Numerical and experimental study on the effect of fiber reinforcement on the shear strength and hydraulic conductivity of Chlef soil

Brahimi, Abdelkader; Bouri, Djamel Eddine; Boutaraa, Zohra; Nougar, Benali; Krim, Abdellah; Chemmam, Mohammed; Arab, Ahmed

doi:10.1007/s41062-022-01011-7

Cited by 4 publications

(2 citation statements)

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“…Different relative densities mean different dry densities. In previous studies on fiber-reinforced sand with different dry densities, it was stated that the stiffness and bearing capacity of the fiber-reinforced soil with higher dry density were higher [65]. In addition, the interfacial movement between the fiber and the soil increases significantly with increasing relative stiffness [54].…”

Section: The Effect Of Relative Density On Soil Behaviormentioning

confidence: 99%

The Effect of Different Fiber Reinforcement on Bearing Capacity under Strip Foundation on the Sand Soil: An Experimental Investigation

Aksu Alcan,

Çelik

2023

Applied Sciences

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The aim of this study is to investigate the bearing capacity-settlement behavior of strip footing settling on sand soil randomly reinforced with glass fiber, basalt fiber, macromesh fiber, and four different hybrid fiber additives in which these fibers are used together. Model tests were carried out in the laboratory on the strip footing and placed on the unreinforced and reinforced sand with different fibers. In the study, model tests were carried out on seven types of randomly reinforced soils by using glass, basalt, macrame, and mixtures of these fibers as reinforcement. In the model tests, two different fiber contents, 1% and 2%, and two different fiber lengths, 24 mm and 48 mm, were used. Tests were carried out with Dr = 30% and 50% relative density, and reinforcement depths 1B, 2B, and 3B were selected. In addition, the photographs taken during the test were analyzed with the particle image velocimetry (PIV) method and the displacements on the soil were examined. As a result of the reinforced and unreinforced model tests, the highest ultimate bearing capacity was measured as 680 kPa from the tests with Dr = 50% relative density, 48 mm length, 2% contents, and 3B depth macromesh fiber reinforced. In hybrid fibers, the highest ultimate bearing capacity was measured as 495 kPa, with Dr = 50% relative density, 48 mm length, 2% contents, and 2D depth micromesh and basalt fiber-reinforced tests. In the reinforced tests, it was concluded that the most effective fiber on bearing capacity is macromesh fiber. It can be seen that in the PIV analysis, as the fiber additive increased, the settlements made by the foundation decreased under the same pressure. It has also been observed that adding reinforcement to the soil transfers the stresses occurring in the soil to a wider area.

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Section: The Effect Of Relative Density On Soil Behaviormentioning

confidence: 99%

The Effect of Different Fiber Reinforcement on Bearing Capacity under Strip Foundation on the Sand Soil: An Experimental Investigation

Aksu Alcan,

Çelik

2023

Applied Sciences

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“…[14] Found that the susceptibility to the deformability of silty and clayey sands increases with the increase of the clay content rather than the silt content. [15] Found that the grow in the shear strength of silty sands is implied by the grow in their permeability. Several studies show that the shear strength of sand reduces with the increases of fines content in the soil [16, 17, 18, 19, 20, 21, 22, 23, 24, and 25].…”

Section: Introductionmentioning

confidence: 99%

Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand

Nougar,

Brahimi,

Bouri

et al. 2024

J. Eng. Exact Sci.

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This study was carried out to describe the mechanical behavior of different materials in terms of shear strength, cohesion and friction. For this purpose, an experimental shear tests were carried out. The soils used for the preparation of the samples were the Chlef sand, Chlef silt and M’zilla clay and a mixture composed of 50% of silt and 50% of clay. The soils were prepared by mixing Chlef sand with fines content of silt, clay or clay silt ranging from 0, 10, 20, 30 and 40%. The tests were conducted on sand samples prepared at a relative density of 20% representing a loose state and subjected to three normal stresses of 100, 200 and 400 kPa. All the tests were conducted at constant displacement rate of 1.00 mm/min. From the obtained results, it can be seen that the clean sand showed the highest shear strength at a small strains. At large strains, sands with 30% clay rather than 30% clay silt showed the highest shear strengths respectively. More contracted sands have the greatest increased maximum shear strengths. The sand with clayey silt, at a fine content of 20%, develops the most increased cohesion, among the other silty-clayey sands, together with the most reduced shear strength in elastic behavior. The sand with 40% of silt content develops a greater internal friction angle, however, the other silty sands, showed reduced shear strength, at the same behavior. To validate these findings, numerical simulations were performed on sand-silt mixtures using the hypoplastic model. The results indicated that the hypoplastic model accurately predicts the shear behavior of sand-silt mixtures in direct shear test, providing realistic insights into the effects of fines on the mechanical properties of the soil. Keywords: Sand, Silt, Clay, Fines Content, Shear Strength, Friction, Cohesion.

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Implementation of an Advanced Constitutive Models for Fine-Grained Soils

et al. 2023

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Numerical and experimental study on the effect of fiber reinforcement on the shear strength and hydraulic conductivity of Chlef soil

Cited by 4 publications

References 50 publications

The Effect of Different Fiber Reinforcement on Bearing Capacity under Strip Foundation on the Sand Soil: An Experimental Investigation

The Effect of Different Fiber Reinforcement on Bearing Capacity under Strip Foundation on the Sand Soil: An Experimental Investigation

Application of the hypoplastic model for validating direct shear tests to investigate the impact of fines on the behavior of chlef sand

Implementation of an Advanced Constitutive Models for Fine-Grained Soils

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