Failure mechanisms of geocell walls and junctions

Liu, Yang; Deng, An

doi:10.1016/j.geotexmem.2018.11.003

Cited by 26 publications

(22 citation statements)

References 23 publications

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“…Kolathayar et al [37] through a series of model plate load tests provides an overview of bearing capacity and settlement characteristics of coir geocell and HDPE geocell reinforced sand bed and seashells sand bed. Liu et al [38] assessed the failure mechanism of geocells when subjected to tensile and shear loads by presenting the observed failure patterns and an evolution of implications of practical uses of geocells. Kuo and Chou [39] performed three dimensional FEM analysis and evaluated the effect of geo-textile interlayer on the performance of flexible pavement.…”

Section: Latha and Somwanshimentioning

confidence: 99%

Performance of Circular Footing on Expansive Soil Bed Reinforced with Geocells of Chevron Pattern

2019

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Results from laboratory model tests performed on circular footing are presented in this paper to understand the performance of geocell reinforced expansive soil. Naturally occurring expansive soil was used in this study as subsoil. Geocells of chevron pattern fabricated from geotextile made up of polypropylene were used to reinforce the soil bed. The parameters studied in this testing program were the placement depth of the geocell mattress, pocket size of geocell and the height of geocell mattress. Contrary to other researchers; the improvement in the performance of reinforced bed is evaluated at a settlement level equal to the failure settlement of unreinforced soil bed. The performance of reinforced bed is evaluated through two non-dimensional factors viz. bearing capacity improvement factor (If) and settlement reduction factor (PRS%). Test results indicated that with the introduction of geocell as reinforcement, a substantial improvement in bearing capacity and decrease in footing settlement can be achieved. Bearing capacity of reinforced bed increases by more than 200% and 81% reduction in footing settlement was achieved by using geocell mattress of optimal dimensions and placing it just below the footing base.

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Section: Latha and Somwanshimentioning

confidence: 99%

Performance of Circular Footing on Expansive Soil Bed Reinforced with Geocells of Chevron Pattern

2019

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“…HDPE, if deformed, becomes less stiff and overrelaxed which impairs working of the material with infills and hence serviceability of infrastructures where geocell is applied to [16]. The deformation was assessed by observing creep behaviour of geocell alone or infilled geocell [17,18]. These studies were focused on the global deformation of a geocell panel, which led to a lack of attention to local deformation at a particular section of geocell.…”

Section: Introductionmentioning

confidence: 99%

“…1). Each of the sections exhibits different levels of resistance to loading, and thus deformation [18]. In addition, past studies were focused on infilled geocell.…”

Section: Introductionmentioning

confidence: 99%

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Limit State and Creep Behaviour of High-Density Polyethylene Geocell

Deng

Huangfu

2021

Int. J. of Geosynth. and Ground Eng.

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A geocell, if fabricated from high-density polyethylene (HDPE), likely suffers from excessive deformation. The level of deformation is dependent on the load applied to the geocell and sections of the geocell the load acts on. Displacement-controlled tests were applied to sole sections of geocell, namely the cell wall, edge, and junctions. The tests consisted of wall elongating, edge tearing, and junction debonding. The tests were cell section-orientated, thus enabling identifying the most vulnerable part of the cellular system. The tests results comprised the tensile strength and creep behaviour of cell specimens. It was found that displacement rates affected the tensile strength and post-peak elongation at a level specific to the cell sections tested. The tensile strength of all sections of the geocell decreased with the displacement rate. The load magnitude affected the creep behaviour of the material and changed the time interval between the start of loading to a rupture. The creep behaviour was modelled numerically. Numerical simulations showed that stress concentration occurred at certain points on the geocell.

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“…as investigated in this paper, the load applied on the pavement surface may be handled such that the stress applied to EPS geofoam remains within a safe margin. 4 2017; Hegde, 2017;Dash and Choudhary, 2018;Moghaddas Tafreshi et al 2018;Ouria and Mahmoudi, 2018;Pokharel et al, 2018;Rahimi et al, 2018a;Satyal et al, 2018;Tavakoli Mehrjardi and Motarjemi, 2018;Venkateswarlu et al, 2018;Choudhary et al, 2019;Liu et al, 2019;Song et al, 2018;2019;Punetha et al, 2019, Neto, 2019Tavakoli Mehrjardi et al, 2019;Fazeli Dehkordi et al, 2019). The underlying bed used in these studies can be conveniently divided into "competent ground" and "soft ground".…”

Section: Introductionmentioning

confidence: 99%

Response of pavement foundations incorporating both geocells and expanded polystyrene (EPS) geofoam

Siabil

Tafreshi

Dawson

2020

Geotextiles and Geomembranes

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The suitability of geocell reinforcement in reducing rut depth, surface settlements and/or pavement cracks during service life of the pavements supported on expanded polystyrene (EPS) geofoam blocks is studied using a series of large-scale cyclic plate load tests plus a number of simplified numerical simulations. It was found that the improvement due to provision of geocell constantly increases as the load cycles increase. The rut depths at the pavement surface significantly decrease due to the increased lateral resistance provided by the geocell in the overlying soil layer, and this compensates the lower competency of the underlying EPS geofoam blocks. The efficiency of geocell reinforcement depends on the amplitude of applied pressure: increasing the amplitude of cyclic pressure increasingly exploits the benefits of the geocell reinforcement. During cyclic loading application, geocells can reduce settlement of the pavement surface by up to 41% compared to an unreinforced casewith even greater reduction as the load cycles increase. Employment of geocell reinforcement substantially decreases the rate of increase in the surface settlement during load repetitions. When very low density EPS geofoam (EPS 10) is used, even though accompanied with overlying reinforced soil of 600 mm thickness, the pavement is incapable of tolerating large cyclic pressures (e.g. 550 kPa). In comparison with the unreinforced case, the resilient modulus is increased by geocell reinforcement by 25%, 34% and 53% for overlying soil thicknesses of 600, 500 and 400 mm, respectively. The improvement due to geocell reinforcement was most pronounced when thinner soil layer was used. The verified three-dimensional numerical modelings assisted in further insight regarding the mechanisms involved. The improvement factors obtained in this study allow a designer to choose appropriate values for a geocell reinforced pavement foundation on EPS geofoam.

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Failure mechanisms of geocell walls and junctions

Cited by 26 publications

References 23 publications

Performance of Circular Footing on Expansive Soil Bed Reinforced with Geocells of Chevron Pattern

Performance of Circular Footing on Expansive Soil Bed Reinforced with Geocells of Chevron Pattern

Limit State and Creep Behaviour of High-Density Polyethylene Geocell

Response of pavement foundations incorporating both geocells and expanded polystyrene (EPS) geofoam

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