Experimental and numerical studies of the performance of the new reinforcement system under pull-out conditions

Mosallanezhad, Mansour; Taghavi, S.H. Sadat; Hataf, Nader; Alfaro, Marolo C.

doi:10.1016/j.geotexmem.2015.07.006

Cited by 66 publications

(8 citation statements)

References 18 publications

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“…It has been a handy tool used to predict the behavior of any MSE walls. Some similar studies conducted numerical analyses whose results are in good agreement with the actual or site investigation results, perhaps with few reasonable and tolerable differences [7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Numerical Modelingmentioning

confidence: 84%

Numerical Analysis of the Deformation Behavior of Geogrid-Reinforced MSE Wall Having FHR and SPT Wall Facing

Won¹,

Langcuyan²,

Lim³

et al. 2022

cea

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The mechanically stabilized earth (MSE) wall has been widely used globally for several decades now. The study on MSE wall is continuously growing as well as various innovations on its designs and techniques. The natural complexity of soil behavior makes the study on MSE wall system challenging for researchers. One of the factors that affect the deformation behavior of MSE wall structure is the wall facing system. Hence, this study is undertaken to investigate the deformation behavior of geogrid-reinforced MSE wall, having full height rigid (FHR) and segmental panel-type (SPT) wall facing, using finite element method (FEM) in Plaxis 2D program and small-scale experimental study. Both numerical and experimental models are using discrete geogrids reinforcement with three different reinforcement length ratios of 1H, 0.7H and 0.5H (where H is the wall height). The results from the series of numerical analysis and experimental tests showed that the vertical displacement on top of the MSE wall and the horizontal displacements of the FHR facing were smaller than those of the SPT wall facing, regardless of the reinforcement length. In addition, the reinforcement length has minimal effect on settlement for MSE wall with FHR facing but is more visible for MSE wall with SPT wall facing. The magnitude of the reinforcement effect may not be great in this study because the MSE wall models are only 0.60m high. But it is expected that the higher wall height might induce greater reinforcement length effect.

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Section: Numerical Modelingmentioning

confidence: 84%

Numerical Analysis of the Deformation Behavior of Geogrid-Reinforced MSE Wall Having FHR and SPT Wall Facing

Won¹,

Langcuyan²,

Lim³

et al. 2022

cea

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show abstract

“…There have been several studies in this field with the main objective of assessing the system (Mosallanezhad et al, 2008;Alamshahi and Hataf, 2009;Mosallanezhad, Sadat Taghavi et al, 2016). The main idea behind this new system was to add grid-anchors to the regular geogrids.…”

Section: Review Of Previous Workmentioning

confidence: 99%

Modeling of Uplift Resistance of Buried Pipeline by Geogrid and Grid-Anchor System

Maljaei

Katebi

Mahdi

2022

J. Pipeline Syst. Eng. Pract.

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This paper presents an experimental and numerical analysis of the uplift resistance of pipelines buried in reinforced soil. The behavior of the system is studied using a set of laboratory experiments. The pull-out forces of some reinforcing pipelines are the most important factors affecting the uplift resistance. Buried elements like pipelines that have high pressure fluids or are under the high temperature, need to be reinforced in order to increase their pull-out resistance. One of the efficient methods to reinforcement, is increasing the involvement between pipe and soil, by using of geogrids and anchors. Grid-anchor is a recent method for increasing the pull-out resistance of soil, and is the method used in this study. The Digital Image Correlation or Particle Image Velocimetry (DIC/PIV) method is used for measuring the displacement in the field of experimental mechanism. We also examined the influence of parameters affecting on the soil. An experimental study was performed to investigate the uplift resistance of the pipelines buried in sand reinforced with this system. The experimental results demonstrate that, for the pipes with a diameter of 50 mm, the grid-anchor system of reinforcement can increase the uplift capacity 2.4 times compared with the conventional geogrid and 4 times compared with non-reinforced sand. In the numerical modeling likewise, 23 experiments were back analyzed using the software FLAC-3D. It became known that experimental tests stand good comparison with the numerical results.

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“…Continuous mechanical methods, including the finite element method (FEM) and the finite difference method (FDM), have been used as numerical simulation tools to study the interaction between geogrids and soil [7][8][9][10][11][12]. However, the geometric structure of the geogrid is usually oversimplified, expressed as a truss structure in two-dimensional simulations and as a shell element in three-dimensional simulations.…”

Section: Introductionmentioning

confidence: 99%

DEM-FDM Coupled Numerical Study on the Reinforcement of Biaxial and Triaxial Geogrid Using Pullout Test

Jianjun

Chen

et al. 2021

Applied Sciences

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The key to modeling the interlocking of geogrid-reinforced ballast is considering both the continuous deformation characteristics of the geogrid and the discontinuity of the ballast particles. For this purpose, pullout tests using biaxial and triaxial geogrids were simulated using the coupled discrete element method (DEM) and finite difference method (FDM). In this coupled model, two real-shaped geogrid models with square and triangular apertures were established using the solid element in FLAC3D. Meanwhile, simplified shaped clumps were used to represent the ballast using PFC3D. The calibration test simulation showed that the accurately formed geogrid model can reproduce the deformation and strength characteristics of a geogrid. The pullout simulation results show that the DEM-FDM method can well predict the relationship between pullout force and displacement, which is more accurate than the DEM method. For ballast particles of 40 mm in size, both the experiment and simulation results showed that the triaxial geogrid of 75 mm is better than the 65-mm biaxial geogrid . In addition, the DEM-FDM method can study the interaction mechanism between the particles and the geogrid from a microscopic view, and also reveal the similar deformation behavior of the geogrid in the pullout process. Therefore, the DEM-FDM coupled method can not only investigate the interlocking mechanism between the ballast and particles but can also provide a great method for evaluating the performance of different types of geogrids.

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Experimental and numerical studies of the performance of the new reinforcement system under pull-out conditions

Cited by 66 publications

References 18 publications

Numerical Analysis of the Deformation Behavior of Geogrid-Reinforced MSE Wall Having FHR and SPT Wall Facing

Numerical Analysis of the Deformation Behavior of Geogrid-Reinforced MSE Wall Having FHR and SPT Wall Facing

Modeling of Uplift Resistance of Buried Pipeline by Geogrid and Grid-Anchor System

DEM-FDM Coupled Numerical Study on the Reinforcement of Biaxial and Triaxial Geogrid Using Pullout Test

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