Effect of Geotextile Reinforcement on Shear Strength of Sandy Soil: Laboratory Study

Denine, Sidali; Della, Noureddine; Dlawar, Muhammed Rawaz; Feia, Sadok; Canou, Jean; Dupla, Jean Claude

doi:10.1515/sgem-2016-0026

Cited by 26 publications

(8 citation statements)

References 30 publications

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“…Geogrid is a geosynthetic material used as reinforcement in construction works, which increases the bearing capacity and equalizes displacements in sand conditions. [1][2][3][4] Geogrid typically includes a mixture of polypropylene (PP), high-density polyethylene (HDPE), and polyester (PET). Geogrid can be either flexible or rigid in nature; the manufacturing process, manufacturing technology, and the behavior of grids will vary depending on the type of synthetic materials used.…”

Section: Introductionmentioning

confidence: 99%

“…The results obtained reveal that a high value of confining pressure can restrict the sand dilatancy when shearing. [4] A series of consolidated undrained triaxial compression tests for investigating the shear behavior of geotextilereinforced clay were conducted. The experimental results revealed that during consolidation, non-woven geotextile as a permeable material reduced the time of consolidation; however, it induced a higher volume change.…”

Section: Introductionmentioning

confidence: 99%

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Using Triaxial Tests to Determine the Shearing Strength of Geogrid-Reinforced Sand

Skuodis

Dirgėlienė

Medzvieckas

2020

Studia Geotechnica Et Mechanica

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Geogrids are widely used in civil engineering projects to reinforce road and railway structures. This paper presents research on the shearing strength of soil samples that have been reinforced with geogrids. The relationship between soil and geogrids is explored and evaluated by modeling the mechanical behavior of heterogeneous materials. For the purposes of this research, data obtained from tests of unreinforced sand samples with triaxial cells were compared with the data obtained from tests of reinforced sand samples. It was found that the shearing strength for reinforced samples was higher (from 9% to 49%) compared to unreinforced samples. Some damage to the geogrid was detected during the experiment, and for this reason, the same tests were numerically simulated for both unreinforced samples and samples reinforced with geogrids. Numerical simulations revealed the main reasons for damage to the geogrids during triaxial testing.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using Triaxial Tests to Determine the Shearing Strength of Geogrid-Reinforced Sand

Skuodis

Dirgėlienė

Medzvieckas

2020

Studia Geotechnica Et Mechanica

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“…Several works have been carried out in the laboratory on soil samples to study the influence of the addition of reinforcement under several types and forms on the behavior of the soil. [14,15,21,22,24,30,36] Reinforcing soils using tension resisting elements is an attractive means of improving the performance of soil in a cost effective manner. The use of random discrete flexible fibers mimics the behavior of plants roots of surface vegetation and contribute to the stability of soil mass by adding strength to the near-surface soils in which the effective stress is low.…”

Section: Introductionmentioning

confidence: 99%

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

Benziane

Della

Denine

et al. 2019

Studia Geotechnica Et Mechanica

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The inclusions of geosynthetic materials (fibers, geomembranes and geotextiles) is a new improvement technique that ensures uniformity in the soil during construction. The use of tension resisting discreet inclusions like polypropylene fibers has attracted a significant amount of attention these past years in the improvement of soil performance in a cost-efficient manner. A series of direct shear box tests were conducted on unreinforced and reinforced Chlef sand with different contents of fibers (0, 0.25, 0.5 and0.75%) in order to study the mechanical behavior of sand reinforced with polypropylene fibers. Samples were prepared at three different relative densities 30%, 50% and 80% representing loose, medium dense and dense states,respectively, and performed at normal stresses of 50, 100 and 200 kPa. The experimental results show that the mechanical characteristics are improved with the addition of polypropylene fibers. The inclusion of randomly distributed fibers has a significant effect on the shear strength and dilation of sandy soil. The increase in strength is a function of fiber content, where it has been shown that the mechanical characteristics improve with the increase in fiber content up to 0.75%, this improvement is more significant at a higher normal stress and relative density.

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“…One plausible reason would be that the increasing number of geotextile layers may have caused the cohesion of reinforced soil to increase due to the layers having interlocked with the soil particles, thus having reduced the number of contact points between the soil grains [58]. The increase in cohesion would have led to a corresponding increase in both the elastic modulus and undrained shear strength parameters of the soil.…”

Section: Elastic Modulus and Undrained Shear Strength Parametersmentioning

confidence: 99%

Strength Enhancement of Geotextile-Reinforced Fly-Ash-Based Geopolymer Stabilized Residual Soil

Jayawardane

Anggraini

Li-Shen

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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Soils in their natural form are often deemed unsatisfactory to be directly used as a construction material for their respective applications. Under such circumtances, employment of ground improvement techniques to better suit the soil for its function is typically the most economical approach. Consequently, the present research investigated into the beneficial effect of modernized soil treatment techniques, i.e., geopolymer stabilization using fly ash as the precursor and geotextile reinforcement, on the strength enhancement of natural residual soil. A series of unconsolidated undrained (UU) triaxial compression tests were carried out to assess variation of geopolymer stabilized residual soil strength based on the varying number of geotextile layers, geotextile arrangement, and confining pressures. It was found that the increase in the number of geotextile layers resulted in a corresponding rise in soil strength and stiffness. It was also discovered that placement of geotextile layers at sample regions which suffered the maximum tensile stress-strain during loading was more effective compared to random placement. Soil strength was observed to reduce with increasing confining pressure which demonstrated the effectiveness of utilizing geotextile reinforcement at greater depths below the ground to be less. Failure patterns showed that while unreinforced soil resulted in failure along a shear plane at an approximate angle of 45 + φ/2 (φ: angle of internal friction), reinforced samples demonstrated a bulging failure where the soil between adjacent layers of geotextiles appeared to bulge. The findings deemed the employment of geopolymer stabilization and geotextile reinforcement on natural residual soil very effective with regards to the enhancement of soil strength and stiffness.

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Effect of Geotextile Reinforcement on Shear Strength of Sandy Soil: Laboratory Study

Cited by 26 publications

References 30 publications

Using Triaxial Tests to Determine the Shearing Strength of Geogrid-Reinforced Sand

Using Triaxial Tests to Determine the Shearing Strength of Geogrid-Reinforced Sand

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

Strength Enhancement of Geotextile-Reinforced Fly-Ash-Based Geopolymer Stabilized Residual Soil

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