OcrV1, Main, Exploration, bibRecord, 000F23

Spatial distribution of excess pore-water pressure due to piezocone penetration in overconsolidated clay

Identifieur interne : 000F23 ( Main/Exploration ); précédent : 000F22; suivant : 000F24

Spatial distribution of excess pore-water pressure due to piezocone penetration in overconsolidated clay

Auteurs : Taijun Kim [Corée du Sud] ; Nak-Kyung Kim [Corée du Sud] ; Mehmet T. Tumay [États-Unis, Turquie] ; Woojin Lee [Corée du Sud]

Source :

Journal of geotechnical and geoenvironmental engineering [ 1090-0241 ] ; 2007.

RBID : Pascal:07-0535183

Descripteurs français

Pascal (Inist)
- Essai sol, Sol surconsolidé, Argile, Essai laboratoire, Pression pores, Pression eau, Essai pénétration, Etude expérimentale, Répartition spatiale, Etude théorique, Modèle théorique.

English descriptors

KwdEn :
- Clay, Experimental study, Laboratory test, Overconsolidated soil, Penetration test, Pore pressure, Soil test, Spatial distribution, Theoretical model, Theoretical study, Water pressure.

Abstract

This paper presents the results of an analysis of the spatial distribution of the excess pore-water pressure induced by piezocone penetration into overconsolidated clays. From the experimental results obtained for moderately and heavily overconsolidated clays, it was observed that the excess pore-water pressure increases monotonically from the piezocone surface to the outer boundary of the shear zone and then decreases logarithmically, approaching zero at the outer boundary of the plastic zone. It was also found that the size of the shear zone decreases from approximately 2.2 to 1.5 times the cone radius with increasing overconsolidation ratio (OCR), whereas the plastic radius is about 11 times the piezocone radius, regardless of the OCR. The expressions developed in this study based on the modified Cam clay model and the cylindrical cavity expansion theory, which take into consideration the effects of the strain rate and stress anisotropy, provide a good prediction of the initial pore-water pressure at the piezocone location. The method of predicting the spatial distribution of excess pore-water pressure proposed in this study is based on a linearly increasing Δu_shear in the shear zone and a logarithmically decreasing Δu_oct, and was verified by comparing the pore-water pressure measured in overconsolidated specimens in the calibration chamber.

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<term>Pression eau</term>
<term>Essai pénétration</term>
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<front><div type="abstract" xml:lang="en">This paper presents the results of an analysis of the spatial distribution of the excess pore-water pressure induced by piezocone penetration into overconsolidated clays. From the experimental results obtained for moderately and heavily overconsolidated clays, it was observed that the excess pore-water pressure increases monotonically from the piezocone surface to the outer boundary of the shear zone and then decreases logarithmically, approaching zero at the outer boundary of the plastic zone. It was also found that the size of the shear zone decreases from approximately 2.2 to 1.5 times the cone radius with increasing overconsolidation ratio (OCR), whereas the plastic radius is about 11 times the piezocone radius, regardless of the OCR. The expressions developed in this study based on the modified Cam clay model and the cylindrical cavity expansion theory, which take into consideration the effects of the strain rate and stress anisotropy, provide a good prediction of the initial pore-water pressure at the piezocone location. The method of predicting the spatial distribution of excess pore-water pressure proposed in this study is based on a linearly increasing Δu<sub>shear</sub>
 in the shear zone and a logarithmically decreasing Δu<sub>oct</sub>
, and was verified by comparing the pore-water pressure measured in overconsolidated specimens in the calibration chamber.</div>
</front>
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Spatial distribution of excess pore-water pressure due to piezocone penetration in overconsolidated clay

Spatial distribution of excess pore-water pressure due to piezocone penetration in overconsolidated clay

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri