soil reinforcement Articles

  • Effect of Reinforcement Layout on Soil Strength

    This paper presents the results of a laboratory investigation of the shear strength of soil reinforced with metal strips. The investigations were conducted using a large, specific purpose-built shear box. The effects of reinforcement layout, as well as type of strips and quantity of reinforcement, on soil shear strength at failure were tested. The investigations involved three reinforcement ...


    By ASTM International

  • Determination of Design Parameters of a Mesh-Type Soil Reinforcement

    Problems in determining design parameters of a new mesh-type soil reinforcement are investigated. A special apparatus referred to as the split-box was developed to enable measurement of design parameters with large-scale laboratory tests. In addition to the scale of the tests, the design innovations of the split-box ensure reliability of test results, as verified by a number of calibration tests. ...


    By ASTM International

  • Reinforcing Soil with Aligned and Randomly Oriented Metallic Fibers

    Laboratory direct shear box tests were used to evaluate the strength behavior of a reinforced uniform silty sand. The reinforcement elements consisted of flexible, semirigid, and rigid metallic fibers. The orientations of the fibers to the shear plane were varied and had a marked effect on the shear resistance. Increases in peak and residual strengths of 100 and 300%, respectively, were observed ...


    By ASTM International

  • Soil Reinforcement: Tunnel Portals - Case Study

    Problem The A1 Autostrada, known as Autostrada del Sole (Motorway of the sun), runs for 750km from Milan to Naples, via Bologna, Florence and Rome. Not only is it the longest motorway in Italy, it is considered to be the key corridor in the country’s highway network.  To improve safety, reduce congestion and consequent environmental pollution, a new section of the A1 was proposed in ...


    By Officine Maccaferri S.p.A.

  • Properties and Applications of Soil Reinforced With Recycled Fibers

    This paper reports on a research project on the use of recycled carpet and textile fibers for soil reinforcement. Laboratory evaluation of soil reinforced with different recycled fibers, different processing conditions and different dosage rates has been conducted. Their effects on soil compaction characteristics and triaxial compressive behavior are ...


  • The Basics of Slope Stability Analysis for Geosynthetics

    Slope stability analysis is vital to preventing slope failures in a variety of engineering applications including landfill design, roads, dams and embankments, to name a few. Proper analysis anticipates both natural and manmade slopes and failure of foundations and retaining walls. This blog covers the necessity of slope stability analysis, how to conduct the analysis and the role of ...


    By Agru America, Inc.

  • 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

  • Reinforced Soil within a Retaining wall provides solution for a factory site in Goa

    In order to ensure stability, Maccaferri India installs the MacRES Reinforced Soil (RS) wall system with concrete panel fascia and ParaWeb soil reinforcement into the Goa Industrial Construction site. Watson Pharma Pvt. Ltd. a global pharmaceutical company proposed to build a full fledged manufacturing unit at Verna, Goa. Verna Industrial Estate is located approximately 10 km north of the South ...


    By Officine Maccaferri S.p.A.

  • Large-Scale Triaxial Compression Testing of Geocell-Reinforced Granular Soils

    The paper describes the results of a series of large-scale triaxial tests carried out on 200-mm-high isolated geocell-soil composite specimens and unreinforced soil specimens. Two different aggregate soils were used in the test program. The reinforced specimens were tested with a height-to-diameter ratio of unity, which matches the dimensions of these systems in a typical base reinforcement ...


    By ASTM International

  • 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

  • Effect of Backfill Thrust on Vertical Pressure Distribution in Reinforced Soil Model Walls

    The magnitude and distribution of vertical stress are required for the design of reinforced soil wall. A laboratory investigation utilizing a physical model of reinforced soil wall was performed to determine the effect of backfill thrust on the vertical pressure distribution within the reinforced zone. Results obtained were compared with those predicted by the theoretical vertical pressure ...


    By ASTM International

  • Laboratory Investigation of Earth Walls Simultaneously Reinforced by Strips and Random Reinforcement

    The performance of reinforced earth structures depends, among other factors, on the shear strength of the backfill material used in construction. The shear strength can be enhanced by the use of random reinforcement. This paper presents the result of laboratory investigations concerning the effects of several types of random reinforcement on soil strength and, in particular, on the performance of ...


    By ASTM International

  • Reinforced track sub-ballast overview

    THE Geoweb® SOIL STABILIZATION system The Geoweb system is a proven technology for solving challenging soil stabilization problems common in the railroad industry. Railway engineers worldwide have successfully applied the Geoweb cellular confinement technology to 1) provide a high-stiffness roadbed foundation at grade under track, crossings and turnouts, particularly in areas of weak soils, 2) ...


    By Presto Geosystems

  • Testing of Geotechnical Fabric for Use as Reinforcement

    Twenty-seven commercially available petrochemical-based geotechnical fabrics, both woven and nonwoven, and one fiberglass fabric were evaluated for suitability as reinforcement in an embankment test section to be constructed on soft foundation at Pinto Pass in Mobile Harbor, Ala. by the U.S. Army Corps of Engineers Mobile District. All fabrics were subjected to initial testing in uniaxial tension ...


    By ASTM International

  • Transition from Maximum Tension Line to Actual Failure Surface in Reinforced Soil Model Walls

    This paper presents the results of laboratory tests conducted on reinforced soil model walls. The effect of model height on distribution of tensile stress in an instrumented reinforcement strip was investigated. It was found that, with increasing height of wall, a continuous redistribution of tensile stress had occurred with the point of maximum tension moving towards the actual failure surface ...


    By ASTM International

  • Wilshire Boulevard base reinforcement, Los Angeles, California

    A City of Los Angeles street beautification effort for world famous Wilshire Boulevard provides a classic case study regarding the incompatibility of rigid pavements placed on top of rigid base layers. Wilshire Boulevard is constructed across areas of clay subgrade soils of very poor bearing strength. Soft subgrade conditions are a year around problem as the soils have a high affinity for water. ...


    By Presto Geosystems

  • Tickville Gulch Turf Reinforcement Mats - Case Study

    The Vmax SC250 Turf Reinforcement Mat provides a revegetation option able to withstand FEMA-set high flow rates A drainage canal serving several farms and registered as a U.S. Waterway needed to be redirected to accommodate new development. Federal regulations and soft soils throughout the project area required special considerations for the channel lining and material anchoring. ...


    By Nilex

  • Measuring Inherent Load-Extension Properties of Geotextiles for Design of Reinforced Structures

    Existing test methods for measuring the load-extension properties, including the stiffness and the ultimate strength, of geotextiles as they are subjected to confining pressures are reviewed and critically evaluated. In addition, a new test method which surmounts the drawbacks of the existing methods is presented. The new method has three distinct characteristics: (1) it is an “element” test, ...


    By ASTM International

  • Laboratory Properties of a Soft Marine Clay Reinforced with Woven and Nonwoven Geotextiles

    This paper is concerned with the laboratory properties of a geotextile-reinforced compacted soft marine deposit with respect to its compaction, compressive strength, and time-dependent settlement characteristics. Two different geotextiles, namely, Polyfelt TS-500 (nonwoven) and Cardon SG PP 150 (woven) have been investigated. It was observed from the experimental study that a nonwoven geotextile ...


    By ASTM International

  • 3-D Woven Technology: The “Next Generation” in Turf Reinforcement Mats

    The designers at Propex have taken the technology in their high performance turf reinforcement mats (HPTRMs) and used it to design the next generation of turf reinforcement mats (TRMs). These new netless, composite-free three-dimensional woven TRMs are designed to deliver superior, long-term performance, and are proven to outperform traditional methods like rock riprap, concrete paving and first ...

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