Opening size recommendations for separation geotextiles used in pavements

Narejo, Dhani

doi:10.1016/s0266-1144(03)00028-1

Cited by 22 publications

(6 citation statements)

References 6 publications

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“…Thus, this role is more critical, and more demanding, when the soil next to it is internally unstablehaving a major influence on the selection of an appropriate geotextile and on the long-term performance of the soil/geotextile system. Yet, in the case of dynamic loading, the current design criteria (Heerten, 1982;Holtz et al, 1997;Narejo, 2003) do not account for the internal stability of soils.…”

Section: (B)) a F-hmentioning

confidence: 99%

Filtration performance of non- woven geotextiles with internally-stable and -unstable soils under dynamic loading

Khan

Dawson

Marshall

2022

Geotextiles and Geomembranes

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Section: (B)) a F-hmentioning

confidence: 99%

Filtration performance of non- woven geotextiles with internally-stable and -unstable soils under dynamic loading

Khan

Dawson

Marshall

2022

Geotextiles and Geomembranes

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“…The vital function of PVD is the drainage capacity, which is controlled by membrane apertures [24,25]. The membraned aperture involved in the industry is quantitatively described by the pore-opening size O 95 , which corresponds to 5% sieving rate of particles.…”

Section: Modeling On Pvd Membranementioning

confidence: 99%

Numerical Investigating on Representativeness of Tracers in PIV Model Test of Dredged Slurry Treated by Vacuum Preloading

Wang

et al. 2021

Applied Sciences

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The vacuum preloading method is commonly adopted for improving the soft ground that the embankment of the railway line is laid on. The PIV (Particle Image Velocimetry) technique is a powerful tool in observing the formation of the soil column, a phenomenon that is unique to the dredged slurry when treated by vacuum preloading. However, it is not clear to what extent the motions of the slurry particles can be represented by the PIV tracers. In this paper, a mesoscopic model has been established by using the CFD-DEM method to reproduce the vacuum consolidation process of the slurry, in which the PVD (Prefabricated Vertical Drain) membrane, the slurry particles, and the tracers are described by the DEM, and the pore water is governed by the CFD method. Eight computational cases that can cover a broad range of material parameters governing the PIV model tests on the dredged slurry have been designed and studied by the established model. The representativeness of the PIV tracer is evaluated by comparing the statistic displacement of the tracer to that of the slurry particles. It is found that for the commonly used tracer, the carbon powder, can reliably represent the particle motions of the slurry since the difference in displacements of the tracer and the slurry particles is smaller than 6.5% if the diameter ratio between the tracer and the slurry particle is within 1.8.

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“…The ability of a geotextile to retain fines (e.g., suspended solids) depends primarily on its opening size [15]. The Pore Size (or Characteristic Opening Size) Test is designed to assess the mean size of the holes in the fabric.…”

Section: Geotextile Applications and Their Properties Of Relevance Fomentioning

confidence: 99%

Water Quality Improvement Performance of Geotextiles Within Permeable Pavement Systems: A Critical Review

Scholz

2013

Water

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Sustainable drainage systems (SuDS; or best management practices) are increasingly being used as ecological engineering techniques to prevent the contamination of receiving watercourses and groundwater. Permeable paving is a SuDS technique, which is commonplace in car parks, driveways and minor roads where one of their functions is to improve the quality of urban runoff. However, little is known about the water quality benefits of incorporating an upper geotextile within the paving structure. The review focuses on five different categories of pollutants: organic matter, nutrients, heavy metals, motor oils, suspended solids originating from street dust, and chloride. The paper critically assesses results from previous international tests and draws conclusions on the scientific rigour and significance of the data. Findings indicate that only very few studies have been undertaken to address the role of geotextiles directly. All indications are that the presence of a geotextile leads only to minor water quality improvements. For example, suspended solids are being held back by the geotextile and these solids sometimes contain organic matter, nutrients and heavy metals. However, most studies were inconclusive and data were often unsuitable for further statistical analysis. Further long-term research on industry-relevant, and statistically and scientifically sound, experimental set-ups is recommended.

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Opening size recommendations for separation geotextiles used in pavements

Cited by 22 publications

References 6 publications

Filtration performance of non- woven geotextiles with internally-stable and -unstable soils under dynamic loading

Filtration performance of non- woven geotextiles with internally-stable and -unstable soils under dynamic loading

Numerical Investigating on Representativeness of Tracers in PIV Model Test of Dredged Slurry Treated by Vacuum Preloading

Water Quality Improvement Performance of Geotextiles Within Permeable Pavement Systems: A Critical Review

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