Soil Geosynthetic Interaction: Design Parameters from Experimental and Theoretical Analysis

Abstract

The main objective of this paper is to discuss the experimental and theoretical approaches developed by different researchers in order to understand and to evaluate the soil geosynthetic interaction under different loading conditions. In the paper, the soil-geosynthetic interaction in pullout, direct shear, and inclined plane tests under both static and cyclic loading is analyzed based on the different theoretical and experimental results carried out by the authors and also available in literature. For each type of test, the factors affecting test results and soil-geosynthetic interface behavior, the theoretical model developed to predict the interface resistance and mobilized friction, and the relevance of the interface parameters obtained through the different tests in the design and performance of geosynthetic reinforced earth structures are discussed in detail.Keywords Geosynthetic . Interaction . Design . Laboratory tests . Modeling Transp. Infrastruct. Geotech. (2014) Grain size corresponding to 85 % in weight of passing soil (mm)Maximum grain size (mm) DrRelative density (%) f Cyclic tensile load frequency (Hz)Force required to hold back the upper box (kN)Lower support minimum length along the displacement direction (m) L R Reinforcement length in the anchorage zone (m) L U Upper box minimum length along the displacement direction (m) n t Number of geogrid bearing members n tbNumber of nodes in a transversal element P b1Maximum pullout bearing force of a single isolated transverse member (kN/m) P bn Maximum pullout bearing force (kN/m) P

Ön Yüzü Geomembran Kaplı Yüksek Bir KayaDolgu Barajın Deprem ve Geomembranda Yırtık Olması Durumunda Performansının Değerlendirilmesi

“…Defects and tear of geomembrane liners is possible [4]. In case of any tear, there are some available studies in the literature for calculating leakage rates of geomembrane liner systems [14,15,16,17,18,19,20]. Some emprical equations were developed in these studies to determine flow rates based upon laboratory tests for different dimensions of geomembrane defects such as from 2mm to 600 mm.…”

Experimental Investigation of Interface Behaviour of Different Types of Granular Soil/Geosynthetics

“…The interactions can be simplified as soil sliding in direct shear over the reinforcement and pullout of reinforcement from the soil [18]. The pullout mechanism has been investigated by full-scale and laboratory model tests and numerical analysis [19][20][21][22][23][24][25][26][27][28]. These studies mostly investigated geosynthetic/granular soil interactions.…”

Dry friction behaviour of a geosynthetic interface using inclined plane and shaking table tests

“…Interfaces may be weak discontinuities, and sliding may occur as a consequence of an improper assessment of the interface shear strength (Bacas et al, 2011;Blight, 2007;Eid, 2011;Moraci et al, 2014a;Palmeira, 2009). Consequently, a comprehensive study of geosynthetic interface shear strength is required.…”

“…To characterise the interface shear strength, the direct shear test is widely used (Delmas et al, 1979;Fox and Ross, 2011;Fox et al, 1998Fox et al, , 2006Gilbert et al, 1996;Reyes Ramirez and Gourc, 2003;Zornberg et al, 2005;Triplett and Fox, 2001) whereas the pullout test is used for the design of liners anchorage (Cazzuffi et al, 2011;Moraci and Cardile, 2012;Moraci and Recalcati, 2006;Moraci et al, 2014aMoraci et al, , 2014b.…”