Secondary Compression in The Stage of Primary Consolidation

Murakami, Yukitoshi

doi:10.3208/sandf1972.28.3_169

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…Based on the test results on clay specimens of different thickness, his co-workers ͑Mesri andChoi 1979, 1985;Mesri et al 1995͒ developed a unique end-of-primary ͑EOP͒ void ratio concept for computing primary consolidation settlement of thick clay layers in the field. However, several researchers ͑e.g., Aboshi 1973;Murakami 1988;Imai and Tang 1992͒ reported that the strain at the EOP consolidation increases with the thickness of specimen. The presence of viscous effects during primary consolidation was suggested as the main cause for the nonuniqueness of EOP strain.…”

Section: Past Work On Consolidation Of Claysmentioning

confidence: 99%

“…It is, therefore, necessary to develop a model that takes into account the viscous nature of consolidation of clays ͑Mitchell 1976; Leroueil et al 1985;Crawford 1986͒. Taking into account the viscosity during primary consolidation, several constitutive models were developed in the past either as a function of time ͑e.g., Murakami 1988;Yin and Graham 1989͒ or as a function of strain rate ( ) ͑e.g., Kabbaj et al 1986͒. The main advantage of the later approach is that it does not require the initial time.…”

Section: Introductionmentioning

confidence: 99%

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Viscosity Effects on One-Dimensional Consolidation of Clay

2003

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A constitutive relationship for one-dimensional consolidation of clays is presented. It recognizes the importance of structural viscosity and yielding in controlling many of the phenomena associated with the consolidation of clays. The governing equation for the large strain consolidation of clays, incorporating the new constitutive relationship, has been solved using a finite difference technique. The computer program has been verified using laboratory experiments including those performed on an interconnected consolidometer. The laboratory tests and numerical results are used to examine many of the current hypotheses used in predicting field consolidation. The results show that the deformation of thick clays in the field are different from those predicted from a thin laboratory specimen using the square of the drainage length or the uniqueness of the end of primary consolidation concepts. The dominance of the structural viscosity during the primary consolidation stage has been shown to be the main source of the discrepancy.

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Section: Past Work On Consolidation Of Claysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Viscosity Effects on One-Dimensional Consolidation of Clay

2003

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“…These two types of deformation occur simultaneously, just after the application of load. The mechanics of time-dependent deformation behavior is complex, and various views have been presented in the literature on this subject (Vaid and Campanella, 1977;Murakami, 1988;Liingaard et al, 2004). To avoid the use of different semantics of the various researchers, in this study, the time dependent deformation during consolidation is assumed to be caused by the ''viscosity'' of the soil skeleton.…”

Section: Introductionmentioning

confidence: 99%

Time-Dependent Deformation Behavior of Jiangsu Marine Clay

Miao

Zhang

Wang

et al. 2008

Marine Georesources & Geotechnology

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In this article, the mechanical behavior of a Jiangsu marine clay was investigated by drained triaxial tests, traixial rheological tests, and one-dimensional compression and swelling tests. A visco-plastic model, the Bingham model combining two yield surfaces model, was proposed to describe the time-dependent deformation behaviors of the marine clay. The governing equation of Biot's consolidation theory for the visco-plastic soil is solved using a finite element code which incorporates the visco-plastic model. Using the finite element method, settlements of a typical embankment on the Lianxu expressway in China are calculated. Settlement calculations using the visco-plastic model are in agreement with the measured settlements in the field. The results demonstrate that the visco-plastic model is appropriate for calculating the visco-plastic deformations of Jiangsu marine clay. Theoretical and experimental studies show that the visco-plastic deformation of Jiangsu marine clay is substantial.

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