploiting different constitutive models, initial data and numerical solution techniques are important for making the expert’s assessment more objective, even though they cannot substitute for the expert’s understanding of the site-specific conditions and the involved processes. This paper presents a depth-integrated model accounting for pore water pressure dissipation and applications both to real events and problems for which analytical solutions exist. The main ingredients are: (i) The mathematical model, which includes pore pressure dissipation as an additional equation. This makes possible to model flowslide problems with a high mobility at the beginning, the landslide mass coming to rest once pore water pressures dissipate. (ii) The rheological models describing basal friction: Bingham, frictional, Voellmy and cohesive-frictional viscous models. (iii) We have implemented simple erosion laws, providing a comparison between the approaches of Egashira, Hungr and Blanc. (iv) We propose a Lagrangian SPH model to discretize the equations, including pore water pressure information associated to the moving SPH nodes.
189 citations