Laboratory study on undrained shear behaviour of overconsolidated sand–silt mixtures: effect of the fines content and stress state

Mahmoudi, Youcef; Taiba, Abdellah Cherif; Belkhatir, Mostefa; Arab, Ahmed; Schanz, Tom

doi:10.1080/19386362.2016.1252140

Cited by 30 publications

(4 citation statements)

References 30 publications

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“…The existence of fines in the sand can alter the mechanical behaviour of the sand, such as the resistance to liquefaction, the angle of shearing resistance at both peak and critical state (Seed and Lee, 1966). Previous studies showed that there exists a certain relationship between the angle of shearing resistance and fines content (Cabalar, 2011;Zuo and Baudet, 2015;Benahmed et al 2015;Mahmoudi et al, 2018;Xiao et al, 2017). And also the empirical formulation is helpful for the calculation of the preliminary design of small projects (Wichtmann et al, 2015).…”

Section: Final Fines Content-dependent Angle Of Shearing Resistance A...mentioning

confidence: 99%

A modified subloading Cam-clay model for granular soils subjected to suffusion

Wang

Takahashi

2021

Geomechanics and Geoengineering

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Suffusion, one of the modes of internal erosion, occurs when fine particles are detached under hydraulic force.More fine particles are washed out with the void growth, which subsequently causes the failure of earthworks. At present, constitutive models considering suffusion are mostly established through DEM simulations and constitutive models that can capture the main features of eroded soils are quite limited. This study aims to establish constitutive equations to model the mechanical behaviour of soils subjected to suffusion by using drained triaxial experimental data. The modified subloading Cam-clay model incorporated with the normal yield surface for the eroded soil is proposed, which can express the variation of the normal yield surface with the loss of fine particles.The determination method of the erosion-related model parameters is also proposed. The erosion-related model parameters are estimated through empirical equations with curve-fitted parameters. Finally, the capability of this modified model is demonstrated through the comparisons with experimental results.

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Section: Final Fines Content-dependent Angle Of Shearing Resistance A...mentioning

confidence: 99%

A modified subloading Cam-clay model for granular soils subjected to suffusion

Wang

Takahashi

2021

Geomechanics and Geoengineering

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“…1. Various studies were carried out on the sand of Chlef, we cite some work of Arab et al [4], Belkhatir et al [10], Belkhatir et al [11], Benssaleh et al [13], Della et al [21], Djafar Henni et al [22], Hazout et al [24], Mahmoudi et al [27]. Clean sand was mixed with 10, 20, 30 and 40% fines to obtain a sand-silt mixtures.…”

Section: Laboratory Test Program 21 Tested Materialsmentioning

confidence: 99%

Shear strength of compacted Chlef sand: effect of water content, fines content and others parameters

Bouri

Krim

Brahim

et al. 2020

Studia Geotechnica Et Mechanica

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This paper presents a laboratory study of the combined effect of the water content and fines content on the mechanical behaviour of Chlef sand in a medium dense state (RD = 65%) and dense state (RD = 80%). Several mechanical parameters were evaluated such as shear strength, cohesion and friction angle at different water content w = 0, 1, 2 and 3% and different fines content Fc = 0, 10, 20, 30 and 40%. The test results showed that the shear strength of Chlef sand decrease with the increase fines content Fc = 0 to 40%, our tests result also showed that the water content has a significant influence on the shear strength which decreases with the increase in the water content w = 0 to 3%. The fines content and the water content have a significant influence on the mechanical parameters c and φ. Cohesion increases with the percentage of fines and decreases with the increase of the water content while the friction angle decreases with the increase the fines content and the water content.

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“…Several other applications of the CSSM framework are available in the literature. For instance, studies on effects of frictional angle, particle breakage, and deformation on the CS properties of soils (De Bono, 2018;Kang, 2019;Nie, 2022;Taiba, 2023;Wang, 2020;Yang, 2018;Yu 2017); effects of fabric anisotropy vs isotropy (Kazem, 2022;Kolapalli et al 2023;Papadimitriou, 2019;Rahman & Dafalias 2022); the role of principal stress rotation on the critical state line Kazem, 2022); the influence of polymer on the critical state of sand (Liu, 2020), and the impact of plastic and non-plastic fines on the critical state of sand (e.g., Mahmoudi et al 2018;Papadopoulou & Tika 2008Rahman & Dafalias 2022;Talamkhani & Naeini 2018). In the domain of numerical modeling of soils, the CSSM has also proved to be accurate in predicting a wide range of soil engineering characteristics.…”

Section: Introductionmentioning

confidence: 99%

The critical state characterization of east coast sand (ECS) and calibration for use with an advanced critical state soil constitutive model

Bolarinwa

Kalatehjari

Safuan

2022

Preprint

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This paper outlines the findings of a laboratory-based study to investigate the properties and undrained flow failure behavior of East Coast Sand (ECS). ECS is a commonly encountered coastal deposit from the upper North Island of New Zealand. This work aims to derive soil parameters for an advanced constitutive soil model (NORSAND) to enable predictive analyses of flow failure potential using the critical state framework. The emphasis in the study is placed on the undrained strength behavior under static, triaxial compressive loading conditions at confining pressures in the range of typical engineering interest and for a range of soil densities considered in loosely deposited sands common to nearshore marine and estuarine environments. The research objective of establishing the basic soil properties and intrinsic advanced geomechanical properties of ECS from Auckland was achieved through laboratory experiments and matching simulations for five different aspects of its undrained behavior under static loads. It was shown that loosely deposited ECS within mean effective stresses ranging between 50kPa and 200kPa can be susceptible to expensive flow failures of structures built on or with them. Therefore, the re-engineering of ECS by adequate soil improvement is required when used in earthworks.

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Laboratory study on undrained shear behaviour of overconsolidated sand–silt mixtures: effect of the fines content and stress state

Cited by 30 publications

References 30 publications

A modified subloading Cam-clay model for granular soils subjected to suffusion

A modified subloading Cam-clay model for granular soils subjected to suffusion

Shear strength of compacted Chlef sand: effect of water content, fines content and others parameters

The critical state characterization of east coast sand (ECS) and calibration for use with an advanced critical state soil constitutive model

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