Insight into the Effects of Gradation on the Pore Pressure Generation of Sand–Silt Mixtures

Belkhatir, Mostefa; Schanz, Tom; Arab, Ahmed; Della, Noureddine; Kadri, Abdelkader

doi:10.1520/gtj20130051

Cited by 29 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A larger relative density means smaller porosity and smaller porosity means increased cohesion and friction as a result of increased contact area between fiber and soil particles. Similar observations were made by Belkhatir et al [66] on fiber-reinforced soil. The authors reported that a high relative density causes a further increase in the effective contact area between soil particles and fiber.…”

Section: The Effect Of Relative Density On Soil Behaviorsupporting

confidence: 89%

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

View full text Add to dashboard Cite

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.

show abstract

Section: The Effect Of Relative Density On Soil Behaviorsupporting

confidence: 89%

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

View full text Add to dashboard Cite

show abstract

“…It arose from a thick series of Eocene sand layers that fill karst pockets on the western side of Vercors at Hostun (Drôme, France). Chlef sand is a medium sand with rounded grains (alluvial sand) and a medium diameter of: D 50 = 0.61 mm (Della and Arab [9]; Belkhatir et al [10]). Rass sand is also a rounded sand (alluvial sand) with a medium diameter of D 50 = 0.39 mm (Arab [11]; Krim et al [12]).…”

Section: Materials Testedmentioning

confidence: 99%

“…Specific density of the solid grains D 10 Effective grain diameter D 50 Mean grain size of sand D Initial diameter of sample C u Coefficient of uniformity (C u = D 60 /D 10 ) CSR Cyclic stress ratio (CSR = q m /2 · p c ) e max Maximum …”

mentioning

confidence: 99%

Characteristics of Cyclic Shear Behavior of Sandy Soils: A Laboratory Study

et al. 2016

View full text Add to dashboard Cite

This paper presents a laboratory study of the influence of relative density on the liquefaction potential of a sandy soil using the triaxial apparatus. The study is based on undrained triaxial tests performed on samples at an initial relative density RD = 15, 50 and 65 % under a confining pressure of 100 kPa using a dry deposition method. Samples were subjected to quasi-static undrained cyclic tests. The paper is composed of three parts. In the first part the used materials and their characteristics are presented. The second part is devoted to the experimental procedures and the device used. The third part investigates the influence of relative density on the liquefaction potential of the three sands (Hostun Rf, Chlef and Rass). This study also explores the influence of particle size on the liquefaction potential. The test results indicate that consistent results were obtained and show clearly that increasing the relative density leads to an important improvement in the liquefaction resistance of sand. This effect is very pronounced when the initial relative density increases from 50 to 65 %.

show abstract

“…a short time), the excess pore water pressure built up rapidly and as a result decreased the undrained strength of the soil. When the excess pore water pressure reaches the initial consolidation pressure [1], the initial liquefaction occurs and at the same time the effective stress decreases to zero. Empirical evidence from [2][3][4] [5] and [6] on the factors contributing to the liquefaction resistance of sand such IOP Publishing doi:10.1088/1755-1315/1103/1/012026 2 as the percentage of fines, plastic or non-plastic fines, effective confining pressure, degree of saturation, relative density, void ratio, and earthquake frequency loading are well presented.…”

Section: Introductionmentioning

confidence: 99%

Liquefaction Resistance of Sand-Kaolin Mixtures: Effect of Sand Sizes

Othman

Marto

Uzuoka³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Grading characteristics, particle sizes, particle shapes and fines content are the factors contributing to liquefaction incidents besides major factors such as earthquake magnitude. Recent publications and reports from incidents of liquefied or potential liquefied soils show some evidence that the size of sand particles, particle shapes and grading characteristics will increase or decrease the liquefaction resistance. However, to date the results are still disputed and need to be expanded. Hence, the aim of this paper is to investigate the effects of different sizes of sand in sand-kaolin mixtures on liquefaction resistance. The liquefaction resistance of sand mixtures with the application of different sizes of sand-coarse sand, medium sand and fine sand mixed with fines (kaolin) content (0%,10%, 20%, 30%, and 40%) are investigated through a cyclic triaxial test under undrained conditions. Each reconstituted sample was prepared with a target relative density of 15% (loose state) and 5% of initial moisture content for the triaxial test. Effective consolidation pressures of 100 kPa were applied on the cyclic triaxial tests. Microstructure analysis on the soil samples were carried out to explain the behaviour of the samples tested. The centrifuge test was carried out on selected samples so that the behaviour of the soils in actual conditions could be visualised. The results clearly show that the liquefaction resistance was reduced at reduced sand sizes. At a constant fines content for each parent sand, the liquefaction resistance decreased with an increase of fines content up to certain percentage, then increased thereafter. The fth decreased from 30% to 20% of fines content with a decrease in parent sand sizes. The outcomes of this study are useful to advance the understanding of the behaviour of sand mixtures with different sizes of sand for design purposes.

show abstract

Insight into the Effects of Gradation on the Pore Pressure Generation of Sand–Silt Mixtures

Cited by 29 publications

References 17 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

Characteristics of Cyclic Shear Behavior of Sandy Soils: A Laboratory Study

Liquefaction Resistance of Sand-Kaolin Mixtures: Effect of Sand Sizes

Contact Info

Product

Resources

About