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

Bouri, Djamel Eddine; Krim, Abdallah; Brahim, Abdelkader; Arab, Ahmed

doi:10.2478/sgem-2019-0027

Cited by 12 publications

(6 citation statements)

References 36 publications

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“…However, these equations do not consider the effect of water on the sand. The authors of previous studies have found that the more water there is in the soft ground, the lower the shear resistance is [23][24][25]. This fact shows that the shear resistance F 2 applied to a wheel on water-containing soft ground, such as the seabed, is smaller.…”

Section: Methodsmentioning

confidence: 93%

“…Geotechnics 2024, 4, FOR PEER REVIEW the lower the shear resistance is [23][24][25]. This fact shows that the shear resistanc plied to a wheel on water-containing soft ground, such as the seabed, is smaller.…”

Section: Problems Of Scallop Measurement With Wheeled Robots On the S...mentioning

confidence: 99%

“…To achieve such a design, research on the relationship between fixed wheels and water-containing soft ground surfaces is necessary. Although there are studies in the literature related to compression and shear force measurement tests on water-containing ground surfaces, there is a lack of research on the forces exerted by fixed wheels on this type of ground [23][24][25]. Therefore, in this study, we focused on the interaction between fixed wheels and the water-containing ground and carried out experiments to confirm the anchoring capacity of wheels acting on this type of ground to better understand this interaction.…”

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confidence: 99%

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An Anchoring Capacity Study Focused on a Wheel’s Curvature Geometry for an Autonomous Underwater Vehicle with a Traveling Function during Contact with Loose Ground Containing Water

Ofuchi,

Fujiwara,

Iizuka

2024

Geotechnics

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The current scallop fishery sector allows many scallops to remain in specified fishing zones, and this process leads to heavy losses in the sector. Scallop fishermen aim to harvest the remaining scallops to reduce their losses. To achieve this, a fisherman must understand the scallop ecology on the seafloor. In our previous study, we proposed a method for measuring scallops using wheeled robots. However, a wheeled robot must be able to resist disturbance from the sea to achieve high measurement accuracy. Strong anchoring of wheels against the seafloor is necessary to resist disturbance. To better understand anchoring performance, we confirmed the wheel anchoring capacity in water-containing sand in an experiment. In this experiment, we towed fixed wheels on water-containing sand and measured the resistance force acting between the wheel and the sand. Afterward, we considered the resistance force as the wheel anchoring capacity on the water-containing sand. The experimental results capture the tendency for the anchoring capacity of sand with/without water to increase with sinkage. The results also demonstrate that the anchoring capacity of water-containing sand is lower than that of non-water-containing sand. However, the results indicate that when the wheels possess lugs, their presence tends to increase the wheels’ anchoring capacity in water.

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Section: Methodsmentioning

confidence: 93%

Section: Problems Of Scallop Measurement With Wheeled Robots On the S...mentioning

confidence: 99%

mentioning

confidence: 99%

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An Anchoring Capacity Study Focused on a Wheel’s Curvature Geometry for an Autonomous Underwater Vehicle with a Traveling Function during Contact with Loose Ground Containing Water

Ofuchi,

Fujiwara,

Iizuka

2024

Geotechnics

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“…This, in turn, leads to an increase in the shear strength. Some authors, [2,3,4,5,6] showed that the shear strength reduces with fines added. Other researchers [7,8] have shown that the shear strength of sand increases with the increase of the fines content.…”

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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“…(Sun et al, 2022) studied the shear strength of compacted bentonite and found that soil moisture content affected the shear strength of bentonite during aging, with a lower value occurring at a moisture content of 24%. (Bouri et al, 2020) conducted direct shear tests on sandy soils with varying densities and reported that moisture content significantly affected shear strength. In addition, the cohesion and the angle of internal friction decreased as the moisture content increased.…”

Section: Introductionmentioning

confidence: 99%

Effects of moisture content on strength and compression properties of foundation soils of cultural relics in areas flooded by the Yellow River

Yao

Bao

et al. 2023

Front. Mater.

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This study investigated the effects of soil moisture content on the strength and deformation properties of the foundation soils of cultural relics. Our goal is to inform the formulation and implementation of the repair scheme for cultural relics above the foundation soils and help protect cultural relics. Soil samples with five different moisture contents were prepared and used in unconfined compression, triaxial, and consolidation tests. Several mechanical parameters were determined under different soil moisture contents: failure morphology, compressive strength, compressive modulus, and compressibility coefficient. Based on the test results, the soil cohesion and angle of internal friction were obtained using Mohr’s circle. Regions where the mechanical parameters were particularly sensitive to moisture content were located during the consolidation test. These were also the regions where the soil’s compressive modulus declined rapidly, which was detrimental to the overall stability and safety of overlying structures. The internal structure and particle size distribution of the foundation soils supporting cultural relics were determined by scanning electron microscopy. Constitutive parameters of soils were determined by the triaxial test and consolidation test. It was also found that when the soil moisture content exceeded the optimal level, the foundation soils were very likely to pose a risk to the safety of the overlying cultural relics. The moisture content of foundation soils supporting cultural relics deserves special attention in engineering practice.

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

Cited by 12 publications

References 36 publications

An Anchoring Capacity Study Focused on a Wheel’s Curvature Geometry for an Autonomous Underwater Vehicle with a Traveling Function during Contact with Loose Ground Containing Water

An Anchoring Capacity Study Focused on a Wheel’s Curvature Geometry for an Autonomous Underwater Vehicle with a Traveling Function during Contact with Loose Ground Containing Water

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

Effects of moisture content on strength and compression properties of foundation soils of cultural relics in areas flooded by the Yellow River

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