geogrid Articles

  • Bearing Capacity of Strip Foundation on Geogrid-Reinforced Clay

    Laboratory model test results are presented for the ultimate bearing capacity of a strip foundation supported by a saturated clay layer reinforced by layers of geogrid. The tests were conducted in one type of clay. The average moisture content of the clay was varied, yielding varying undrained shear strengths. Laboratory tests were conducted to determine the critical nondimensional values for the ...


    By ASTM International

  • Enhancement of the Uplift Capacity of Buried Pipelines by the Use of Geogrids

    The paper presents the results of preliminary tests that were conducted to investigate the possible use of geogrids for increasing the uplift resistance of buried pipelines. The results of the preliminary experimental investigations suggest that the uplift capacity of a pipeline section can be increased quite significantly by the incorporation of geogrids at the crown region of the pipeline in an ...


    By ASTM International

  • Ultimate Bearing Capacity of Rectangular Foundations on Geogrid-Reinforced Sand

    Model test results for the ultimate bearing capacity of rectangular surface foundations supported by geogrid-reinforced sand are presented. The tests were conducted using one type of sand at one relative density of compaction with only one type of geogrid. The length-to-width ratios of the model foundations were varied as 1, 2, 3, and 8. Based on the model test results, the maximum required ...


    By ASTM International

  • Pullout Resistance of Steel Geogrids with Weathered Clay as Backfill Material

    The pullout resistance of welded steel geogrid reinforcement embedded in poor-quality, cohesive-frictional backfill material such as weathered clay was investigated. Laboratory pullout tests were conducted on various reinforcement sizes, mesh geometry, and compaction conditions of the backfill material. Field pullout tests were also conducted to investigate the pullout resistance of ...


    By ASTM International

  • Effects of Sustained and Repeated Tensile Loads on Geogrid Embedded in Sand

    Design methods for reinforced soil structures under static loading conditions are relatively well established. Little research has been conducted on the behavior of embedded geosynthetics subjected to repeated loadings. Such research is needed to improve the design of reinforced soil structures subjected to traffic and seismic loadings. The study reported here is related to the long-term ...


    By ASTM International

  • Soil-Geogrid Reinforcement Interaction by Pullout and Direct Shear Tests

    Pullout and direct shear tests have been conducted to investigate the soil-reinforcement interaction behavior in pullout and direct shear mechanisms. An apparatus—discussed in this paper—has been developed that is capable of performing both pullout and direct shear tests. Displacement measurements to monitor dilatancy on the backfill soil during pullout tests are incorporated in the apparatus. ...


    By ASTM International

  • Strata Geogrid helps turn unusable land into premium Airport Parking in Seattle, WA

    Challenge Sea-Tac International Airport in Seattle, WA has grown to become the 18th busiest airport in the country and the need for convenient parking is a growing concern. To help provide needed parking, one of the area’s leading parking services, MasterPark Inc., sought to turn unusable land near the airport into a valuable $20-per-night parking lot. Five retaining walls up to 33 ...


    By Strata Systems, Inc.

  • A grid for subgrade stability

    With research to back up quantifiable benefits and recognized design standards, the use of geogrids may be ready for wider acceptance among North American railroads. A product with a 20-year plus track record is rarely referred to as "new." However, this is a label those involved with geogrids find themselves tagged with when it comes to the prod¬uct's use on North American railroads. While ...


    By Tensar International

  • Construction of a beltway in Bremen progresses case study

    Geogrids secure embankment reinforcements The western bypass around Bremen is not scheduled for completion until about 2011. Section 1 of the second construction phase has been under construction since 2002. The 3.3 km long core stretch of A281 is construction section 2/1. Its most prominent structure will be a 127 m long cable-stayed bridge supported by 50 m high pylons to be built over the ...


    By NAUE GmbH & Co.KG

  • Commerce Park Giesen-Harsum-Hildesheim case study

    Building on an old dump The communities Giesen and Harsum along with the City of Hildesheim, Germany jointly planned the construction of a commerce park covering an area of 240ha. The section of the premises on which buildings were to be erected encompassed an area of 50ha. The only access road passed over a former garbage and building-trash landfill. Dumping in this area was ...


