Numerical analysis of geocell-reinforced retaining wall failure modes

Song, Fei; Liu, Huitao; Ma, Lei; Hu, Hongbing

doi:10.1016/j.geotexmem.2018.01.004

Cited by 50 publications

(14 citation statements)

References 66 publications

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“…Based on the physical parameters measured through laboratory testing and the feasible range of parameter values in the JTG D30-2004 Specifications of Design of Highway Subgrades [22], the numerical parameters can be determined using equation (15), which are summarized in Table 3. Geocell was modeled as a 2-node linear truss element [35,36]. A surface-to-surface contact is employed to define the interfaces.…”

Section: Finite Element Simulationmentioning

confidence: 99%

Ecological Retaining Wall for High‐Steep Slopes: A Case Study in the Ji‐Lai Expressway, Eastern China

Jiang

Zuo

et al. 2020

Advances in Civil Engineering

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Research on the retaining structures for high-steep slopes is extremely significant because of its real-world applications and far-reaching implications. A flexible geocell-reinforced ecological retaining wall as a high-steep slope protection scheme was developed and applied to the slope protection project of the Ji-Lai Expressway by analyzing the reinforcement mechanism of the geocell used. The lateral displacement and Earth pressure distribution on the flexible ecological retaining wall applied to the high-steep slope were studied using finite element numerical simulations and verified using field experiments. Results reveal that the wall maximum horizontal displacement is 2/3 H away from the wall toe because of the replacement of the upper part of soil. There is an obvious bucking effect on the active Earth pressure around the stiffened site, and the flexible deformation of the retaining wall helped effectively release some of the Earth pressure. Consequently, the measured value is lower than the theoretical value. Through this case study, it is demonstrated that the flexible ecological retaining wall as a slope protection technology can be successfully applied to steep slopes with a height of more than 15 m. Moreover, it brings significant advantages for protecting the ecological environment and improving the highway landscape.

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Section: Finite Element Simulationmentioning

confidence: 99%

Ecological Retaining Wall for High‐Steep Slopes: A Case Study in the Ji‐Lai Expressway, Eastern China

Jiang

Zuo

et al. 2020

Advances in Civil Engineering

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“…The cell walls, junctions and the infills integrate into a thick engineered mattress of enhanced rigidity which as a system increases resilience of ground. The advantages have promoted deployment of geocell in a wide range of applications, e.g., foundations and embankments [1][2][3], earth retentions [4], utility pipeline overlying [5], railways sub-tracks [6,7], plate anchors [8], river banks [9] and vibration isolation beds [10].…”

Section: Introductionmentioning

confidence: 99%

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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Numerical analysis of geocell-reinforced retaining wall failure modes

Cited by 50 publications

References 66 publications

Ecological Retaining Wall for High‐Steep Slopes: A Case Study in the Ji‐Lai Expressway, Eastern China

Ecological Retaining Wall for High‐Steep Slopes: A Case Study in the Ji‐Lai Expressway, Eastern China

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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