Layered elastic model for analysis of Cone Penetration Testing

Yue, Z.Q.; Yin, Jianhua

doi:10.1002/(sici)1096-9853(199907)23:8<829::aid-nag16>3.0.co;2-x

Cited by 15 publications

(5 citation statements)

References 14 publications

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“…For cone penetration in layered soils, investigations were mostly undertaken for sediments with either surface or interbedded sand layer (e.g. Meyerhof and Valsangkar 1977;Van den Berg 1994;Vreugdenhil et al 1994;Berg et al 1996;Van den Berg et al 1996;Lunne et al 1997;Yue and Yin 1999;Ahmadi and Robertson 2005;Xu and Lehane 2008). In brief, Meyerhof and Valsangkar (1977), Van den Berg (1994) and Xu and Lehane (2008) performed model tests on piles and cone penetrometers in two-and three-layer soils.…”

Section: Previous Workmentioning

confidence: 99%

Interpretation of Layer Boundaries and Shear Strengths for Soft-Stiff-Soft Clays Using CPT Data: LDFE Analyses

Zhou

et al. 2016

J. Geotech. Geoenviron. Eng.

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This paper describes a new approach for interpreting cone penetrometer data in soft-stiff-soft clay deposits. The identification of layer boundaries and interpretation of shear strength profile were of particular interest. The proposed approach was based on an extensive parametric study using large deformation finite element (LDFE) analyses, with a standard cone penetrometer penetrated continuously from the soil surface. The LDFE model has been validated against existing theoretical solutions and numerical results, with good agreement obtained. Regardless of strength ratio between two successive layers, the interface of soft-stiff layers can be identified at 0.8D (D is the cone diameter) below the kink in penetration resistance curve in the top soft layer. The interface of stiff-soft layers can be demarked at 1.3D above the kink in penetration resistance profile in the bottom soft layer. The undrained shear strength of a soft clay layer can be interpreted using a single layer approach and the resistance profile without the influence of the adjacent stiff layer. The interpretation for the interbedded stiff layer necessitates implementing a correction factor, which is shown to be a function of the

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Section: Previous Workmentioning

confidence: 99%

Interpretation of Layer Boundaries and Shear Strengths for Soft-Stiff-Soft Clays Using CPT Data: LDFE Analyses

Zhou

et al. 2016

J. Geotech. Geoenviron. Eng.

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“…In this study, Vreugdenhil et al (1994) demonstrated that the cone senses the presence of the approaching layer elastically. Yue & Yin (1999) extended this work using rigorous analytical solutions for the static responses of ring type concentrated body forces and examined soil layering effects in both compressible and incompressible soils. Van den Berg et al (1996) presented an Eulerian analysis of the cone penetration test in multi-layered soils.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the cone penetration test in layered clay

