Showing results for: soil reinforcement Articles
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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 ...
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Sustainable development: the options
Global warming is considered in the context of options for achieving sustainable development. There is some uncertainty over global warming processes, so the Climate Change Convention struck the right balance. The Earth Summit reinforced the concept that economic development and environmental management are interdependent, and resources to solve environmental problems must be targeted carefully. ...
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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 ...
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Modelling concrete slab on rigid inclusion reinforced soil - Case Study
Project Description In the context of a wine cellar extension project, a 20cm thick concrete slab is to be constructed on a soil reinforced by rigid inclusions. Itasca France has been called by the design office to verify the mechanical resistance of the concrete slab and assess its settlement under a uniform load. The inclusions will be installed in a regular pattern. A 2D FLAC axisymmetric ...
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Fibermesh 650 Macropolymeric Fibers Replace Rebar for Crestline Library Project in Crestline, CA Case Study
STK Architecture designed a beautiful public library, built to LEED Silver Standard for the town of Crestline, California. The parking lot paving and walkways utilized Fibermesh 650 high strength macropolymeric fibers instead of rebar to save money, improve durability and increase crack resistance. High strength macropolymeric fiber reinforcement for soil supported slabs was adopted into ACI 360 ...
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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 ...
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Centrifuge Modeling: A Study of Similarity
Data are presented of geotechnical centrifuge models of reinforced soil retaining walls in which the effects on wall behavior of differences between prototype and model, boundary effects, stress paths, instrumentation, and model repeatability are ...
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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 2001 ...
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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 feet in ...
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LOCK+LOAD Highland Valley Copper Mine, BC
Owner: Teck Highland Valley Copper Partnership Engineers: Sade Engineering Associates Limited / Terratech Consulting Limited Contractors: Newport Structures Limited / TLC Stoneworks Limited Details: Winter construction on a 24 / 7 schedule to avoid frozen backfill. Temperatures as low as -25C. Lock + Load was ideal for “wrapping around” the curved Bridge-Plate arch, as it could be ...
By Armtec
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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 ...
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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 ...
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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. ...
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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, ...
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New lakes in Czech Republic with TenCate geosynthetics case study
The landscape in the northwest of the Czech Republic is undergoing large-scale revitalization. Where once brown coal was extracted from open-cast mines, recreational facilities are now being built and seven lakes created. TenCate Geosynthetics is involved in their installation, providing geotextile materials and technical support. The realization of Lake Medard at Sokolov is presently in ...
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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 ...
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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 ...
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Tunneling in Mixed Face Conditions - Case Study
Project Description A research project on tunneling in mixed face conditions (rock-soil) was carried out with the aim to increase the knowledge and to better understand deformation mechanisms when these particular conditions arise. A back analysis of a case study involving the tunnel passage under the Maria Magdalena church was performed as a second task of the project, in which soil ...
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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 ...
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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 ...
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