Centrifuge model study on geogrid reinforced soil walls with marginal backfills with and without chimney sand drain

Viswanadham, B. V. S.; Razeghi, Hamid Reza; Mamaghanian, Jaber; Manikumar, C.H.S.G.

doi:10.1016/j.geotexmem.2017.06.005

Cited by 42 publications

(5 citation statements)

References 40 publications

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“…Moreover, it will allow water to move through it and not through the soil and sub-base particles, reducing the soil expansion effect [ 77 , 78 ]. Besides, centrifuge models with geogrids used as reinforcements for soil walls with marginal backfill considering the impact of chimney sand drain [ 79 ] show that catastrophic failure can occur in soil walls reinforced with low stiffness geogrids due to the excess pore water pressure. In comparison, the soil wall reinforced with higher stiffness geogrids exhibited better performance.…”

Section: In Situ Behavior and Durability Of Geogrid Reinforcementmentioning

confidence: 99%

Polymer Geogrids: A Review of Material, Design and Structure Relationships

Al-Barqawi

Aqel

Wayne³

et al. 2021

Materials

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Geogrids are a class of geosynthetic materials made of polymer materials with widespread transportation, infrastructure, and structural applications. Geogrids are now routinely used in soil stabilization applications ranging from reinforcing walls to soil reinforcement below grade or embankments with increased potential for remote-sensing applications. Developments in manufacturing procedures have allowed new geogrid designs to be fabricated in various forms of uniaxial, biaxial, and triaxial configurations. The design flexibility allows deployments based on the load-carrying capacity desired, where biaxial geogrids may be incorporated when loads are applied in both the principal directions. On the other hand, uniaxial geogrids provide higher strength in one direction and are used for mechanically stabilized earth walls. More recently, triaxial geogrids that offer a more quasi-isotropic load capacity in multiple directions have been proposed for base course reinforcement. The variety of structures, polymers, and the geometry of the geogrid materials provide engineers and designers many options for new applications. Still, they also create complexity in terms of selection, characterization, and long-term durability. In this review, advances and current understanding of geogrid materials and their applications to date are presented. A critical analysis of the various geogrid systems, their physical and chemical characteristics are presented with an eye on how these properties impact the short- and long-term properties. The review investigates the approaches to mechanical behavior characterization and how computational methods have been more recently applied to advance our understanding of how these materials perform in the field. Finally, recent applications are presented for remote sensing sub-grade conditions and incorporation of geogrids in composite materials.

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Section: In Situ Behavior and Durability Of Geogrid Reinforcementmentioning

confidence: 99%

Polymer Geogrids: A Review of Material, Design and Structure Relationships

Al-Barqawi

Aqel

Wayne³

et al. 2021

Materials

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“…Moreover, a squeezing problem of panels may be seen under a combined effect of rainfall and earthquake within an undrained case (Ren et al, 2020). Viswanadham et al (2017) suggest a chimney drain application to minimize facing deformation, since it reduces the ground water table in the case of fine grained backfill usage.…”

Section: Introductionmentioning

confidence: 99%

Donatılı Zeminler için Alternatif Hafif Kompozit Panel Elemanları

EVİRGEN,

TUNABOYU,

BÜYÜK

et al. 2023

UUJFE

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Steel reinforced concrete facing members, which are used to fix geosynthetic reinforcements working against tensile forces inside soils and to resist active lateral earth pressures, have certain disadvantages, such as massiveness and corrosion. In addition, the aforementioned conventional panels are not economical since they frequently require maintenance and repair in terms of long-term stability. In this study, the utility of alternative composite panels is evaluated with the various arrangement and type of fiber reinforcements and a typical foam concrete. Panel tests and three-point bending tests are realized to determine the experimental behavior of steel, carbon fiber (CFRP) and glass fiber reinforced (GFRP) specimens, as well as unreinforced examples. Although CFRP wrapped specimens cannot reach expected levels, samples with GFRP present favorable performance as well as being cheaper. Specimens with mat GFRP enhance both strength and deformation capacities according to the results of axial and lateral deformations under diagonal loading condition. In addition, chopped GFRP applied foam concrete specimens have more strength in terms of bending test results, but CFRP reinforcements increase their displacement capacity.

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“…Creep is a potential problem for polymeric reinforcement such as geotextile; thus, long term performance of the structure needs to be evaluated. Several studies [12,13,14,15] were performed on retaining walls with geogrid reinforcement. Since geogrid does have drainage capability, additional measures were considered in the study.…”

Section: Introductionmentioning

confidence: 99%

“…Since geogrid does have drainage capability, additional measures were considered in the study. For example [12] used a chimney drain, [13] used an in-plane drainage inside the geogrids, while [14] utilized a capillary barrier system. Results showed that the geogrids reinforced wall performed well when combined with the drainage system to protect backfill soil from excess pore-water pressure resulting from rainfall infiltration as well as seepage from rising of the ground water table.…”

Section: Introductionmentioning

confidence: 99%

Contribution of suction on the stability of reinforced-soil retaining wall

Gofar¹,

Hanafiah²

2018

MATEC Web Conf.

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Existing design methods of a reinforced-soil retaining wall were established for walls with cohesionless soil backfill. However, local soil has been used widely in the construction of such a wall for economic reasons. Laboratory and numerical studies have pointed out the merit of using cohesive backfill in association with geosynthetic reinforcement. Since the compacted soil was in an unsaturated condition during the construction of the reinforced wall, the apparent cohesion derived from both soil mineralogy and suction could contribute to the stability of the wall. This paper considers methods to include the suction contribution to the existing design guidelines based on slope stability analysis, i.e. simplified method and simplified stiffness method. The analyses were carried out on a case study of geosynthetics reinforced soil retaining wall. Results show that the contribution of suction as part of cohesion existing in the cohesive backfill could be considered for the stability analysis of reinforced soil retaining walls using the available design guidelines.

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Centrifuge model study on geogrid reinforced soil walls with marginal backfills with and without chimney sand drain

Cited by 42 publications

References 40 publications

Polymer Geogrids: A Review of Material, Design and Structure Relationships

Polymer Geogrids: A Review of Material, Design and Structure Relationships

Donatılı Zeminler için Alternatif Hafif Kompozit Panel Elemanları

Contribution of suction on the stability of reinforced-soil retaining wall

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