Geotextiles and Geomembranes

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Use of an apron to stabilize geomembrane tubes for fighting floods

Meeok Kim, Marcos Freeman, Brendan T. FitzPatrick, David B. Nevius, more

Geotextiles and Geomembranes > 2004 > 22 > 4 > 239-254

The most common temporary flood-fighting technique is the construction of piles of sandbags. A recent alternative is the use of inflated geomembrane tubes (which are also used as cofferdams). One of the problems with these tubes is the possibility of sliding or rolling when they are subjected to water on one side. This can be mitigated by friction underneath an apron attached to the tube and spread...

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A synthesis of case histories on GRS bridge-supporting structures with flexible facing

Kevin Z.Z. Lee, Jonathan T.H. Wu

Geotextiles and Geomembranes > 2004 > 22 > 4 > 181-204

This paper synthesizes the measured behavior and experiences gained from case histories of geosynthetic-reinforced soil (GRS) bridge-supporting structures with ''flexible'' facings. Only bridge-supporting structures with wrapped-face, modular block face, and rock face are included in the synthesis. The case histories were grouped into two categories: in-service structures and field experiments. Four...

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Poisson's ratio of unreinforced geomembranes and nonwoven geotextiles subjected to large strains

J.P. Giroud

Geotextiles and Geomembranes > 2004 > 22 > 4 > 297-305

It is well known that incompressible materials have a Poisson's ratio of 0.5. In fact, this is true only in the case of small strains. This technical note presents an equation for the Poisson's ratio of incompressible materials subjected to large strains. This equation can be used for materials which can be assumed to be incompressible, such as some unreinforced geomembranes. Also, the equation is...

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Lateral and axial deformation of PP, HDPE and PET geogrids under tensile load

Masahiro Shinoda, Richard J. Bathurst

Geotextiles and Geomembranes > 2004 > 22 > 4 > 205-222

The paper describes a series of short-term in-isolation tensile tests that were carried out to investigate the load-strain-time performance of typical knitted polyester (PET), biaxial polypropylene (PP) and uniaxial high-density polyethylene (HDPE) geogrid products. The specimens were subjected to constant rate of strain (CRS) loading and variable rate of strain (VRS) loading. Variables between test...

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Natural weathering of textiles used in agricultural applications

W. Dierickx, P. Van Den Berghe

Geotextiles and Geomembranes > 2004 > 22 > 4 > 255-272

In-field research was carried out on five agrotextiles which were exposed to natural weathering for 5 years. Prior to weathering and each subsequent year of exposure, samples were taken to evaluate tensile strength, strain at break, thickness and mass per unit surface. The results show that the effect of weathering is material dependent. The two polyvinyl chloride (PVC)-coated polyester materials...

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A mathematical model for the strain-rate dependent stress-strain response of HDPE geomembranes

J. Wesseloo, A.T. Visser, E. Rust

Geotextiles and Geomembranes > 2004 > 22 > 4 > 273-295

Tensile tests performed at different strain rates on HDPE geomembranes show that both the strength and the stiffness of the geomembrane decrease with a decrease in the strain rate. The quantification of the strain-rate dependent stress-strain response of HDPE geomembranes is crucial for the design of any geomembrane structure of which the geomembranes are strained at a lower rate than the rate at...

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Development of a hyperbolic constitutive model for expanded polystyrene (EPS) geofoam under triaxial compression tests

Byung Sik Chun, Hae-Sik Lim, Myung Sagong, Kyungmin Kim

Geotextiles and Geomembranes > 2004 > 22 > 4 > 223-237

Triaxial tests were conducted to develop a constitutive model of cellular type expanded polystyrene (EPS) geofoam block under short-term (immediate) loading. Specimens of EPS geofoam with densities of 15, 20, 25, and 30kg/m ³ were tested under confining stresses of 0, 20, 40, and 60kPa.Test results show that EPS geofoam displays nonlinear major principal stress-strain behavior, which is a...

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Geotextiles and Geomembranes

Use of an apron to stabilize geomembrane tubes for fighting floods

A synthesis of case histories on GRS bridge-supporting structures with flexible facing

Poisson's ratio of unreinforced geomembranes and nonwoven geotextiles subjected to large strains

Lateral and axial deformation of PP, HDPE and PET geogrids under tensile load

Natural weathering of textiles used in agricultural applications

A mathematical model for the strain-rate dependent stress-strain response of HDPE geomembranes

Development of a hyperbolic constitutive model for expanded polystyrene (EPS) geofoam under triaxial compression tests

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INFONA - science communication portal

Geotextiles and Geomembranes

Use of an apron to stabilize geomembrane tubes for fighting floods

A synthesis of case histories on GRS bridge-supporting structures with flexible facing

Poisson's ratio of unreinforced geomembranes and nonwoven geotextiles subjected to large strains

Lateral and axial deformation of PP, HDPE and PET geogrids under tensile load

Natural weathering of textiles used in agricultural applications

A mathematical model for the strain-rate dependent stress-strain response of HDPE geomembranes

Development of a hyperbolic constitutive model for expanded polystyrene (EPS) geofoam under triaxial compression tests

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