... centrifuge. A custom-developed simulator is employed to induce identical flood rates on the upstream side of models. Further, using (a) geocomposite (GC) and (b) sand-sandwiched geocomposite (SSGC) as internal chimney drain, the suitability of GC material for dissipation of pore-water pressure (PWP) is also...

...R. Showkat; G. L. Sivakumar Babu Embankment failures can be prevented by introducing geocomposites to act as drains. The effect of the geocomposite layer on the pore pressure distribution and surface displacements of an unsaturated embankment upon infiltration has been studied numerically using...

.... To date, shear test data on composite liners that contain more than two geosynthetics are limited. This paper presents an experimental study of the interface shear behaviour of a multilayer geosynthetic liner consisting of a drainage geocomposite (GC), a textured geomembrane (GMB), and a needle-punched...

...J. Mamaghanian; B. V. S. Viswanadham; H. R. Razeghi This paper investigates the effect of geocomposite layers (as an internal drainage system) and a chimney sand drain (as an external drainage system) on the performance of reinforced soil walls with panel facing and marginal backfill. Four models...

..., are of particular interest to the construction industry as a potential replacement for granular backfill materials. A numerical analysis of the unsaturated flow was conducted to assess the potential impact of each unsaturated flow parameter on the hydrological conditions in an MSE wall with a geocomposite...

... common material in use. However, the application of granular materials is not an easy task in some cases, owing to the high costs involved, and the environmental impacts. Therefore, in recent years, geosynthetic materials (geocomposites) have been employed as a replacement for granular filters...

.... The geometry of the geonet, particularly the inclined angle of the ribs, is found to be critical to the short- and long-term behavior of the geonet. In addition, the short- and long-term compressive behavior of the geocomposite was evaluated at horizontal (0°) and 1-to-4 (14.0°) to investigate the effects...

...D. J. White; M. M. Mekkawy; M. T. Suleiman; S. Sritharan ABSTRACT Laboratory tests involving a one-fourth scale bridge abutment, approach pavement, four different backfill materials, horizontal layers of geotextile reinforcement, and vertical geocomposite drainage systems were performed...

...T. Iryo; R. K. Rowe The behaviour of initially unsaturated soil–geocomposite layers in slopes subject to infiltration is investigated using numerical experiments. The post-infiltration performance is also studied. A series of transient finite element analyses of soil–geocomposite layers...

...W. Kongkitkul; D. Hirakawa; F. Tatsuoka; T. Uchimura To evaluate the deformation characteristics of geosynthetic reinforcement under cyclic loading conditions, a series of tensile loading tests were performed on three types of polymer geogrid and one type of geocomposite using a wide variety...

...J. P. Giroud; A. Zhao; H. M. Tomlinson; J. G. Zornberg The focus of this paper is on applications (e.g. some leachate collection layers in landfills) where a drainage system consists of a geocomposite overlain by a sand layer. If the geocomposite does not have sufficient flow capacity to convey all...

... Geonet Geocomposite Analytical Design Technical Paper by J.P. Giroud, J.G. Zornberg, and J.F. Beech HYDRAULIC DESIGN OF GEOSYNTHETIC AND GRANULAR LIQUID COLLECTION LAYERS COMPRISING TWO DIFFERENT SLOPES ABSTRACT: Liquid collection layers used in landfills often comprise two sections with different...

... collection layer Leachate collection layer Leakage collection layer Drainage layer Geosynthetic Geonet Geomat Geocomposite Radial flow Gravity flow Confined flow Unconfined flow Sump Technical Paper by J.P. Giroud and A. Zhao DESIGN OF LIQUID COLLECTION LAYERS WITH RADIAL FLOW ABSTRACT...

.... Geocomposites, which have a high compression modulus, high in-plane extensibility, low flexural stiffness, and ability to spread point loads from a subbase onto the subgrade, are more effective in reducing pumping. An anti-pumping geocomposite should also have a low short-term permeability to reduce the rapid...

...H. Zanzinger Geomembrane landfill basal liners must be protected from damage caused by overlying, large-particle leachate collection/drainage systems. Geosynthetics, such as geotextiles and geocomposites, are being used as protection layers for geomembrane liners. To date, there has been...

... and geocomposites. Although the structure of geotextiles and geocomposites has an effect on soil-reinforcement interface behaviour, mobilised pullout resistance is also affected by the axial tensile stiffness of geotextiles and geocomposites. Technical Paper by M.J. Lopes and M.L. Lopes SOIL-GEOSYNTHETIC...

...-2508, Telefax: 1/612-631-9334 1994 Pumping Fines Subgrade Subbase Highway Pavement Unit Cell Triaxial Pumping Cyclic Stress Cyclic Deformation Permanent Deformation Geotextile Geocomposite Separator ELT (equivalent loss of thickness) ...