Predicting the small strain shear modulus of coarse-grained soils

Liu, Xingyang; Zou, Degao; Liu, Jingmao; Zheng, Bowen

doi:10.1016/j.soildyn.2020.106468

Cited by 21 publications

(8 citation statements)

References 54 publications

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“…They also concluded that the G max of pure sands and pure gravels is almost unaffected by d 50 , instead of increasing with d 50 for well-graded sand-gravel mixtures. During the subsequent investigation (Liu et al, 2021), they found that C u and d 50 have significantly opposite effects on the G max of the sand-gravel mixtures, which contradicts the conclusion of Menq (2003).…”

Section: Introductionmentioning

confidence: 89%

Experimental study on shear wave velocity of sand-gravel mixtures considering the effect of gravel content

Cheng

Fang³

et al. 2023

Front. Earth Sci.

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Sand-gravel mixtures are special engineering geological materials between soils and fractured rocks. This study performs a series of bending element tests to systematically investigate the shear wave velocity (Vs) of the sand-gravel mixtures, establish an effective evaluation method, and assess the influence of relative density and effective confining pressure on mixtures with a wide range of gravel contents. The results showed that the shear wave velocity increases and then decreases with the increase in gravel content and increases with the rise in relative density and effective confining pressure. Furthermore, a shear wave velocity prediction model is proposed in this study based on the intergranular contact state theory, including the stress parameter (n) and skeleton void ratio. The stress parameter can be described by a power function considering the uniformity coefficient. The model serves as a reference guide for estimating the shear wave velocity of sand-gravel mixtures with a wide range of gravel contents.

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Section: Introductionmentioning

confidence: 89%

Experimental study on shear wave velocity of sand-gravel mixtures considering the effect of gravel content

Cheng

Fang³

et al. 2023

Front. Earth Sci.

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“…Recognizing that relative density is practically a rather weak parameter due to the difficulty in determining maximum and minimum void ratio [48,49], researchers are often inclined to adopt void ratio as an index of the deformation characteristics of granular materials [7,8,50,51]. To illustrate the effect of size polydispersity, E50 of samples with various GSDs is plotted versus the void ratio e in Fig.…”

Section: Correlations For Deformation Modulusmentioning

confidence: 99%

“…However, the correlation with either alone cannot fully capture the gradation-dependence. For instance, Wichtmann and Triantafyllidis [7] concluded that the small-strain shear modulus was significantly dependent on Cu but independent of D50, while Liu et al [8] showed that both Cu and D50 had pronounced effects on the small-strain shear modulus. These contradictory findings led to different empirical prediction models for the small-strain shear modulus, suggesting that the D50 and Cu, derived respectively from only one and two points on a GSD curve, is too crude to characterize size polydispersity.…”

Section: Introductionmentioning

confidence: 99%

Revealing Correlations Between Size Polydispersity and Deformability of Idealized Granular Materials using DEM

Han

Zhang

et al. 2022

Preprint

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This paper numerically investigates the deformability of granular materials with emphasis on the influence of particle size polydispersity. Triaxial compression tests are simulated using distinct element method (DEM) on a set of samples consisting of uncrushable spheres following a variety of grain size distributions. The compressibility under isotropic compression and deformation modulus during triaxial shearing are examined to correlate with the size polydispersity. The results show that, given the same relative density, the compressibility and deformation modulus is insensitive to the grain-size conditions under consideration, but the void ratio is significantly influenced by the size polydispersity. A grading index proposed by the authors is employed to quantify the size polydispersity and correlate with the deformation parameters. Compared with the more conventional coefficient of uniformity, this grading index exhibits a better performance for faithfully representing size polydispersity. An empirical prediction model for the deformation modulus is developed to account for the effect of the size polydispersity, in addition to the confining pressure and void ratio. Although this model exhibits a fair performance for predicting the deformation modulus, it is considered promising in accounting for the effect of size polydispersity. At the microscale, a unique correlation is found between the deformation modulus and the mechanical average coordination number, which can be estimated from the effective void ratio.

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“…With particle diameter D50 and the void ratio are constant. Results presented that a G max value decreases as the C u value increases during the effective con ning stress is constant (Liu. X et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Comparison between Theory and Experiment for the Dry Density and Shear Stress Variations with the different Depths (groundwater level variations)

Doan

2023

Preprint

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Comparison between Theory (Numerical simulation by the PLAXIS 3D – Finite element method) and Experiment measurement by the Viet Nam Standard “TCVN 4195:2012; TCVN 4199:1995” for the Dry Density and Shear Stress Variations with the different Depths (groundwater level variations) were shown clearly with the particular process. Results show the Dry unit weight (density) increases gradually with the increase of different depths. The maximum deviation of the dry unit weight (dry density) and Shear Stress according to the constant loading (P) at the different depths, which included in the dry density (γk) value of 16.26 kN/m2 and shear stress (τmax) 72.7 kN/m2 at 4.3m; whereas shear stress (τmax) 41.6 kN/m2; 27.1 kN/m2; 91.8 kN/m2; 98.2 kN/m2; 82.9 kN/m2 at 7.0m; 18.0m; 27.0m; 30.3m, and 39.6m; respectively. Results show the small deviation together, but some values presented changing remarkably. So research results enough reliable reference in the geotechnical engineering and researchers in the future.

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Predicting the small strain shear modulus of coarse-grained soils

Cited by 21 publications

References 54 publications

Experimental study on shear wave velocity of sand-gravel mixtures considering the effect of gravel content

Experimental study on shear wave velocity of sand-gravel mixtures considering the effect of gravel content

Revealing Correlations Between Size Polydispersity and Deformability of Idealized Granular Materials using DEM

Comparison between Theory and Experiment for the Dry Density and Shear Stress Variations with the different Depths (groundwater level variations)

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