Effects of Friction and Thickness on Long-Term Consolidation Behavior of Osaka Bay Clays

Watabe, Yoichi; Udaka, Kaoru; Kobayashi, Masaki; Tabata, Takechiho; Emura, Tsuyoshi

doi:10.3208/sandf.49.824

Cited by 2 publications

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References 2 publications

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“…He also discussed the eŠects of other factors, such as the trimming eŠect and specimen size. Recently, the issue of side friction was re-visited by Watabe et al (2008a) who studied its eŠect on the long-term consolidation behavior of clays.…”

Section: Effects Of Boundary Conditions and Sample Disturbancementioning

confidence: 99%

Observation of Geomaterial Behavior

Koseki

Kawaguchi

2010

Soils and Foundations

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By focusing on the mechanical behavior of geomaterials observed by means of laboratory tests, we have attempted to survey the 50 year history of relevant studies presented in Soils and Foundations and to introduce some of the recent research outcomes. First, the developments of a variety of testing apparatuses and procedures are summarized, with a particular focus on the eŠects of boundary conditions and sample disturbance, local and microscopic measurements, and the observation of small strain behavior as well as large strain behavior. Second, studies on the properties of sandy soils, clayey soils, other problematic soils and cemented soils including aged soils and soft rocks, respectively, are reviewed brie‰y. Third, because it is a research topic that has had the attention of so many researchers for so long, and some remarkable progress has been achieved recently, studies on viscous behavior, including the dependency on the loading rate and creep deformation, are overviewed.

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Section: Effects Of Boundary Conditions and Sample Disturbancementioning

confidence: 99%

Observation of Geomaterial Behavior

Koseki

Kawaguchi

2010

Soils and Foundations

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Viscosity and secondary consolidation in one-dimensional loading

Joseph

2014

Geotechnical Research

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Viscosity and secondary consolidation effects are observed in one-dimensional compression, but it remains unresolved if viscous effects occur during the primary consolidation phase and consequently whether the end of the primary consolidation (EOP) line is unique and the H2 scaling law applies. Dynamical systems soil mechanics suggests that viscosity and secondary consolidation each have a separate physical basis. Viscous behaviour is due to strain rate dependence of the coefficients of friction at interparticle contacts as they slide against each other in simple friction, and occurs during both primary consolidation and secondary consolidation. Secondary consolidation is the continued deformation of the soil structure after excess pore pressure has dissipated, as small numbers of particles move at random shear strains, in a Poisson process, to new final positions. The near constant C(αe)/Cc ratio is due to the form of the equation that expresses this ratio and because very few particles move to new positions during secondary consolidation. Strain rates for typical geotechnical problems being pseudo-static, viscous effects in the field are small, and the current design practice of using the EOP curve and C(αe) to calculate compression settlements appears reasonable. Empirical evidence suggests that adsorbed water layers control strain-rate-related effects.

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Effects of Friction and Thickness on Long-Term Consolidation Behavior of Osaka Bay Clays

Cited by 2 publications

References 2 publications

Observation of Geomaterial Behavior

Observation of Geomaterial Behavior

Viscosity and secondary consolidation in one-dimensional loading

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