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Showing 1 to 20 of 55 for “"geosynthetic"”.
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Laboratory Performance of Geosynthetic-Stabilized Pavement Sections
… performance of pavements with and without geosynthetic stabilization. This was accomplished by the testing of a total of 18 pavement sections which could be classified into four different types: one which was constructed without geosynthetics and which served as a control, and three which …
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Two-Dimensional Analysis of Stacked Geosynthetic Tubes
Geosynthetic tubes filled with a slurry-mix are considered. The mix is usually dredged from a nearby area and pumped directly into the tubes. The tubes are used in a variety of applications including breakwaters, groins, and temporary levees. This thesis considers single and stacked geosynthetic …
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An Investigation of the Effects of Specimen Gripping Systems on Shear Stress at the Geosynthetic/Geosynthetic Interface in Landfill Applications
The use of geosynthetics has rapidly increased in nearly all geotechnical related fields as they allow for innovations, improved performance and cost effectiveness in projects. However, when geosynthetics are installed on sites, particularly on landfill slopes, their interface interaction against …
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Field Performance of Exposed Geosynthetic Composite Liner Systems
Geosynthetic clay liners (GCL) overlain by a geomembrane (GMB) in a geosynthetic composite liner system in landfill liner and other waste containment applications can be left exposed for weeks, months, or in some extreme cases, even years. Three known consequences of leaving a GMB-GCL composite …
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Deformation prediction of geosynthetic reinforced soil retaining walls
A program to investigate the behavior of geosynthetic reinforced soil and the deformation of geosynthetic reinforced soil retaining walls is presented. This investigation included laboratory testing of geosynthetic reinforcements and geosynthetic reinforced cohesionless soils, and finite element …
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Field scale trials of a geosynthetic capillary break
… field testing of a newly-developed product, a geosynthetic capillary break (GCB). The GCB was developed for use in engineered soil covers when a cover incorporating a capillary break effect would be desirable, but the coarse-grained material (gravel or sand) is unavailable or uneconomical. …
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Evaluating Performance of Hybrid Geosynthetic-Reinforced Retaining Walls
Geosynthetic-Reinforced Retaining (GRR) walls have been extensively used in highway projects. A novel GRR wall was proposed to mitigate the problems (e.g. high connection stress) resulting from the relatively large spacing of primary reinforcement. This new GRR wall has secondary reinforcement …
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HYDRAULIC PERFORMANCE OF GEOSYNTHETIC LINERS IN TAILINGS STORAGE FACILITIES
Experiments are conducted to investigate the impact of fines content on the compressibility and permeability of the cyclone tailings, and to quantify leakage through a GMB hole overlain by saturated tailings. The effect of hole shapes, hole sizes, GMB thicknesses, tailings thicknesses, tailings …
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Dimensional Stability of Geosynthetic Clay Liners in Landfill Applications
… related to the dimensional stability of geosynthetic clay liners (GCLs) in landfill applications. Multiple occurrences of panel separation of overlap seams in GCLs have been documented; however, explanation for the relative contribution of various mechanisms causing shrinkage has been …
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Laboratory measurements of load-transfer in geosynthetic reinforced soils
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Design of Bridging Layers in Geosynthetic-Reinforced Column-Supported Embankments
Column-supported geosynthetic-reinforced embankments have great potential for application in soft ground conditions when there is a need to accelerate construction and/or protect adjacent facilities from the settlement that would otherwise be induced by the new embankment load. The columns in …
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Geosynthetic stabilization of unpaved roads on soft ground : a field evaluation
… out to investigate the performance of different geosynthetics in unpaved road construction over soft ground. The test site comprises five 16 m long, by 4.5 m wide test sections, built on a subgrade of undrained shear strength approximately 40 kPa. One is unreinforced and serves as a control …
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Development and Use of Moisture-Suction Relationships for Geosynthetic Clay Liners
… determine the moisture-suction relationships of geosynthetic clay liners (GCLs). Moisture-suction relationships were determined by combining suction data from pressure plate tests, contact filter paper tests, and relative humidity tests, then fitting water retention curves (WRCs) to the data. …
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Centrifuge modelling of the behaviour of geosynthetic-reinforced soils above voids
… the deformation mechanisms of soils and geosynthetics in response to the formation of a void below a geosynthetic-reinforced soil is crucial to provide efficient designs of geosynthetic-reinforced soil systems such as embankments and landfill liners. Centrifuge modelling of the soil and …
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Reinforcement of pavement subgrade using granular fill and a geosynthetic layer
… strength of the soil structure. The use of geosynthetics in soil offers a better alternative to improvement of the soil's stability. This research was conducted to determine the degree of improvement of the load-bearing capacity and reduction in settlement due to geosynthetic reinforcement …
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Three-Dimensional Analysis of Geosynthetic Reinforcement Used in Column-Supported Embankments
… popular over the years is a column-supported, geosynthetic-reinforced embankment. This system consists of strong columns or piles placed in soft clay, a bridging layer of sand or sand and gravel, and one or more layers of geosynthetic reinforcement. It is often used in soft ground situations …
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Selected factors affecting measurement of the hydraulic conductivity of geosynthetic clay liners
Geosynthetic clay liners (GCLs) are thin (~7 to 10 mm), factory manufactured hydraulic barriers typically comprising a layer of sodium bentonite sandwiched between two geotextiles. Upon hydration and permeation with water at low effective stress (σ´) (e.g., typically ≤ ~30 kPa [4 psi]), the …
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Finite element study of geosynthetic encased stone columns in sensitive soft clay
… FEA was then used to simulate the performance of geosynthetic-encased stone columns. A new stone column element and a geo-encasement element were developed and coded into AFENA. The stone column simulations were then done for both non-sensitive soils (represented by Modified Cam Clay model) and …
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Effects of Freezing Temperature on Interface Shear Strength of Landfill Geosynthetic Liner
… state regulations. Hence, application of geosynthetic materials as landfill bottom liners and capping systems has seen a substantial increase over the past few decades. The present work emphasizes the shear strength of geocomposite clay liner (GCL) and geomembrane interface in landfills. …
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Geosynthetic Reinforced Soil: Numerical and Mathematical Analysis of Laboratory Triaxial Compression Tests
Geosynthetic reinforced soil (GRS) is a soil improvement technology in which closely spaced horizontal layers of geosynthetic are embedded in a soil mass to provide lateral support and increase strength. GRS is popular due to a relatively new application for bridge support, as well as long-standing …
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