    By NAUE GmbH & Co.KG

  • Clemson road bridge case study

    Background The South Carolina Department of Transportation (SCDOT) needed to provide a right-of-way for an access road adjacent to a CSX Railroad line. The proposed Clemson Road Bridge overpass was a challenging project and SCDOT had three choices: Option 1: Construct a 1H:1V Reinforced Soil Slope (RSS) at the northern bridge abutment. Option 2: Lengthen the northern ...


    By Strata Systems, Inc.

  • Erosion control and slope stability project case study

    The steep un-vegetated slope at this lakeshore residence was eroding into the lake with every rain event. Record high lake levels combined with wave action eroded the base of the hillside causing severe hillside instability. During heavy rainfall events more and more of the hillside slipped into the stairwell and lake. The residence owner was concerned with preserving the slope, overlook ...


    By Envirolok LLC

  • Shear Strength Tests for Coarse Granular Backfill and Reinforced Soils

    In order to overcome the limitations of the current standard small direct shear box in testing the shear strength of coarse granular backfill materials, a large direct shear apparatus (1000 by 1000 by 940 mm) was constructed at Carleton University and a series of direct shear tests were conducted with coarse granular soils. In addition, several direct shear tests on soils reinforced with geogrids ...


    By ASTM International

  • Ämmässuo landfill, Finland case study

    Opened in 1987, the municipal landfill Ämmässuo in Finland extends over 50 ha, making it one of the largest in all of Scandinavia. Two test fields were set up to find a suitable solution for the surface sealing system and future slope reinforcement The structure of these fields consists of a mineral gas-drain layer, a mineral sealing layer, a geosynthetic clay liner, a protection ...


    By NAUE GmbH & Co.KG

  • Titan Geosynthetics: A Major Solution for CN Rail - Case Study

    The Canadian National Railway (CN Rail) wanted to build an additional 6-track extension at the Transcona yard in Winnipeg, Manitoba. Heavy rail cars were expected to pass over this extension area and CN Rail was looking for an economical, fast, environmentally friendly and technically sound solution for their track extension. The site had swampy conditions with wet and soft clay soils. In fact, ...

  • Federal motorway A6 Mannheim-Heilbronn case study

    Stable RiStWag -construction guidelines for roadways in water preservation areas Included in the A6 federal motorway construction project lot Mannheim – Heilbronn/Weinsberg, AS Bad Rappenau – AS Neckarsulm is the widening of km 631+640 and km 641+060 to six lanes. This section is runs through a water preservation zone, type IIIa, protected under RiStWag. Because of this, a ...


    By NAUE GmbH & Co.KG

  • Case Study - Steep slope erosion control (Bijao Beach Resort,Santa Clara, Panama)

    Background: The Bijao Beach Resort community resides in the balmy region of Panama near Santa Clara’s beaches. It was constructed as a luxury resort to compete with nearby Playa Blanca and Decameron. An artificial mountain was created to enhance the geography of the resort. Native soil of the area was compacted and stabilized with biaxial geogrid, but rain has wreaked havoc upon ...


  • Steep Slope Erosion Control (Bijao Beach Resort,Santa Clara, Panama) case study

    Background: The Bijao Beach Resort community resides in the balmy region of Panama near Santa Clara’s beaches. It was constructed as a luxury resort to compete with nearby Playa Blanca and Decameron. An artificial mountain was created to enhance the geography of the resort. Native soil of the area was compacted and stabilized with biaxial geogrid, but rain has wreaked havoc upon the ...

  • Pace properties case study

    Background Available property for development within the Interstate 285 perimeter in Atlanta is becoming increasingly scarce. A northwest portion of metropolitan Atlanta was becoming progressively more congested and sites previously considered too expensive or difficult to build upon were being targeted for development. The owners wanted to develop this site for a motel/suites ...


    By Strata Systems, Inc.

  • Q&A with Karan Jalota, Application Specialist - Roads & Rail

    In 2004, Dr. J.P. Giroud and Dr. Jie Han advanced the field of geosynthetics when they published their methodology for applying geosynthetics in unpaved structures in the ASCE Journal of Geotechnical and Geoenvironmental Engineering. The methodology has since been adopted by the Federal Highway Administration in 2008, and is considered at the forefront among industry professionals. Karan Jalota, ...


    By Nilex

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