Confinement effect of geocells on sand samples under triaxial compression

Chen, Rong‐Her; Huang, Yi‐Chuan; Huang, Feng-Chi

doi:10.1016/j.geotexmem.2013.01.004

Cited by 85 publications

(21 citation statements)

References 15 publications

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“…The mechanical behaviours of soils reinforced with various types of inclusions such as geosynthetic sheets, steel armatures, geogrids, gabion cells and geocells have attracted attention from many researchers in the recent past (Chen et al, 2013;Moghaddas Tafreshi and Dawson, 2012;Parsons et al, 2009;Saran, 2010;Yang et al, 2012). In particular, the effect of dynamic loads on such structures is a major issue as far as hazard mitigation is concerned.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of the response of geocell-reinforced walls to horizontal localized impact

Soudé¹,

Chevalier²,

Grédiac³

et al. 2013

Geotextiles and Geomembranes

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International audienceThe aim of this work is to study the effect of a localized impact on a wall made of soil reinforced with geocells. First, two structures were tested with an impacting remote-controlled car. Such experiments, carried out on 1/10th-scale model structures for practical reasons, are designed to mimic the mechanical response of an alveolar geocell reinforcement system. Two types of constitutive materials were considered for the geocells with very different mechanical properties. The test structures were dismantled after the tests to analyse the influence of the impact on the cell layers, especially within their bulk. Examining the video of the tests captured with two high-speed cameras also helped understanding the phenomena that occurred during impact. These experiments were completed by numerical simulations whose objective was to understand more clearly the causes of the phenomena observed either within the dismantled structures or in the videos

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of the response of geocell-reinforced walls to horizontal localized impact

Soudé¹,

Chevalier²,

Grédiac³

et al. 2013

Geotextiles and Geomembranes

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“…Geocell increases the bending, tensile and shear strengths of soil and, due to its height, functions as a beam providing moment of inertia and consequently bending strength. Although bending stiffness is low with respect to thickness, it can diminish deformations of layers and cause reduction in the settlement of soil-structure system [7].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of Geocell Changes on Slope Stability in Unsaturated Soil

Mehdipour

Hashemolhosseini

Nadi

et al. 2020

Teh. glas. (Online)

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The purpose of this research is to investigate the performance and efficiency of reinforced slope in the stability of geocell layers in unsaturated soil conditions. Slope reinforced with geocell acts like a beam in the soil due to the geocell having a height (three-dimensional). Due to its flexural properties, it has moment of inertia as well as bending strength, which reduces the displacement and increases the safety factor of the slope. Taking into consideration unsaturated conditions of soil contributes a lot to making results close to reality. One of the well-known models among elastoplastic models for modeling unsaturated soils is Barcelona Basic Model, which has been added to the FLAC2D software by codification. Changes in thickness, length and number of geocell layers are remarkably effective on slope stability. The results show that the geocell's reinforcing efficiency depends on the number of layers and depth of its placement. As the depth of the geocell's first layer increases, the lateral and vertical side elevation of the upper part of the slope increases with respect to the elevation. Load capacity increases with increasing geocell length. By increasing the length of the geocell layer, the joint strength, the mobilized tensile strength, and the bending moment are increased. At u/H = 0.2, an increase in the bending momentum of about 20% occurs with increasing geocell thickness. In u/H = 1, the increase in bending momentum is 10.4%. In addition, by increasing the thickness of the geocell, the Value of moment of the inertia increases and, as a result, the amount of geocell reinforcement bending moment increases.

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“…[2][3][4][5]). The results of largescale triaxial tests on samples of geocell-reinforced sand have shown that shear strength of geocell encased sand increases since an apparent cohesion is induced in the sand due to con nement while the internal friction of the in ll sand remains constant [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of reinforcement geometry on the performance of a reduced-scale strip footing model supported on geocell reinforced sand

Kargar

Hosseini

2017

Scientia Iranica

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Abstract. Geocell is an e ective type of geosynthetics for improving the performance of reinforced soil foundations due to provision of lateral con nement for the in ll soil. In this research, in order to study the bearing pressure-settlement response of geocellreinforced sand, a reduced-scale physical model is developed and geocells with various geometrical dimensions (height, pocket size, and width) produced from woven geotextile are used to reinforce sand bed. Strip footing model is then loaded monotonically to ultimate failure level, and the in uence of geocell geometrical properties on the improvement in bearing capacity and settlement of footing is described. The results show that by increasing height and decreasing pocket size of geocell, the bene cial e ect of geocell reinforcement increases substantially. For the highest geocell used in the tests at settlement level of 6%, improvement in bearing capacity and percentage reduction in footing settlement are obtained as 2.1 and 48%, respectively. The optimum width of geocell is determined ve times the foundation width beyond which the improvement e ect is negligible. It is also concluded that substituting a single layer of geocell reinforcement with 2 half-height and 4 quarter-height geocell layers results in 10% and 22% decrease in the ultimate bearing capacity, respectively.

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Confinement effect of geocells on sand samples under triaxial compression

Cited by 85 publications

References 15 publications

Experimental and numerical investigation of the response of geocell-reinforced walls to horizontal localized impact

Experimental and numerical investigation of the response of geocell-reinforced walls to horizontal localized impact

Investigating the Effect of Geocell Changes on Slope Stability in Unsaturated Soil

Effect of reinforcement geometry on the performance of a reduced-scale strip footing model supported on geocell reinforced sand

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