Analytical and experimental approaches to obtain the ultimate strength of reinforced earth elements

Khaniki, Ali Karami; Daliri, Farzad

doi:10.1007/s12205-013-0181-8

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…This phenomenon was more obvious in fine-grained sands. Similar laboratory studies and results regarding the performance of reinforced sands in triaxial shear apparatus have been reported by Moghaddas and Asakereh (2007), Khaniki and Daliri (2012), Mindiastiwi et al (2021), Skuodis et al (2020), and Yi and Du (2020) [5,6,8,17,18].…”

Section: A Review Of the Literaturesupporting

confidence: 84%

The effect of maximum diameter of geogrid-reinforced sandy soil particles on shear strength parameters

Fateh,

Goleij

2023

Eng. Res. Express

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Geogrid reinforcement is an effective method for improving the strength characteristics and bearing capacity of granular soils. The dimensional ratio of the diameter of soil particles to the mesh size of geogrid apertures can be effective on the strength performance and stress- deformation of the reinforced soil. To explore these factors, a sandy soil sample from Tonekabon (Iran) was separated into three gradations with a maximum particle diameter of 4.75, 2, and 0.425 mm, with an average relative density of about 57%. The samples were reinforced with two types of polyvinyl chloride (PVC) mesh as a geogrid, with aperture dimensions of 5 and 3 mm. All the samples were subjected to compressive loading in the triaxial shear apparatus under effective stress conditions. With a relative increase in the mesh size of the geogrid aperture to the maximum dimension of the reinforced soil grains, the internal friction angle decreased. Moreover, reinforcement of non-cohesive sandy soil caused apparent cohesion in the consolidated undrained conditions, and this was more evident with the reduction of the maximum diameter of sand particles. Decreasing the maximum diameter of the particles from 4.75 to 0.425 mm in the unreinforced and reinforced conditions caused the internal friction angle of the soil to drop by about 8%–10%. For the non-cohesive sandy soil, the results showed that soil reinforcement caused a more salient apparent cohesion in the soil with the maximum diameter of smaller particles. The sand passing through sieve #40 (0.425 mm) showed a cohesion of 0.2 to 0.34 kg/cm2 upon reinforcement with both types of meshes, while the soil lacked significant cohesion in the unreinforced conditions.

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Section: A Review Of the Literaturesupporting

confidence: 84%

The effect of maximum diameter of geogrid-reinforced sandy soil particles on shear strength parameters

Fateh,

Goleij

2023

Eng. Res. Express

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“…Khedkar and Mandal [11] compared the stress-strain curves of pure sand, single-layer reinforced sand, and double-layer reinforced sand under three confining pressure types through triaxial tests. Khaniki and Daliri [12] conducted triaxial tests on reinforced soil and analyzed the influence of confining pressure on the shear strength index of plain soil and reinforced soil. Nair and Latha [13] determined the strength and stiffness characteristics of aggregates reinforced with geogrids with different heights, on the basis of the static and cyclic triaxial test results of a granular subbase reinforced by multi-layer geogrids.…”

Section: Introductionmentioning

confidence: 99%

Triaxial Testing of Geosynthetics Reinforced Tailings with Different Reinforced Layers

2020

Materials

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To evaluate the shear properties of geotextile-reinforced tailings, triaxial compression tests were performed on geogrids and geotextiles with zero, one, two, and four reinforced layers. The stress–strain characteristics and reinforcement effects of the reinforced tailings with different layers were analyzed. According to the test results, the geogrid stress–strain curves show hardening characteristics, whereas the geotextile stress–strain curves have strain-softening properties. With more reinforced layers, the hardening or softening characteristics become more prominent. We demonstrate that the stress–strain curves of geogrids and geotextile reinforced tailings under different reinforced layers can be fitted by the Duncan–Zhang model, which indicates that the pseudo-cohesion of shear strength index increases linearly whereas the friction angle remains primarily unchanged with the increase in reinforced layers. In addition, we observed that, although the strength of the reinforced tailings increases substantially, the reinforcement effect is more significant at a low confining pressure than at a high confining pressure. On the contrary, the triaxial specimen strength decreases with the increase in the number of reinforced layers. Our findings can provide valuable input toward the design and application of reinforced engineering.

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“…Researchers mainly study the properties of the composite through direct shear and pull-out tests, but triaxial compression tests are also an effective means to study the properties of the composite. For example, Koerner (2000) performed a triaxial test and analyzed the influence of confining pressure, the influence law of the soil, and the complex shear strength index; Khedkar and Mandal (2009) compared the three kinds of pure sand under confining pressure and single complex and double complex stress-strain curves; Khaniki and Daliri (2013) analyzed the influence of confining pressure on the shear strength index of plain soil and composite through the triaxial test of composite; Chen et al (2014) conducted consolidation drainage and consolidation undrained tests, respectively, and analyzed the shear complex microstructure in the process of change; and Nouri et al (2016) studied the triaxial monotonous mechanical properties of the composite drainage conditions.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive analysis of the stability of tailings-geotextile composite—Iron Mine Tailings Dam in Gushan, Anhui, China

Zhou

Ji²,

et al. 2022

Front. Earth Sci.

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The application of tailings-geotextile composites can effectively reduce tailings dam safety accidents. In this paper, the tailings dam of the Gushan Iron Mine is the research background. The construction of tailings-geotextile composites was briefly studied. Based on the existing experimental data, the permeability and physical properties of the composite material were analyzed, and the model of the composite material was generalized. The seepage characteristics of the composite were analyzed by using the numerical simulation method of the seepage field. Finally, the overall stability of the composite during the construction and storage phases was investigated. The conclusions are as follows: 1) In the early stage of stacking, the permeability coefficient of the composite body increases with the increase in filling tension; in the later stage, under the action of excess pore pressure, the composite body still exhibits strong permeability; 2) In the early stage of stacking, the height of the composite body is low, and the relative position of the saturated zone is relatively high; as the composite continues to rise or the stacking time increases, the lower part of the composite is gradually consolidated, and the position of the saturated zone is gradually raised; when the stacking is stopped, the saturated zone gradually decreases until it is close to the original position; 3) With the increase in the stacking height of the composite, the safety factor decreases rapidly; when the stacking height is 22.0 m, it decreases to the minimum; with time, the stability of the composite will gradually increase. This study helps people understand tailings-geotextile composites, and it has significant reference value for practical engineering.

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Analytical and experimental approaches to obtain the ultimate strength of reinforced earth elements

Cited by 4 publications

References 2 publications

The effect of maximum diameter of geogrid-reinforced sandy soil particles on shear strength parameters

The effect of maximum diameter of geogrid-reinforced sandy soil particles on shear strength parameters

Triaxial Testing of Geosynthetics Reinforced Tailings with Different Reinforced Layers

Comprehensive analysis of the stability of tailings-geotextile composite—Iron Mine Tailings Dam in Gushan, Anhui, China

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