Analysis of soil-welded steel mesh reinforcement interface interaction by pull-out tests

Lajevardi, Seyed Hamid; Dias, Daniel; Racinais, Jerome

doi:10.1016/j.geotexmem.2013.08.002

Cited by 32 publications

(7 citation statements)

References 41 publications

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“…After the last compacted layer, the extraction jack was started. Within the framework of these tests, the pull-out rate was fixed at 1 mm/min (Alfaro et al 1995;Abdelouhab et al 2010;Lajevardi et al 2013). The pull-out test was carried out and stopped as soon as the tension reached a plateau and all the displacement sensors monitored displacements.…”

Section: Pressure Sensormentioning

confidence: 99%

“…Several authors studied the behaviour of these anchorage systems numerically and experimentally. They showed that the pull-out test is the most suitable test to determine the soil/geosynthetic interface under low and high confinement stress and to support numerical studies in order to determine the behaviour and the anchorage capacity Gourc et al 2004;Chareyre and Villard 2005;De and Vellon 2005;Girard et al 2006;Briançon et al 2008;Su et al 2008;Khedkar and Mandal 2009;Palmeira 2009;Sieira et al 2009;Abdelouhab et al 2010;Lajevardi et al 2013Lajevardi et al , 2014Lajevardi et al , 2015. The soil-geosynthetic interaction can be complex because it is affected by structural, geometrical and mechanical characteristics of the geosynthetic, as well as by boundaries and loading conditions (Moraci and Recalcati 2006;Calvarano et al 2013;Cazzuffi et al 2014;Moraci et al 2014) and the mechanical properties of soil.…”

Section: Introductionmentioning

confidence: 99%

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Geosynthetics anchorage with wrap around: experimental and numerical studies

Lajevardi

Silvani

Dias

et al. 2015

Geosynthetics International

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Geosynthetics are used as reinforcing elements in a wide variety of structures: reinforced slopes and walls; embankments on soft soils; piled embankment; reinforcement in the base layers of railroad and road constructions; reinforced foundation mattresses; bridging of sinkholes or reinforced abutments. In some cases, these reinforced structures require anchorage areas. Designing the required dimensions of this anchorage remains problematic. This paper focuses on the simple run-out and wrap around anchorages. Laboratory tests, performed with these two anchorage benches, consisted of the pull-out of three geotextiles (uniaxial or biaxial with different stiffness) anchored following various geometries in different kinds of soil. In order to confirm and to complete the experimental studies presented in these anchorage systems, a specific two-dimensional discrete-element model has been used. The soil was described by discrete elements and the geosynthetic behaviour was taken into account by the use of thin finite elements. The interface behaviour between the soil particles and the geosynthetic elements was considered at each contact point by using a Coulomb contact law. The numerical model reproduced the experimental campaign and the anchorage mechanisms reasonably. The load transfer between the geosynthetic and soil was visualised by the force and displacements distribution along the geosynthetic sheet. The numerical procedure could also be used to define the conditions of stability for reinforced slopes or walls.

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Section: Pressure Sensormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geosynthetics anchorage with wrap around: experimental and numerical studies

Lajevardi

Silvani

Dias

et al. 2015

Geosynthetics International

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“…In many studies, an airbag was used to apply normal stresses to the reinforced soil mass (e.g., Palmeira 2004;Teixeira, Bueno, and Zornberg 2007;Nayeri and Fakharian 2009;Ezzein and Bathurst 2014;Weldu et al 2016). To protect the airbag from damage by aggregates, plates (e.g., steel plates or wooden plates) are placed under the airbag (e.g., Lajevardi, Dias, and Racinais 2013;Lawson et al 2013). In some cases, however, a hydraulic jack was used to apply the normal stress through a rigid plate (Abdelrahman, Ashmawy, and Abdelmoniem 2008;Abdi and Arjomand 2011).…”

Section: Introductionmentioning

confidence: 99%

Stress Distributions and Pullout Responses of Extensible and Inextensible Reinforcement in Soil Using Different Normal Loading Methods

Rahmaninezhad

Han

Kakrasul

et al. 2019

Geotechnical Testing Journal

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In design of reinforced soil structures, pullout capacity of reinforcement in an anchorage zone is an important parameter for stability analysis. This parameter is generally quantified by conducting laboratory or field pullout tests. In the laboratory pullout test, the reinforcement is embedded in the soil mass at a normal stress, which is commonly applied by a pressurized airbag or a hydraulic jack through a rigid plate, and then a horizontal tensile force is applied to the reinforcement. This article reports an experimental study conducted to evaluate the effect of the load application method using an airbag with and without stiff wooden plates on the vertical stress distribution and the pullout capacities and deformations of extensible (geogrid) and inextensible reinforcement (steel strip) in the soil in a large pullout box. This study monitored the distributions of the vertical earth pressures at the top and bottom of the soil mass in the pullout box, and at the level of reinforcement using earth pressure cells. The measured earth pressures show that the airbag with stiff plates resulted in a nonuniform pressure distribution, whereas the tests with an airbag directly on the soil had an approximately uniform pressure distribution. The nonuniform pressure distribution resulting from the airbag with stiff plates reduced the pullout resistance of the reinforcement as compared with that using the same airbag without stiff plates.

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“…A review of the literature concerning equipment and experiments has shown that the pull-out test is the most suitable test to determine the soil/geosynthetic interface under low and high confinement stress (Chang et al 1977;Palmeira and Milligan 1989;Ochiai et al 1992;Fannin and Raju 1993;Farrag et al 1993;Koerner 1994;Alfaro et al 1995;Raju 1995;Lopes and Ladeira 1996;Sugimoto et al 2001;Moraci et al 2004;Moraci and Recalcati 2006;Palmeira 2009;Abdelouhab et al 2010;Lajevardi et al 2013). They also permit the modelling of the anchorage systems for determining their anchorage capacity and to analyse the different mechanisms relating to such systems.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies of the behaviour of geosynthetic wrap around anchorage

Lajevardi

Dias

Briançon

2015

Geosynthetics International

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When determining the dimensions of a geosynthetic lining system, it is important to have knowledge of the behaviour of the anchorage of the geotextile sheets. In order to optimise the geometry of the structures in question and then reduce the area taken up by the anchorage, anchorage solutions using trenches of varying forms are sometimes used. This paper focuses on two types of anchors (simple run-out and wrap around). The first author has previously performed some pull-out tests using an anchorage bench under controlled conditions using three types of geosynthetics and two types of soil. The results obtained from that study showed that there is an optimum length for the upper part of the geosynthetic for the wrap around anchorage. A more detailed analysis which describes the behaviour of a geosynthetic for the wrap around anchorage, the influence of the geosynthetic and of the soil types is presented herein.

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Analysis of soil-welded steel mesh reinforcement interface interaction by pull-out tests

Cited by 32 publications

References 41 publications

Geosynthetics anchorage with wrap around: experimental and numerical studies

Geosynthetics anchorage with wrap around: experimental and numerical studies

Stress Distributions and Pullout Responses of Extensible and Inextensible Reinforcement in Soil Using Different Normal Loading Methods

Experimental studies of the behaviour of geosynthetic wrap around anchorage

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