Mechanical Properties of Fiber-Reinforced Soil under Triaxial Compression and Parameter Determination Based on the Duncan-Chang Model

Zhao, Yingying; Xue, Ling; Gong, Weigong; Li, Guoyu; Wang, Lina

doi:10.3390/app10249043

Cited by 24 publications

(8 citation statements)

References 33 publications

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“…With the increase of fiber content, the contact area between fibers and soil particles increases, and the reinforcement effect of fibers increases significantly. But excessive fibers will be entangled into agglomerates, which reduces the denseness of soil and leads to strength reduction instead [24] . Biopolymers can form high viscosity hydrogels when dissolved in water [11,25].…”

Section: Resultsmentioning

confidence: 99%

Study on the impact of a biopolymer-fiber combination on soil reinforcement

Gu¹,

Cai²,

Chen³

2022

AETR

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Due to environmental concerns, the search for eco-friendly and efficient soil reinforcement has become urgent in recent. In this paper, the low-carbon and environment-friendly materials biopolymer and fibers were used for soil reinforcement. Direct shear tests were carried out to determine the reinforcement effect, results show that the shear strength of soil increases first and then decreases with the increase of fiber content, it reaches to the peak value at the content of 0.5%. Biopolymer increases soil shear stregnth and 0.5% content presents most effective strengthening effect. When biopolymer and fibers are mixed into soil, it show better reinforced effect than the sum of individual efforts.

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Section: Resultsmentioning

confidence: 99%

Study on the impact of a biopolymer-fiber combination on soil reinforcement

Gu¹,

Cai²,

Chen³

2022

AETR

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“…Li Xiaojun et al conducted shear tests on diverse geomaterial-reinforced soils, including gravel, clayey, coarse-grained, and fine-grained variants. The results highlighted that geomaterial reinforcement significantly enhances soil strength and validated the Duncan-Chang model's utility in depicting the ontological relationships within reinforced soils [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 86%

Triaxial Test and Discrete Element Numerical Simulation of Geogrid-Reinforced Clay Soil

Wang,

Hu,

Liu

et al. 2024

Buildings

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Indoor triaxial tests on geogrid-reinforced clay elucidate the macroscopic changes in soil strength indices post-reinforcement, yet the underlying mechanisms of strength enhancement require further investigation. By conducting indoor triaxial tests and establishing a corresponding discrete element numerical model, we can delve into the fine-scale mechanisms of geogrid-reinforced soil. This includes analyzing changes in fine-scale parameters such as porosity, the coordination number, and contact stress between soil particles. The findings suggest that an increase in the number of geogrid reinforcement layers leads to a more pronounced improvement in peak strength and cohesion, albeit with minimal impact on the internal friction angle of the specimens. Furthermore, analysis of the triaxial test curves of reinforced soils indicates that the stress–strain relationship adheres to the Duncan–Chang model. Parameters derived from this model have been validated against experimental data, confirming their accuracy. The discrete element model was used to analyze the variations in fine-scale parameters such as porosity and coordination number. It revealed that reinforcement reduces the fluctuation amplitude of porosity and significantly increases the number of particle contacts, resulting in a denser soil structure. Further analysis of the change in contact stress between particles in the discrete element model revealed that the contact force between particles increased significantly after reinforcement and that the reinforcement played a role in restraining the soil particles and dispersing the reinforcement stress, which explains the increase in the strength of the mesh-reinforced clays from another perspective. This further elucidates the strength enhancement mechanism in geogrid-reinforced clay, offering a new perspective on the mechanical behavior and strength development of such materials.

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“…UV radiation, temperature, chemical and mechanical damage, and treatment are factors significantly affecting the degradation of plastic and geosynthetics [ 11 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ]. At the end of the pavement life, a polyester geosynthetic can be milled using powerful milling machines.…”

Section: Methodsmentioning

confidence: 99%

Recycled Polyester Geosynthetic Influence on Improvement of Road and Railway Subgrade Bearing Capacity— Laboratory Investigations

2021

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After years of using geosynthetics in civil engineering and infrastructure construction, it has recently become necessary to consider the possibility of recycling and reusing these materials. This paper presents the results of laboratory tests of the effect of recycled geogrid on the bearing capacity of soils using a CBR test. A polyester geosynthetic was selected for testing due to its high resistance to biodegradation and wide application. In a series of laboratory tests, two types of road and railway subgrade were used, mixed with geosynthetic cuttings in two different weight concentrations. The aim of the research was to demonstrate whether old demolition geosynthetics could be used to strengthen road and rail subgrade as recycled material. The influence of the geosynthetic cutting shape was also considered. The obtained results confirm the possibility of using recycled geogrid to improve the bearing capacity of the pavement subgrade, at least under these laboratory conditions. In the case of sand, the use of 2.0% additive causes that the poorly compacted soil obtains sufficient bearing capacity for the layer of road improved subgrade. As expected, the level of this improvement depends on the type of soil and the shape of geogrid cuttings.

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Mechanical Properties of Fiber-Reinforced Soil under Triaxial Compression and Parameter Determination Based on the Duncan-Chang Model

Cited by 24 publications

References 33 publications

Study on the impact of a biopolymer-fiber combination on soil reinforcement

Study on the impact of a biopolymer-fiber combination on soil reinforcement

Triaxial Test and Discrete Element Numerical Simulation of Geogrid-Reinforced Clay Soil

Recycled Polyester Geosynthetic Influence on Improvement of Road and Railway Subgrade Bearing Capacity— Laboratory Investigations

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