Showing papers in "Geotextiles and Geomembranes in 2011"

TL;DR: In this article, a study of how the interface between ballast and geogrid copes with fouling by coal fines was presented, and the results indicated that geogriders increased the shear strength and apparent angle of shearing resistance, while only slightly reducing the vertical displacement of the composite geogrig-ballast system.

TL;DR: In this paper, a new design method for non-encased and encased stone columns is presented, where the initial stresses in the soil/column are taken into account, with the column considered as an elasto-plastic material with constant dilatancy, the soil as an elastic material and the geosynthetic encasement as a linear elastic material.

TL;DR: In this article, an analytical solution is presented to study soft soil improvement by means of encased stone columns to reduce both settlement and consolidation time, which is a simple and useful tool for design.

TL;DR: In this article, the hydration of different GCLs from the pore water of the underlying foundation soil is investigated for isothermal conditions at room temperature for three different reinforced (needle punched) GCL products.

TL;DR: In this paper, a series of undrained ring-shear tests were carried out on saturated samples with different fiber content and sand density, and the test results and mechanisms of fiber reinforcement were then analyzed.

TL;DR: In this article, a series of laboratory model tests on unreinforced and geogrid-reinforced sand bed resting on stone column-improved soft clay have been presented.

TL;DR: Electokinetic geosynthetics (EKG) as discussed by the authors can be made singly or from combinations of woven, nonwoven, needle punched knitted, extruded or laminated materials and can be formed in any 2D or 3D shape.

TL;DR: In this paper, a modification to BS8006 is proposed, which is shown to give comparable results to the German Standard EBGEO for situations where there is no subsoil support.

TL;DR: In this paper, the results of the laboratory tests were analyzed and simulated by 2D (axisymmetric) finite element method (FEM) to back-analyze and confirm the related design parameters which were used further in subsequent numerical experiments.

TL;DR: In this paper, the results of pullout tests aimed at studying the interaction of clays reinforced with geogrids embedded in thin layers of sand were presented after modification of the large direct shear apparatus.

TL;DR: In this paper, an elastoplastic constitutive model is used to simulate the mechanical behavior of unsaturated soil-geotextile interfaces using a specially modified direct shear apparatus.

TL;DR: In this paper, a mechanically stabilized earth (MSE) wall is modelled from two points of view: serviceability limit state (SLS) and ultimate limit state "ULS".

TL;DR: In this article, the responses of geogrids with rectangular and triangular apertures when subjected to a uniaxial tensile load at different directions relative to the orientations of ribs in air were investigated.

TL;DR: In this paper, the authors evaluate the durability of anti-reflective cracking systems that have a geosynthetic, geotextile or SAMI layer in the interlayer zone.

TL;DR: In this article, the performance of hybrid geosynthetic reinforced slopes, with permeable geoSynthetic as one of its components, for low permeable backfill slopes subjected to seepage was studied.

TL;DR: Torsional ring shear tests were performed on composite specimens that simulate the field alignment of municipal solid waste (MSW) landfill liner and cover system components as discussed by the authors, and the results revealed that shear strength of the composite liner system can be controlled by different failure modes depending on the magnitude of normal stress and the comparative values of the GCL interface and internal shear strengths.

TL;DR: The potential influence of consolidation effective stress, s 0, on the membrane behavior of a geosynthetic clay liner (GCL) containing sodium bentonite was evaluated in the laboratory by establishing differences in salt concentrations across specimens of the GCL in a flexible-wall cell under closed-system boundary conditions.

TL;DR: In this paper, a finite element procedure was used to investigate the reinforcement load and the deformation mode for geosynthetic-reinforced soil (GRS) walls subject to seismic loading during their service life, focusing on those with marginal backfill soils.

TL;DR: In this article, the behavior of geotextile-reinforced embankments during an earthquake was investigated using centrifuge model tests, considering a variety of factors such as gradient of slope, water content of soil, geotexxtile spacing, and input shaking wave.

TL;DR: In this article, a review of PVD laboratory testing is presented, where a minimum current density at appropriate applied voltage is required to benefit from the electric osmosis (EO) application.

TL;DR: In this article, the effects of using the new generation of reinforcement, grid-anchor, for the purpose of reducing the permanent settlement of these foundations under the influence of proportion of the ultimate load were investigated.

TL;DR: In this article, the combined effects of the viscoplastic nature of foundation soil and viscoelastic behaviour of geosynthetic reinforcement (polyester, polypropylene and polyethylene) are investigated.

TL;DR: In this paper, the authors describe the dynamic behavior of expanded polystyrene EPS geofoam, and show the dependence of shear modulus, G, and damping ratio, λ, on shear strain, γ, density, ρ, and confining stress, σ 3, through the results of a series of resonant column and strain-and stress-controlled cyclic compression tests.

TL;DR: This paper outlines the current “state of the art” in terms of the design and specification of geotextile sand containers (GSC) and covers the key issues which will ensure the long term integrity of a geotesxtile shoreline protection system is maintained.

TL;DR: In this article, a new procedure is proposed, called the "Force Procedure", which consists of measuring the force required to restrain a box on top of the interface beyond a limiting value of sliding displacement.

TL;DR: In this paper, a study of the frictional behaviour of geosynthetics used for municipal solid waste landfills is presented, where direct shear tests of several geomembrane/geotextile interfaces are performed to investigate the shear behaviour.

TL;DR: The potential for desiccation of GCLs in double composite liner systems under thermal gradients was experimentally investigated in this paper, where the effects of key initial and boundary conditions such as the GCL mass per unit area, initial GCL and subsoil water content, time lag between waste placement and temperature increase, the applied temperature gradient and the foundation layer thickness were investigated and discussed.

TL;DR: In this article, a series of uni-axial shaking table tests using stepwise intensified sinusoidal waves is performed on plane-strain geosynthetic-reinforced slopes to investigate the effects of wave frequency and amplitude to the seismic displacements.

TL;DR: In this paper, the formulation of the limit state for reinforcement tensile rupture is developed and the component strength reduction bias statistics identified, and the bias statistics from project-specific installation damage trials for use in reliability-based design for the reinforcement rupture limit state or using data from multiple sources for LRFD calibration.

TL;DR: In this article, an extended formulation for the structural and hydraulic design of geotextile dewatering tubes was developed within the scope of a study on the structural, hydraulic, and structural designs of geosynthetic dewatered tubes.