Experimental studies of the behaviour of geosynthetic wrap around anchorage

Abstract

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.

Geosynthetics anchorage with wrap around: experimental and numerical studies

“…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.…”

“…Two French research laboratories (Irstea and INSA Lyon) performed tests jointly with two anchorage benches on the same reinforced non-woven needle-punched geotextile and with the same geometry of anchorage in cohesive and noncohesive soils. Laboratory tests performed with INSA anchorage apparatus (Lajevardi et al 2014(Lajevardi et al , 2015 are simulated with a two-dimensional DEM.…”