Behaviour of square footing on sand reinforced with coir geocell

Lal, Dharmesh; Sankar, N.; Chandrakaran, S.

doi:10.1007/s12517-017-3131-9

Cited by 22 publications

(12 citation statements)

References 24 publications

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“…Furthermore, the increase in the height of the geocells enables the geocell-reinforced soil to act as a composite body, providing anchorage, as shown in Figure 2. It also increases the bending and shear rigidity of geocellreinforced structures due to an increase in the moment of inertia, which redistributes the overlying load to a larger area, resulting in enhanced load-carrying capacity and reduced settlements in the underlying soil [17,[22][23][24][25]. The increased rigidity offered by the geocellreinforced soil composite from the increased height of the geocells provides adequate confinement to the infill soil, which prevents lateral displacements [23,24,26,27].…”

Section: Height Of the Geocells (H)mentioning

confidence: 99%

Evolution of Geocells as Sustainable Support to Transportation Infrastructure

Krishna,

Latha

2023

Sustainability

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Geocells, which are polymeric interconnected cells filled with soil, provide excellent support to loads through all-round confinement and a beam effect; hence, they are extensively used in various geotechnical applications such as embankments, foundations, pavements, slopes, railways, and reinforced earth (RE) walls. Although the applications of geocells are studied extensively, their geometric and parametric evolution as a stable support to heavy loads receive less attention. The current versatile configuration of geocells has geometrically evolved after accounting for all the factors that give them optimum reinforcement efficiency. This paper presents a state-of-the-art review of the geometric evolution of geocells in the context of transportation geotechnical engineering. Effects of shape, size, stiffness, and surface roughness of geocells, and properties of infill and native soils on the performance of geocells are compiled from the literature to get important design insights. The application of geocells in pavements is discussed, concluding that geocells improve the cyclic load carrying capacity and resilient characteristics of pavement, reduce rut depths, and increase traffic benefit ratio (TBR). Hence, geocells can be a sustainable alternative to natural materials in transportation infrastructure, with the added advantages of reduced carbon footprint and maintenance costs.

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Section: Height Of the Geocells (H)mentioning

confidence: 99%

Evolution of Geocells as Sustainable Support to Transportation Infrastructure

Krishna,

Latha

2023

Sustainability

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“…The dimensions and strength characteristics of materials need to be appropriately scaled down to match the test conditions so that the entire system can replicate the field conditions [18]. In the absence of commercial geocells in the required small dimensions, the model geocells were hand-stitched in the desired geometry by cutting the geotextile into strips of requisite length and width and stitching the strips at the joints in the transverse direction using coir yarns to obtain a honeycomb layout [15].…”

Section: Coir Encasement and Geocellmentioning

confidence: 99%

“…Experimental investigations on the comparative behavior of planar and cellular forms of geosynthetic reinforcement indicate that geocells are superior in improving the strength of foundation beds [7,8]. In recent years, geocells' scope has risen, with several researchers reporting the beneficial effect of these 3D confining structures in various construction applications like pavements, embankments, foundations, and slope protection [9][10][11][12][13][14][15][16]. The behavior of geocell-reinforced beds is reportedly affected by multiple factors, including material properties, geocell stiffness, cell dimensions, and scale effect [12,17,18].…”

Section: Introductionmentioning

confidence: 99%

Model Tests on Coir Geotextile-Encased Stone Columns with Tyre Crumb-Infilled Basal Coir Geocell

Menon

Konnur

Bhasi

2021

Int. J. of Geosynth. and Ground Eng.

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An encased stone column with a geocell mattress can serve as a flexible pile raft system, helping in the uniform transfer of embankment load to the underlying foundation soil, improving their behavior. The efficiency of encasement and geocell depends on various factors, among which the material stiffness is an important one. The present study addresses the global concerns over excessive use of synthetic materials in soil by replacing the conventional synthetic forms of reinforcement (geotextile/geocell) with locally available coir fibers. Furthermore, to enhance the composite system's sustainability, the potential replacement of the conventional geocell infill materials like stone and aggregates by waste rubber tyre crumbs is also investigated. Laboratory scale model tests were conducted on a single encased stone column installed in a soft clay bed with coir geocell mattresses as basal reinforcement, adopting the unit cell concept. The static vertical load was applied at a constant strain rate of 0.06 mm/min to simulate the field conditions, and the load settlement responses were recorded up to a settlement of 12 mm. The results show that the composite system significantly improved the load settlement response of soft soils by developing more uniform load settlement profiles. It was also observed that the partial replacement of crumb rubber up to 10% as geocell infill material improved the interface frictional behavior and the load-carrying capacity of the foundation, thereby forming a sustainable solution for the environmental hazard due to the accumulation of used rubber tyres.

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“…Load-settlement behaviour and BC enhancement of the footings in low-bearing soils by the geocell reinforcement (GR) is cited in the past and more recent investigations (e.g. Dash et al 2003a, b;Zhou and Wen 2008;Pokharel et al 2010;Moghaddas Tafreshi et al 2014, 2015Lal et al 2017;Hegde 2017;Shadmand et al 2018;Tavakoli Mehrjardi et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Behaviour of circular footings confined by rigid base and geocell reinforcement

Dehkordi

Karim

2020

Arab J Geosci

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Soil in nature may exist in a stratified state. A possible condition is the case of a rigid layer underlying a weak sand stratum. In this instance, the bearing capacity of a shallow footing is affected by the lower rigid boundary. The treatment of thin soil layer by geocell reinforcement to raise the load carrying capacity of single shallow footing has been limited in the literature. Accordingly, rigid base and geocell reinforcement are investigated separately and in combination to study their influence on the behaviour and BC of shallow circular footings in dry sand bed. To capture that effect, different size rigid circular footings were tested on a bed in fully instrumented small-and large-scale laboratory installations. The ratio of sand layer thickness to footing diameter was changed considering optimum dimension and embedment depth for geocell mattress. The extensive laboratory part involved monitoring subgrade deformations, soil-geocell stresses and strains revealing the appropriate models for failure mechanisms in the presence of such confinements. Large increase in bearing capacity up to 225% and significant settlement reduction up to 66% are measured for the combined case. Base confinement less than three times the footing diameter in combination with the geocell mattress resulted in favourable higher design performance factors. New equations are proposed to estimate these factors for design and to extend classical formulations for footings strengthened by combined geocell-base confinement. A design performance factor is dependent on footing diameter, sand relative density and the ratio of layer thickness to footing diameter. As this ratio increases, this design factor decreases reaching a constant value at the critical depth.

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Behaviour of square footing on sand reinforced with coir geocell

Cited by 22 publications

References 24 publications

Evolution of Geocells as Sustainable Support to Transportation Infrastructure

Evolution of Geocells as Sustainable Support to Transportation Infrastructure

Model Tests on Coir Geotextile-Encased Stone Columns with Tyre Crumb-Infilled Basal Coir Geocell

Behaviour of circular footings confined by rigid base and geocell reinforcement

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