Overview of GSI’s surveys

February 1, 2007  |  GSI News

By Bob Koerner It appears to this writer that any forward looking decisions—business or otherwise—should be made on the basis of factual information from the past. My son sent an E-mail to me stating: “Without data, yours is just another opinion!” One step further in gathering this data is t…
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Junction-strength requirements for roadway design, construction

February 1, 2007  |  Products

By Barry R. Christopher Introduction Currently many engineers are confused about junction-strength requirements for geogrids used in roadway base reinforcement and subgrade stabilization applications, primarily because of commercialism of junction strength requirements. Some promotional efforts reco…
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Liner integrity/leak-location survey: The significance of boundary conditions

February 1, 2007  |  Features

By Ian D. Peggs Introduction A geoelectric integrity survey was requested on a new landfill cell with the following lining system from the top down: 18 in. sand Geotextile/geonet/geotextile composite (geocomposite) Primary geomembrane Geosynthetic clay liner (GCL) Geomembrane (rub sheet) Geocomposit…
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Massive mining evaporation ponds constructed in Chilean desert

February 1, 2007  |  Case Studies

The Salar de Atacama in Chile is the site of the largest PVC geomembrane installation in the world—more than 16 million m2 utilized in mining operations since 1996. By Dominic Berube,1 Patrick Diebel,2 Andre Rollin,3 and Timothy D. Stark4 The largest PVC geomembrane installation in the world i…
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Five-year CalTrans freeway project is nearing completion in San Diego

February 1, 2007  |  Case Studies

From the 2006 International Achievement Awards for Geosynthetic Projects Introduction In an effort to reduce traffic congestion and improve safety conditions in northern San Diego, the California Department of Transportation (CalTrans) is adding lanes and creating a truck bypass at the Interstate 5/…
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Using structured geomembranes in final solid-waste landfill closure designs

February 1, 2007  |  Products

By Ronald K. Frobel, MSCE, P.E. Introduction Slope failures on final cover systems for solid-waste landfills have been well-documented during the past 20 years with many failures of note within the past three years. Sliding failures have occurred despite known geotechnical reasons for failures and k…
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Horses and the land: Geosynthetics help to improve riding trails

February 1, 2007  |  Case Studies

Professor worries animal that helped tame America labelled as enviro outcast. By Tom Lollis Clemson University professor Gene Wood has two great passions—horses and the land. He hopes the two are never separated because of a dispute over natural resources. “The horse is burned into the A…
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Thanks and thanks again!

February 1, 2007  |  News

To the editor: I just read the October/November 2006 edition of Geosynthetics. Thanks for your coverage of the recent U.S. Army Corps of Engineers/Steve Stockton presentation to your Geosynthetic Materials Association Executive Council. Also, thanks for GMA’s support of the Water Resources Dev…
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Geosynthetics wins gold award

February 1, 2007  |  News

Geosynthetics magazine was recently cited with a Gold Award/Best Technical Article for the story and graphics in the June/July 2006 issue titled “Back to the beach in Mexico.” “Back to the beach in Mexico: Shoreline restored with geotextile tubes as submerged breakwaters” was…
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Arizona road

October 1, 2006  |  Products

From the GMA Techline Subject: Arizona road I am a design engineer working on a road construction project in Arizona. The existing road is to be rebuilt, with 6 inches of asphalt concrete (AC) over about 12 inches of existing base. The city is concerned with groundwater and has instructed us not to …
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