Underground gardens

August 1, 2015

Efficient landscape engineering and effective geosynthetic materials built Maple Garden Park In Taichung City, Taiwan, city dwellers wandering through Maple Garden Park are actually meandering below ground level. In November 2012, landscape engineers working with the aid of geosynthetic products converted a large hole in the heart of the city into an urban park oasis. …

ASTM announces new geogrid standard

July 21, 2015

A new geogrid test method from the standards organization, ASTM International, has been issued, according to a July 20 ASTM press release. The release said that the test described in the standard—D7864/D7864M, Test Method for Determining the Aperture Stability Modulus of Geogrids—will help ensure that geogrids meet product specific calibrated and validated levels of aperture …

Geosynthetics stabilize deteriorating mine roads

August 1, 2014

Improvements in wave transmission reduction for beach restoration By Branden Reall Introduction The roads of a mine are the arteries through which all products (and by-products) pass. Throughout the day, metals and materials are recovered and large trucks make repetitive, usually slow, trips up and down mine haul roads. While mining companies understand how processes …

Colombia gold mine MSE project

By Chip Fuller Introduction A Canadian firm, Continental Gold Ltd., is a precious metals mining company and it currently operates the largest gold mine in Colombia, the Buriticá project. Mining products provide approximately 20% of Colombia’s exports and 2.5% of its GDP. The Buriticá project covers more than 13,500 hectacres (33,345 acres) and is located …

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Void bridging with specialty geosynthetics and thin covers

By Brian Baillie Introduction Geologic or hydraulically formed cavities and sensitive utility trenches are sometimes a concern on construction, mining, and environmental containment sites. Naturally formed or man-made openings such as these can complicate the design and performance of overriding structures or create restrictions with site access. They can also create significant safety issues for …

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The influence of soil type on interface behavior under pullout conditions

June 1, 2014

Part 3: European experience in pullout tests By Nicola Moraci, Daniele Cazzuffi, Lidia Sarah Calvarano, Giuseppe Cardile, Domenico Gioffrè, and Piergiorgio Recalcati 1. Introduction The rapid increasing application of geosynthetics as reinforcement elements for earth structures requires a careful examination of soil-reinforcement interaction mechanisms. The soil-geosynthetic interaction can be complex because it is affected by …

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NCMA’s Design Manual for Segmental Retaining Walls

February 1, 2014

Submittal requirements for polyester geogrid reinforcement By R. Lance Carter and Michael Bernardi Adopted by the NCMA Segmental Retaining Wall & Hardscape Products Committee Editor’s note Lance Carter and Michael Bernardi, although competitors, felt the need to remind geosynthetic users, specifiers, and designers that as manufacturers and marketers of polyester reinforcement products, they are held …

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Silt fence

GMA techline answers from Bob Koerner RE: Silt fence I have read M288 and understand the different levels of material specifications for highway applications. Is there another category that can be sold to the public that does not have to meet the specifications for highway applications? For example, a home gardening category that can be …

Tensar announces regional partnership with G&O

November 19, 2013

To increase geogrid availability and service in Mississippi In a Nov. 18 press release, Atlanta-based Tensar International announced an expanded partnership with G & O Supply Co. Inc. that will increase Tensar’s product accessibility and support service in Mississippi. The new partnership will allow for increased TriAx geogrid availability to local customers, especially along the …

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Performance, design, and redundancy

June 1, 2013

Geosynthetic reinforced walls in the public sector By Dov Leshchinsky and Fumio Tatsuoka Introduction Geosynthetic reinforced soil can be viewed as a subset area of slope stability. In slope stability analysis, the factor of safety signifies the margin of safety against failure. It physically means that its reciprocal value signifies the average mobilization or utilization …