Geosynthetics anchorage with wrap around: experimental and numerical studies

Abstract

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.

Finite Difference Modelling of Deformable Geosynthetics-Reinforced Barriers (DGRB) under the dynamic impact of debris avalanches

“…A control point P is taken into account in the core of the barrier order to track the displacements of the barrier (Figure 3a). The wrap-around technique is here considered due to the higher tensile stress obtainable compared to other reinforcement techniques [12].…”

Experimental studies of the behaviour of geosynthetic wrap around anchorage

“…The available models show that there has been no complete study on the geosynthetic behaviour with a wrap around anchorage. A specific study focused on the simple run-out and anchorage with wrap around (Lajevardi et al 2012a(Lajevardi et al , 2012b(Lajevardi et al , 2014Lajevardi 2013) highlighted the anchorage mechanisms and especially the effect of geometric parameters on anchorage efficiency for three types of geosynthetics and two types of soil.…”

مطالعه ی آزمایشگاهی و عددی اثر مهار برگشتی در ظرفیت باربری پی منفرد روی خاک مسلح

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