...C. Yoo This paper presents the results of an investigation into the effect of decrease in drainage capacity by hydraulic deterioration of tunnel geosynthetic drainage systems on the structural performance of tunnel linings. The use of geosynthetics in tunnel construction is first introduced...

... analyses were performed at the onset of rainfall, during rainfall, and up to 24 h after rainfall. Further, the need for both drainage and reinforcement function in the reinforced slope was highlighted by analysing the effect of geotextile and geogrid layer inclusions separately on the slope subjected...

...C.A. da Silva; E.M. Palmeira ABSTRACT: Geocomposites for drainage are easy to transport and install in the field. These advantages are particularly important in regions of the world with poor transportation infrastructure and less specialised labour. However, the cost of geocomposites for drainage...

...J.P. Giroud; J.P. Gourc; E. Kavazanjian; Jr. ABSTRACT: Hydraulic transmissivity tests on common geosynthetic and granular drainage materials (e.g. geonets and gravel) show that the hydraulic transmissivity of these materials often depends heavily on the hydraulic gradient, which indicates...

... thickness is at least 20 times the size of the solid constituents of the drainage material, such as the diameter of the granular particles, or the diameter of geotextile fibers and geonet ribs. The specific surface area of a solid is defined as the ratio of the surface area and the volume of the solid...

... that have focused on GCBD technology as a subset of the broader field of water movement in unsaturated soil–geosynthetic systems. Drainage in the transport layer must occur under negative water pressures to preserve the capillary barrier: hence the transport layer is designed to be as transmissive...

...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...

... within the geotextile pore structure. 17 05 2005 16 02 2006 21 02 2006 © 2006 Thomas Telford Ltd 2006 Geosynthetics Filters Geotextiles Permeability Environmental engineering Drainage Laboratory tests Pollution migration/control Biological filtration...

... is conducted for a variety of soils, slopes and infiltration rates. The influence of these variables on the effectiveness of geocomposites as a drainage material and as a capillary barrier is discussed. The effect of entrapped air within a geotextile is also examined. This study shows that the geocomposite...

...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...

... 2000 8 12 2000 Industrial Fabrics Association International, 1801 County Road B West, Roseville, Minnesota 55113-4061, USA, Telephone: 1/612-222-2508, Telefax: 1/612-631-9334 2000 Liquid collection layer Drainage Landfill Slope Leachate collection Landfill cover Geosynthetic...

...E.M. Palmeira; M.G. Gardoni Nonwoven geotextiles have been used for drainage and filtration in geotechnical engineering works for many years. Concerns related to drainage capacity and clogging potential still remain as factors that restrain a broader use of geotextiles for drainage systems...

...-2508, Telefax: 1/612-631-9334 1999 Geotextile Geocomposite Pumping Anti-pumping Fines Pavement Reinforcement Separation Drainage Cyclic loading Technical Paper by I. Alobaidi and D.J. Hoare MECHANISMS OF PUMPING AT THE SUBGRADE-SUBBASE INTERFACE OF HIGHWAY PAVEMENTS ABSTRACT: Research...

... Industrial Fabrics Association International, 1801 County Road B West, Roseville, Minnesota 55113-4061, USA, Telephone: 1/612-222-2508, Telefax: 1/612-631-9334 1998 Geonet Drainage Transmissivity Relative permeability Compressive stress Hydraulic gradient Technical Paper by R.J. Fannin, H.W...

... of data available, the methodology described may provide a useful tool for the study of geotextile pore opening sizes under confining pressure. Geotextile Pore opening size Filtration Drainage Confining pressure 1 7 1997 18 11 1997 18 12 1997 Industrial Fabrics Association...