Soil-geotextile interaction: Evaluation of membrane support

Full-scale field tests on geosynthetic reinforced unpaved roads on soft subgrade

“…The reinforcement affects the fill somewhat proportionally to the tensile stiffness of the geosynthetic (Collin et al, 1996;Go¨bel and Lieberenz, 1997;Hirano et al, 1990;Miura et al, 1990), with the soil-geotextile interaction being a limiting factor (Espinoza, 1994;Palmeira and Cunha, 1993). In road and railroad applications, the mobilized forces can be limited due to insufficient anchoring.…”

“…The empirical approach (1) is valid for Np10000 and a maximum rut depth of 75 mm, or 40 mm with reference to the initial level of the pavement, respectively (Jenner et al, 2002). It is widely applied (Espinoza, 1994;Ingold, 1994;Koerner, 1997) and has proven satisfactory in practice (Jenner et al, 2002;Meyer and Elias, 1999;Som and Sahu, 1999).…”

Influence of geomembrane on the deformation behaviour of clay-based landfill covers

“…9). This implies the participation of tensioned membrane effect, which occurs at large deformations (Giroud et al, 1990;Ghosh andMadhav, 1994 andEspinoza, 1994). The tensioned membrane effect is mainly used in understanding the deformed behaviour of a geosynthetic layer in roads.…”

“…The computed strain variation along geomembrane layer was found to be consistent with the observed status of pre-drawn grids on exhumed geomembrane during post test investigations. Further by using: (i) computed strain distributions along the geomembrane layer and (ii) the curvature of the deformed geomembrane layer and (iii) stiffness of the GM, the vertical thrust exerted by the geomembrane layer in the cover system was calculated by using membrane theory (Espinoza, 1994). The thrust distribution from the centre of the clay barrier q g (x) is determined by using Eq.…”

Three-Dimensional Modeling of the Behavior of Geotextile Sheets as Membranes

“…Analytical or semi-empirical solutions exist for simple geometries and load cases [ 1,3,4,5,6,7,10 ] , but to our knowledge, few complete theories have been advan6ed to deal with all aspects of the problem.…”