Effect of randomly distributed polypropylene fiber reinforcement on the shear behavior of sandy soil

Benziane, Mehdi Missoum; Della, Noureddine; Denine, Sidali; Sert, Sedat; Nouri, Said

doi:10.2478/sgem-2019-0014

Cited by 23 publications

(14 citation statements)

References 38 publications

(37 reference statements)

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“…In contrast, the fiber strips initially orientated at 120 • did not improve and, in some cases, even weakened the sand, as indicated by the peak strength ratios smaller than or equal to 1.0. Similar results were also obtained by [12,14]. As mentioned in Section 1, the influence of initial orientation angle of fiber on sand strength may be explained by the stress mobilization in fibers.…”

Section: Peak Strengthsupporting

confidence: 85%

The Influence of Discrete Fibers on Mechanical Responses of Reinforced Sand in Direct Shear Tests

Nhema

Han

et al. 2021

Applied Sciences

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To investigate the influences of discrete fiber strips on the mechanical properties of reinforced sand, a series of direct shear tests were conducted. A method to strictly control the initial orientation of fiber strips in specimen preparation was developed. Under the same normal pressure, the peak strength of sand specimens was proportional to the fiber content and was inversely proportional to the fiber initial orientation angle. The influences of initial fiber orientation on peak strength may depend on the stress mobilization in fibers. When the fiber strips distributed at a certain orientation angle were subjected to tensile stress in shearing, they could play an effective role in the peak strength gain of sand and vice versa. Due to the restriction of fibers on the volume dilation of sand specimens, the residual strength of reinforced sand also increased. However, the initial stiffness of reinforced sand was smaller than that of pure sand, which may be related to the precompression of flexible fiber strips and the density inhomogeneity of specimens induced in the specimen preparation process. In addition, the ductility of sand specimens was improved by the introduction of fiber strips, intuitively reflected by the increase in displacement failure. This may also be attributed to the restriction of fiber strips on the deformation of sand specimens.

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Section: Peak Strengthsupporting

confidence: 85%

The Influence of Discrete Fibers on Mechanical Responses of Reinforced Sand in Direct Shear Tests

Nhema

Han

et al. 2021

Applied Sciences

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“…Figures (17)(18)(19)(20) presents total displacement shading obtained from Plaxis 3D output at failure for various cases.…”

Section: E Bearing Capacity Failure Modementioning

confidence: 99%

“…The effect of using PP fiber on soil bearing capacity was investigated by [18]. The experimental results show that the addition of polypropylene fibers improves the mechanical properties.…”

Section: Introduction mentioning

confidence: 99%

Numerical Simulation of Strip Footing Behavior on Reinforced Sabkha Soil

Sadek

Bahloul

2023

SVU-International Journal of Engineering Sciences and Applicati

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Sabkha soils can be found all over the world specially, in hot arid areas. This soil is regarded as problematic because of its low bearing capacity and excessive settlement which creates problems to any type of structures. Consequently, the aim of this paper is to predict the behavior of strip footing founded on reinforced Sabkha soil using three different methods utilizing finite element method analysis. First, beneath the footing, a compacted sand layer mixed with randomly dispersed polypropylene fibers (PP) is used. Moreover, a compacted sand layer reinforced with geogrids is used. Finally, investigate the effect of using a sand-rubber mixture layer below as a foundation soil below the footing. The effects of these methods on strip footing bearing capacity and settlement were studied using the finite element method software Plaxis 2D ver. 21. Therefore, it was determined that adopting these procedures boosts the strip footing bearing capacity by a substantial amount, particularly when utilizing the first method which is utilizing the fiber reinforced sand layer over the weak sabkha soil layer. Also noticed was a reduction in soil vertical displacements under foundation for the same values of stress applied to footing.

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“…The addition of fibers increased the internal friction angle and cohesion of the clay. Benziane et al (2019) carried out a series of direct shear box tests to compare unreinforced and reinforced soil with different contents of fibers. The experimental results showed that the mechanical characteristics was improved with the addition of polypropylene fibers.…”

Section: General Properties Of Polypropylene Fibersmentioning

confidence: 99%

An investigation on the geomechanical properties of fiber reinforced cohesive soils

Ertuğrul

Canoğullari

2021

Turkish Journal of Engineering

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In recent years, the use of natural and synthetic fibers in soil improvement has become widespread in soil mechanics applications. Easy to use and low cost fibers have been the subject of many geotechnical researches in recent years. In this study, results of previous mechanical experiments performed on fiber-cohesive soil mixtures were reviewed in a systematical approach. Based on the data derived from the experimental studies available in the literature, it has been observed that various soil properties including soil strength have improved with increasing density of the fibers up to a certain level. The percentage of added fiber has a significant effect on improving soil properties. Based on statistical analysis, simple correlation relationships were suggested based on the investigated test database.

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Effect of randomly distributed polypropylene fiber reinforcement on the shear behavior of sandy soil

Cited by 23 publications

References 38 publications

The Influence of Discrete Fibers on Mechanical Responses of Reinforced Sand in Direct Shear Tests

The Influence of Discrete Fibers on Mechanical Responses of Reinforced Sand in Direct Shear Tests

Numerical Simulation of Strip Footing Behavior on Reinforced Sabkha Soil

An investigation on the geomechanical properties of fiber reinforced cohesive soils

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