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Showing 1 to 20 of 21 for “"Geogrid"”.
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Performance of Geogrid Reinforced Ballast under Dynamic Loading
Railroad ballast consists of open graded crushed stone used as a bed for railroad track to provide stability. It plays a significant role in providing support for the track base and distributing the load to the weaker subgrade below. Ballast also helps with drainage, which is an important factor …
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Laboratory performance of geogrid and geotextile reinforced flexible pavements
Geotextile and geogrid reinforcement in flexible pavements were evaluated to determine potential benefits. Laboratory pavement sections were constructed, tested, and analyzed to assess the performance of reinforced pavement sections compared to sections without geosynthetic reinforcement. The …
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Development of a Mechanistic Model for Geogrid Reinforced Flexible Pavements
… a mechanistic response model for the analysis of geogrid base reinforced flexible pavements and to investigate the response benefit of geogrid-reinforcement. This is an axisymmetric finite element structural model that considers the nonlinear, stress dependent pavement foundation geomaterials, …
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Three-Dimensional Analysis of Geogrid Reinforcement used in a Pile-Supported Embankment
Pile-supported geogrid-reinforced embankments are an exciting new foundation system that is utilized when sites are limited by a soft soil or clay. In this system, an embankment is supported by a bridging layer, consisting of granular fill and one or multiple layers of geogrid reinforcement. The …
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Development and application of bender element field sensor for pavement base/subbase modulus characterization and geogrid effectiveness evaluation
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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An investigation of the effect of dynamic and static loading to geosynthetic reinforced pavements overlying a soft subgrade
… In this study, reinforcement geosynthetics (geogrids and geotextiles) were used as reinforcement inclusions within a granular base overlying a soft subgrade of California Bearing Ratio (CBR) less than 2% in a 1.0 m3 steel test box. Firstly, a geotextile/geogrid was placed at the interface …
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Evaluating Performance of Hybrid Geosynthetic-Reinforced Retaining Walls
… (1) a hybrid GRR wall section with uniaxial geogrid layers as primary and secondary reinforcement, (2) a hybrid GRR wall section with uniaxial geogrid layers as primary reinforcement and with biaxial geogrid layers as secondary reinforcement, and (3) a GRR wall section with uniaxial geogrid …
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Behaviour of buried pipes adjacent to ground voids under dynamic loading
… void presence under the protection of the geogrid reinforcing layers subjected to incrementally increasing cyclic loading. The presence of voids located at the spring-line of the flexible buried pipes, led to a considerable increase in the soil surface settlement, pressure recorded at the …
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Assessment of Improvement in Unpaved Roadway Performance Using 3D Geogrids Under Cyclic Loading
<p>Geogrids have been used for decades to improve the performance in both paved and unpaved road construction. This research focuses on quantifying the performance and optimizing the design of unpaved roadways using the results from an extensive cyclic triaxial testing program. Twenty-seven cyclic …
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Mechanistic-Empirical Pavement Design Procedure For Geosynthetically Stabilized Flexible Pavements
… were stabilized with geotextiles and three with geogrids at the base course-subgrade interface. The remaining three sections were kept as control sections. One of each stabilization category was included in each base course thickness group. The hot-mix asphalt (HMA), SM-2A, wearing surface …
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Laboratory Performance of Geosynthetic-Stabilized Pavement Sections
… were stabilized with one of two geotextiles or a geogrid. The pavement sections were constructed to model a typical secondary road in Virginia which is constructed over a silty sand subgrade material. Loading of the pavement sections was accomplished through the use of a computer-controlled …
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In-Situ Behavior of Geosynthetically Stabilized Flexible Pavement
… were constructed with either geotextile or geogrid stabilization or no stabilization. Woven geotextile was used in sections 2, 5 and 8. Geogrids were used in sections 3, 6 and 9, and sections 1, 4 and 7 were controls. Six Falling weight deflectometer (FWD) tests were performed on all the …
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A study of the response of geosynthetic reinforced flexible pavement test sections to dynamic loading
… were used: two types of woven geotextiles; and a geogrid. The test sections were constructed, cyclically loaded, and the resulting data were collected and analyzed. The performance of reinforced test sections was compared to that of unreinforced sections to estimate any improvement due to the …
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Geosynthetic stabilization of unpaved roads on soft ground : a field evaluation
… include a geotextile, and one includes a geogrid. Each test section incorporated a variable thickness of sandy gravel base course material, between 25 and 50 cm thick. They were trafficked in sequence by a vehicle of standard axle load. An important governing parameter for interpretation …
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Three-Dimensional Analysis of Geosynthetic Reinforcement Used in Column-Supported Embankments
… parameters. The parameters varied involved the geogrid properties (Poisson's ratio, modulus of elasticity, and thickness), the vertical load, the soil stiffness above the piles, the soil stiffness between the piles, the size of the piles, and the distance between the piles.
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Field-Scale Monitoring and Laboratory Simulation of Geosynthetic Liners During Construction and After Placement of Waste
… displacements were detected in the gravel, geogrid, and geotextile (up to 420 mm), with only minor movements in the geomembrane (less than 35 mm). Placement of waste (to-date 2/3rd up slope) has generated only small (1-2 mm) relative displacements between the gravel and geomembrane and the …
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Comparison of shear strength properties of textured polyethylene geomembrane interfaces in landfill liner systems
… against different geosynthetics; geotextiles, geogrid and geosynthetic clay liners (GCLs), typically used in South African landfill base liners and capping systems. Tests were performed using a modified 305 x 305 mm x 100 mm large direct shear box over a range of normal pressures of 25, 50, …
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Integrated computational and experimental framework for the assessment of railroad ballast life-cycle behavior
… computational-experimental framework, effects of geogrid reinforcement and presence of moisture on ballast at different stages of its life-cycle have also been investigated. Furthermore, full validation of the framework approach was accomplished through field testing efforts; ballast settlement …
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Critical height and surface deformation of column-supported embankments
… or more layers of high-strength geotextile or geogrid reinforcement. Mobilization of the mechanisms of load transfer in a column-supported embankment requires some amount of differential settlement between the columns and the embankment as well as between the columns and the foundation soil. …
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