Calculating local geomembrane strains from a single gravel particle with thin plate theory

Eldesouky, H.M.G.; Brachman, R. W. I.

doi:10.1016/j.geotexmem.2017.10.007

Cited by 29 publications

(7 citation statements)

References 22 publications

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“…Marcotte and Fleming (2021) directly measured strains on a white geomembrane by observing the deformation of a grid pattern on the bottom of the geomembrane while maintaining the deformed shape in place using epoxy resin. The results agreed with the general trend of the finite element modelling by Eldesouky and Brachman (2018). An empirical relationship was developed to "correct" the estimated strains calculated using the Tognon et al (2000) method and the resulting "corrected Tognon method" better predicted the location and magnitude of geomembrane strains when compared to the measured grid (Marcotte and Fleming 2021).…”

Section: Background On Geomembrane Strainsupporting

confidence: 68%

Design guidance for protection of geomembrane liners in landfill applications

Marcotte¹,

Fleming

2022

Can. Geotech. J.

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A new method of evaluating strains and predicting required protection layers that are placed over geomembranes is developed based on the combined effects of the clay strength and stiffness and the cushioning effect of a nonwoven protection layer. Plots giving the required geotextile protection for different maximum strains are presented for expected landfill pressures under 300 kPa for angular, 38 mm gravel placed above a geomembrane liner for both drained and undrained loading conditions of the clay. A similar plot is also given for tire-derived aggregate placed above the liner for pressures under 500 kPa for undrained loading conditions. All tests were conducted at room temperature. For all cases, nonwoven geosynthetic protection layers with mass per unit area (MUA) exceeding at least 1200 g/m2 were required to limit long-term strains below current threshold levels. The MUA of the protection layer, for the particular aggregates and geomembranes tested, is dependent on the loading rate, water content relative to optimum, the silt content, and the activity of the clay below.

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Section: Background On Geomembrane Strainsupporting

confidence: 68%

Design guidance for protection of geomembrane liners in landfill applications

Marcotte¹,

Fleming

2022

Can. Geotech. J.

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“…The method advocated by Tognon et al (2000) is based on a combination of membrane and bending theory, and has been shown to be most reliable (Rowe & Yu 2019). Although the method advocated by Eldesouky and Brachman (2018) shows promise and is of significant value in that it acknowledges the increased strain effect due to aggregate rotation on slopes. Rowe & Yu (2019) show that under particular loading conditions, the geomembrane peak tensile strain is related to particle size, with 16% strain for a 25 mm particle and 32% for a 50 mm particle above the geomembrane without protection layer.…”

Section: Perceived Performance Of Geotextile Cushion Layers Above Geomentioning

confidence: 99%

An economy and ecosystem symbiosis: barrier systems for water conservation and pollution control

Legge¹

2019

Proceedings of the 22nd International Conference on Paste, Thickened and Filtered Tailings

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An awareness of the rate at which water resource development took place in South Africa being supply driven, until relatively recent times, leads to an appreciation of the changing philosophy in respect of water conservation and pollution control, as well as essential amendment to principles and procedures. Reconciling water demand and supply in catchments requires concurrent consideration of available water quantity and quality. This stimulates the need for change in the way we view water uses and brings about business opportunities in the sector. The review of infrastructure designs in support of water use and mining applications for industrial and mining waste has developed and transformed along with improved technology and changes in legislation since 1994 in South Africa. A containment barrier system comprises of both filter protected drains and low permeability liners which are visible in the short term until covered. They are required to perform effectively after initial use and are often inaccessible for the operating period and subsequent service life of decades or even centuries. This paper presents a regulator's perspective of commonly repeated deviation from accepted norms and standards in the engineering profession, as applied to pollution control facilities. Emphasis is placed on the standards of today with experience reflecting on the past five years of design reviews, leading to conclusions and recommendations for facility owners and practitioners. Examples of procedure, mechanisms, performance, specifications and socioeconomic benefits are addressed. It is postulated that in the near future many mining and industrial developers will choose to improve containment standards of barrier systems as a component of reengineering water demands and for economic advantage while embracing contributions from ecosystem services.

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“…GMBs used in TSF are usually either high-density (HDPE) or linear low-density (LLDPE) polyethylene with a typical thickness of 1.0 to 2.5 mm [5,8]. With a GMB liner at the base of a TSF impoundment, the leakage is effectively limited to flow through GMB defects that commonly arise either during construction or subsequently due to longterm stress cracking [10,[12][13][14][15][16][17][27][28][29][30][31][32][33]. A geosynthetic liner leakage simulator (GLLS) was developed by Brachman et al (2017) [34] to study the leakage through a circular GMB hole in tailings storage applications under simulated field conditions.…”

Section: Introductionmentioning

confidence: 99%

The Application of Geosynthetics in Tailings Storage Facilities: A General Review

Rowe,

Fan

2024

Mining

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This paper is a summary of many of the key findings on the application of geosynthetics in tailings storage facilities. Topics include the compressibility and permeability of tailings, the equations predicting leakage through circular and non-circular geomembrane holes, the effect of the subgrade permeability, and the effect of a lateral drainage system within tailings on leakage predictions. Two commonly encountered engineering problems relating to the piping through circular geomembrane holes and the opening width of non-circular defective geomembrane seams are given to demonstrate the potential application of leakage prediction equations. Meanwhile, issues related to the subgrade imperfection and the long-term performance of both high-density polyethylene (HDPE) and bituminous geomembranes in tailings storage applications are addressed. The research highlights that an appropriate HDPE geomembrane liner can be expected to perform very well for an extremely long time, limiting leakage and contaminant migration from the facility into the surrounding environment if the liner is well constructed on a suitable subgrade.

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Calculating local geomembrane strains from a single gravel particle with thin plate theory

Cited by 29 publications

References 22 publications

Design guidance for protection of geomembrane liners in landfill applications

Design guidance for protection of geomembrane liners in landfill applications

An economy and ecosystem symbiosis: barrier systems for water conservation and pollution control

The Application of Geosynthetics in Tailings Storage Facilities: A General Review

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