Three-Dimensional Discrete-Element Modeling of Geocell-Reinforced Ballast Considering Breakage

Liu, Yang; Deng, An; Jaksa, M.

doi:10.1061/(asce)gm.1943-5622.0001552

Cited by 17 publications

(4 citation statements)

References 52 publications

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“…Despite its considerable potential, the utilization of 3D cellular inclusions in railway tracks remains limited because of a lack of available methods for evaluating the extent of improvement offered by these inclusions. Consequently, several researchers have explored different techniques, such as FE and discrete element (DE) analyses, to evaluate the effectiveness of using cellular inclusions in enhancing the long-term stability of railway tracks [69][70][71][72][73]. However, the DE and FE methods require substantial computational This section examined the sustainable application of a geogrid in a GRPS railway embankment, highlighting its influence on the load transfer mechanism within the embankment fill.…”

Section: Generalmentioning

confidence: 99%

Experimental and Computational Analyses of Sustainable Approaches in Railways

Farooq,

Meena,

Punetha

et al. 2024

Infrastructures

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Railway transportation is widely recognized as an environment-friendly and sustainable means for conveying freight and passengers over long distances. This article investigates the effectiveness of utilizing scrap tire rubber granules and geosynthetics to enhance track performance in response to the growing demands for railway transport and the consequent escalation of train-induced loading. A multi-faceted methodology, incorporating experimental, numerical, and analytical techniques, is employed to examine the efficacy of these sustainable approaches. Results from three-dimensional (3D) finite element (FE) analyses conducted on slab tracks for high-speed railways reveal that the addition of a resilient layer, comprising scrap tire rubber granules, reduces vertical stress within the track substructure. Laboratory investigations on an innovative composite material consisting of soil, scrap rubber granules, and polyurethane demonstrate its potential to enhance track performance. Findings from two-dimensional (2D) FE analyses conducted on pile-supported railway embankments highlight an enhanced transfer of load to the pile head following the installation of a geogrid layer at the embankment base. Finally, the results from the analytical approach indicate a reduction in track settlement and a decrease in the track geometry degradation rate on reinforcing the ballast layer with 3D cellular geoinclusion. The novelty of this study lies in the comprehensive assessment of the innovative composite material under drained and cyclic loading conditions, the investigation of the influence of train loading on geosynthetic tension and the load transfer mechanism in railway embankments, and the development of an innovative computational methodology capable of assessing the effectiveness of 3D cellular inclusions in improving the ballasted railway track performance. The findings from this article underscore the effectiveness of these sustainable approaches in mitigating the challenges posed by increased loads on railway tracks, providing valuable insights for the ongoing efforts to optimize railway transportation infrastructure.

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Section: Generalmentioning

confidence: 99%

Experimental and Computational Analyses of Sustainable Approaches in Railways

Farooq,

Meena,

Punetha

et al. 2024

Infrastructures

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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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“…Mehdipour's research [17] indicated that geocells can disperse stress during the process of transmission by absorbing the load, which in turn reduces both permanent transverse and longitudinal deformation. Hegde, A. et al [18] and Liu, Y. et al [19] proposed a method for building three-dimensional (3D) geocell models. Dash, S.K.…”

Section: Introductionmentioning

confidence: 99%

Modeling Riverbank Slope Reinforcement Using Anti-Slide Piles with Geocells

Liu

Zhou

et al. 2021

JMSE

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Geocells are increasingly used in engineering applications, but the design of riverbank slope reinforcements that use only geocells limits reinforcement performance. Moreover, the design and use of anti-slide piles with geocells are mainly based on experiences that are unsupported by theoretical models. In this paper, by combining the confinement effect and vertical action mechanism of geocells, the horizontal friction mechanism of the geocell layer and the vertical support mechanism of piles, a theoretical model of riverbank slope reinforced by anti-slide piles with geocells was constructed. In addition, to describe the mechanical behavior of a riverbank slope reinforced by anti-slide piles with geocells, the slip-resisting mechanism of the anti-slide pile with interaction between geocells and their internal filler is considered in the model. Furthermore, to investigate the influence of changes in water level on riverbank slope stability, the developed model takes into account settlement, lateral displacement, pile bending moment and pile axial force. The model predications were validated by the field measurement data. The results from a series of parametric studies show that the use of anti-slide pile and geocells can effectively reduce the settlement and the lateral displacement of a riverbank slope. The developed model could contribute to an optimal design of anti-slide pile with geocells for enhancing the stability of a riverbank slope.

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Three-Dimensional Discrete-Element Modeling of Geocell-Reinforced Ballast Considering Breakage

Cited by 17 publications

References 52 publications

Experimental and Computational Analyses of Sustainable Approaches in Railways

Experimental and Computational Analyses of Sustainable Approaches in Railways

Limit State and Creep Behaviour of High-Density Polyethylene Geocell

Modeling Riverbank Slope Reinforcement Using Anti-Slide Piles with Geocells

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