Field monitoring and analyses of the response of a block-faced geogrid wall using fine-grained tropical soils

Riccio, Mario; Ehrlich, M.; Dias, Daniel

doi:10.1016/j.geotexmem.2014.01.006

Cited by 74 publications

(27 citation statements)

References 24 publications

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“…matric suction where air starts to enter the largest pores in the soil) generally increase with the plasticity of the soil (Fredlund and Xing 1994). Matric suction contributes to the stability of GRSS increasing the soil stiffness and improving the interface shear strength behaviour (Khoury et al 2011;Portelinha et al 2012;Hatami et al 2013;Riccio et al 2014;Esmaili et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Direct shear behaviour of residual soil–geosynthetic interfaces – influence of soil moisture content, soil density and geosynthetic type

Ferreira

Vieira

Lopes

2015

Geosynthetics International

127

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Soil-geosynthetic interface shear strength is an essential parameter for the design and stability analysis of geosynthetic-reinforced soil structures. Economic and environmental reasons have led to increasing use of locally available residual soils with a significant percentage of fines and lower draining capacity, when compared with the traditional good-quality backfill materials. This paper describes an extensive laboratory study carried out using a large-scale direct shear test device, in which the influence of soil moisture content, soil density and geosynthetic type on the direct shear behaviour of the soil-geosynthetic interface was evaluated. The study involved a locally available granite residual soil and four geosynthetics: two geogrids (one uniaxial and the other biaxial), one geocomposite reinforcement (high-strength geotextile) and one geotextile. Test results have revealed that the increase in soil moisture content can measurably reduce the soil-geosynthetic interface shear strength. Regardless of soil moisture content, soil density proved to have a remarkable influence on interface shear strength, particularly when geogrids were used. Among the different geosynthetics tested, the biaxial geogrid was found to be the most effective reinforcement for this particular type of soil, concerning the direct shear mechanism. For soil-geogrid interfaces, the coefficients of interaction ranged from 0.71 to 0.99. For soil-geotextile interfaces, the coefficients of interaction varied from 0.54 to 0.85.

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Section: Introductionmentioning

confidence: 99%

Direct shear behaviour of residual soil–geosynthetic interfaces – influence of soil moisture content, soil density and geosynthetic type

Ferreira

Vieira

Lopes

2015

Geosynthetics International

127

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“…In current deign recommendations, a cohesionless soil is used for the backfill. Nevertheless, for practical or/and economic reasons related to the availability of granular material, cohesive soils are used as backfill for reinforced earth retaining walls in many areas across the world and show good performances [2]. The use of a cohesionless soils leads to a possible crack formation in the backfill that reduce the structure stability, since their tensile strength is very limited [3], hence the importance of consideration of the crack-formation as part of the failure mechanism.…”

Section: Introductionmentioning

confidence: 99%

Seismic internal stability assessment of geosynthetic reinforced earth retaining wall in cohesive soil using limit analysis

et al. 2019

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Assessment of internal seismic stability of geosynthetic reinforced cohesive soil retaining walls with likelihood for developing cracks in the failure mechanism is typically done with the limit equilibrium method. However, in this paper, the kinematic theorem of limit analysis combined with the discretization method are used to implement the crack formation in the collapse mechanism in the internal seismic assessment of geosynthetic reinforced soil retaining walls within the framework of the pseudo-static approach. The presence of the crack leads to an increase of the required reinforcement strength that prevent the failure of the structure.

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“…There are some methods to evaluate the mobilized load in the reinforcements, such as [1][2][3][4][5]. Through case studies, field instrumentation, physical and numerical modeling [6][7][8][9][10][11] have been demonstrated that among these methods the more suitable are the ones proposed in [4,5]. These methods explicitly consider soil and reinforcement properties, the effect of compaction operation, and the relative stiffness between soil and reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Reinforced Soil Wall Built with Fabrics

Riccio¹,

Ehrlich²

2019

Engineered Fabrics

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This chapter presents an example of use of fabrics in geotechnical engineering construction. Some aspects related to design, construction, and the performance of a 4.2-m-high-reinforced soil wall, located in Brazil, is presented. In this wall, geogrid (fabric reinforcement) was used as reinforcement, and the backfill was a fine-grained residual tropical soil. The wall was monitored during its construction (2 months); load in the reinforcements, vertical and horizontal displacements of the reinforced soil mass, and efforts on block-face were measured. The monitoring of the wall was done by means of load cells for the reinforcements and block-face, and also includes settlement plates, total pressure cells, inclinometers, and topographical marks. The results provided by the instruments showed good performance of the wall. Measurements and calculated tension in the reinforcements were compared, and good prediction capability of the used analytical method was demonstrated. The measured tensile load in the reinforcements was lower than the admissible load of the geogrids used in the wall. Measurements also indicate that the block-face was able to support part of the load that would be carried by the reinforcements.

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Field monitoring and analyses of the response of a block-faced geogrid wall using fine-grained tropical soils

Cited by 74 publications

References 24 publications

Direct shear behaviour of residual soil–geosynthetic interfaces – influence of soil moisture content, soil density and geosynthetic type

Direct shear behaviour of residual soil–geosynthetic interfaces – influence of soil moisture content, soil density and geosynthetic type

Seismic internal stability assessment of geosynthetic reinforced earth retaining wall in cohesive soil using limit analysis

Behavior of Reinforced Soil Wall Built with Fabrics

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