Packing Density and Overconsolidation Ratio Effects on the Mechanical Response of Granular Soils

Mahmoudi, Youcef; Taiba, Abdellah Cherif; Hazout, Leila; Belkhatir, Mostefa; Baille, Wiebke

doi:10.1007/s10706-019-01061-2

Cited by 18 publications

(4 citation statements)

References 36 publications

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“…In more detail, Desrues and co-workers [1,2] performed a series of biaxial and triaxial tests on dense and loose Hostun sand specimens and showed that their mechanical behavior including strain localization occurrence is affected by the initial void ratio of the sample. This effect was also recognized by [3,4] when predicting the undrained shear strength of sand-silt mixture and granular soil. The initial state was further explored in terms of particle size gradation and the influence of fine contents on the mechanical strength of granular soils by both experimental and numerical research [5][6][7].…”

Section: Introductionmentioning

confidence: 62%

“…Among them, the initial void ratio is a crucial factor that governs the mechanical response of granular materials under loading. It is well known that the initial compacting level of a granular sample affects the shear strength of the material [1][2][3][4][5][6][7]. In more detail, Desrues and co-workers [1,2] performed a series of biaxial and triaxial tests on dense and loose Hostun sand specimens and showed that their mechanical behavior including strain localization occurrence is affected by the initial void ratio of the sample.…”

Section: Introductionmentioning

confidence: 99%

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Effects of intergranular friction and grain size distributions on the initial void ratio of granular sample

Nguyen

2023

STCE

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This paper investigates the influence of intergranular friction and grain size distributions on the initial void ratio of a granular sample subjected to isotropic compression loading. In the field of geomechanics, besides the loading path and evolution of microscopic properties, the initial void ratio is a crucial and key factor that governs the mechanical behavior of geomaterials. By using Discrete Element Model (DEM) performed on an idealized 2D assembly of disks, this study demonstrates that the initial void ratio can be affected by several parameters during isotropic compression stage. By varying a wide range of intergranular coefficients of friction and grain size distributions, our numerical results suggest that increasing the intergranular coefficient of friction during the isotropic compression phase leads to looser samples. Furthermore, when the diversity of grain sizes is rich, smaller grains can move and occupy voids, thereby increasing the density of the granular sample. A power-lawrelationship is then proposed that connects the minimum void ratio and the diversity degree of the sample.

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Section: Introductionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Effects of intergranular friction and grain size distributions on the initial void ratio of granular sample

Nguyen

2023

STCE

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“…Previous studies have evaluated the effects of factors such as the sampling method, particle size and shape, confining pressure, stress history, degree of saturation and loading conditions on the liquefaction of uniformly graded mixtures [5][6][7]. In these studies, it was assumed that a fines content comprised of nonplastic silt or finer sand in combination with coarse sand will decrease the liquefaction potential because the fines would fill the voids among the coarse grains, which decreased the void ratio of the mixture as well as increasing its density [8].…”

Section: Introductionmentioning

confidence: 99%

The role of fines content and particle size ratio on the load-bearing structure of binary granular soil: A micromechanical approach

Nia,

Bayesteh,

Khodaparast

2024

Preprint

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The particle size ratio and fines content are the most important factors influencing the behavior of binary graded granular soil. Previous studies have focused more on the effects of the fabric, particle size distribution and fines content on the macroscopic response of binary mixtures. The effect of the fines participation factor (β) on the load-bearing structure of binary graded soil and estimation of this parameter (β) from the macro and micromechanical perspectives have rarely been evaluated. The present study used a micro-mechanical approach and DEM to evaluate the global void ratio (e), intergranular void ratio (e*) and the contribution of the fines content to the load-bearing structure of binary graded soil during drained and undrained tests. The effects of the particle size ratio, fines content, initial packing density and confining pressure on β also have been evaluated. The results showed that e* is a more reliable parameter than e for interpreting the behavior of binary graded soil. In a binary graded mixture that contains coarse and fine grains, β increased non-linearly and lower values of β were obtained for denser samples. With an increase in the particle size ratio, the values of β and microscopic parameters such as the coarse-fine (C-F) particle contact decreased. The decrease in the C-F particle contact caused a decrease in β. An equation is proposed to estimate β based on the fines content and particle size ratio of the binary mixtures.

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“…This strongly proves the scientific feasibility of using the centrifugal model test to determine the underwater dumping density. Mahmoudi et al [5] conducted a series of undrained triaxial tests on remolded saturated sand samples with different overconsolidation ratios. The results indicated that the initial relative density significantly controlled the undrained shear strength and that an increase in the initial relative density led to an amplification of the expansibility, resulting in an increase in the undrained shear strength [6].…”

Section: Introductionmentioning

confidence: 99%

Research on the density of underwater sand and gravel fillings based on geotechnical centrifugal tests

Li,

Wei,

Shen

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The density of underwater dumping materials plays a major role in cofferdam engineering designs. However, it is difficult to accurately measure the density of underwater dumping materials. This study investigated the influence of particle size distribution of granular materials on the density of underwater filling materials. Considering the underwater dumping project of a hydropower station dam in the Han River as the prototype condition, several underwater dumping density centrifugal tests were conducted on sand gravel and sand mixtures. Based on the CKY200 large-scale geotechnical centrifuge, a single-embankment vertical-blockage underwater filling test device in a centrifuge field was developed. The results demonstrated the relationship between the compactness of the dumping body and the grading of loose particles, depth of dumping, and height of the upper loading. This indicates that the underwater filling material has a higher compactness and can reach a dense state. When the grading is poor, the compactness decreases. The greater the depth of filling, the greater the compactness. When vertical compression was applied to the upper part of the backfill, the compactness of the backfill, particularly in shallow areas, was significantly improved. These results provide insights for the design and construction of underwater dumping water conservation systems.

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Packing Density and Overconsolidation Ratio Effects on the Mechanical Response of Granular Soils

Cited by 18 publications

References 36 publications

Effects of intergranular friction and grain size distributions on the initial void ratio of granular sample

Effects of intergranular friction and grain size distributions on the initial void ratio of granular sample

The role of fines content and particle size ratio on the load-bearing structure of binary granular soil: A micromechanical approach

Research on the density of underwater sand and gravel fillings based on geotechnical centrifugal tests

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