Walker¹,

Yu²

2010

Géotechnique

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This paper presents an analysis of the cone penetration test in multi-layered clays using the commercial finiteelement code Abaqus/Explicit. The von Mises yield criterion and its associated flow rule are assumed to model the plastic behaviour of elastoplastic undrained clays. An arbitrary Lagrangian-Eulerian scheme and an enhanced hourglass algorithm are adopted to preserve the quality of mesh throughout the numerical simulation. Initially, the behaviour of the penetration resistance is examined in a soil with only two layers. The bottom layer is the weaker of the two and the behaviour of the penetration resistance when the cone approaches the lower layer is studied. The investigation is then extended to study the cone penetration test in a multi-layered clay by sandwiching a weaker clay layer between two stronger clay layers. The thickness of the weaker clay layer is varied and the behaviour of the penetration resistance is studied in relation to the thickness and relative strength of the soil layers. The results are discussed with respect to the soil mechanisms that are present when the cone moves past the relevant layer boundaries so that the position of these boundaries can be determined more accurately.KEYWORDS: clays; in situ testing; numerical modelling Cette communication présente une analyse de l'essai de pénétrabilité au cône dans des argiles multicouches, en utilisant la norme aux éléments finis commerciale Abaqus/Explicit. On a supposé que le critère de fluage de von Mises, et sa règle de fluage connexe, reflètent le comportement plastique des argiles élastoplastiques non drainées. On adopte un système Lagrangian-Eulerian arbitraire, ainsi qu'un algorithme à sablier renforcé, pour conserver la qualité de la maille tout au long de la simulation numérique. Au départ, le comportement de la résistance à la pénétration est examiné dans un sol à deux couches seulement. La couche inférieure est la plus faible des deux, et on étudie le comportement de la résistance à la pénétration lorsque le cône est proche de la couche inférieure. On poursuit ensuite l'examen pour étudier l'essai de pénétrabilité au cône dans une argile multicouche, en intercalant une couche d'argile plus faible entre deux couches d'argile plus résistante. On varie l'épaisseur de la couche d'argile plus faible, et on étudie le comportement de la résistance à la pénétration relativement à l'épaisseur et à la force relative des couches de sol. On discute des résultats relativement aux mécanismes du sol présents lorsque le cône se déplace au-delà des limites des couches concernées, de façon à déterminer avec plus de précision l'emplacement de ces limites.

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“…From 1984 to present, the author has examined the threedimensional boundary-value problems of the classical elasticity in nonhomogeneous and transversely isotropic solid [5,6,[11][12][13][14][15][16][17]19,20,[77][78][79][80][81]. The solid occupies a threedimensional space of an infinite lateral extent ð -1 < x, y < þ 1Þ and a finite thickness a£z£bÞ, a semiinfinite a£z < þ 1Þ, and/or an infinite extent ð -1 < z < þ 1Þ.…”

Section: The Author's Workmentioning

confidence: 99%

Yue’s solution of classical elasticity in n-layered solids: Part 1, mathematical formulation

Yue

2015

Front. Struct. Civ. Eng.

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This paper presents the exact and complete fundamental singular solutions for the boundary value problem of a n-layered elastic solid of either transverse isotropy or isotropy subject to body force vector at the interior of the solid. The layer number n is an arbitrary nonnegative integer. The mathematical theory of linear elasticity is one of the most classical field theories in mechanics and physics. It was developed and established by many well-known scientists and mathematicians over 200 years from 1638 to 1838. For more than 150 years from 1838 to present, one of the remaining key tasks in classical elasticity has been the mathematical derivation and formulation of exact solutions for various boundary value problems of interesting in science and engineering. However, exact solutions and/or fundamental singular solutions in closed form are still very limited in literature. The boundary-value problems of classical elasticity in n-layered and graded solids are also one of the classical problems challenging many researchers. Since 1984, the author has analytically and rigorously examined the solutions of such classical problems using the classical mathematical tools such as Fourier integral transforms. In particular, he has derived the exact and complete fundamental singular solutions for elasticity of either isotropic or transversely isotropic layered solids subject to concentrated loadings. The solutions in nlayered or graded solids can be calculated with any controlled accuracy in association with classical numerical integration techniques. Findings of this solution formulation are further used in the companion paper for mathematical verification of the solutions and further applications for exact and complete solutions of other problems in elasticity, elastodynamics, poroelasticty and thermoelasticity. The mathematical formulations and solutions have been named by other researchers as Yue's approach, Yue's treatment, Yue's method and Yue's solution.

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Layered elastic model for analysis of Cone Penetration Testing

Cited by 15 publications

References 14 publications

Interpretation of Layer Boundaries and Shear Strengths for Soft-Stiff-Soft Clays Using CPT Data: LDFE Analyses

Interpretation of Layer Boundaries and Shear Strengths for Soft-Stiff-Soft Clays Using CPT Data: LDFE Analyses

Analysis of the cone penetration test in layered clay

Yue’s solution of classical elasticity in n-layered solids: Part 1, mathematical formulation

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