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Three challenges in using SRWs and other reinforced-soil structures: Part 3B

August 1, 2008

By Michael R. Simac, P. E., and Blaise J. Fitzpatrick, P. E. Introduction While segmental retaining walls (SRWs) have been routinely used for more than 15 years now, there are still three challenging issues facing owners considering their use. What is the best way to procure, design, and then build these structures to minimize short-term …

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Case history: “Intelligent” geosynthetics

June 1, 2008

Reinforcement and deformation monitoring of a railway embankment in France Compiled and edited by Ron Bygness Introduction This project was the first practical realization of the RAFAEL research project for the use of high-strength geosynthetics for base courses over cavities, including the first “intelligent” geosynthetic. This product combines the benefits of a high-strength geocomposite with …

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Geogrid slope reinforcement, track refurbishing for German rail lines

Compiled and edited by Ron Bygness Hallstadt rail crossing An existing railroad crossing in the Hallstadt section of railroad track 5100, from Bamberg to Hof (Saale), had to remain open for rail traffic, but had to be replaced by an underpass for the street. An underpass for Michelin Street, under the railroad tracks, had to …

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Three challenges in using SRWs and other reinforced-soil structures: Part 3A

By Michael R. Simac, P. E., and Blaise J. Fitzpatrick, P. E. Introduction While segmental retaining walls (SRWs) have been routinely used for more than 15 years now, there are still three challenging issues facing owners considering their use. What is the best way to procure, design, and then build these structures to minimize short-term …

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Geosynthetic-reinforced levees performed well

Editor’s note: In the wake of ongoing public debate that continues to evaluate the construction designs of New Orleans area levees, the Geosynthetic Materials Association (GMA) recently offered the following statement. Geosynthetic-reinforced levees challenged by Hurricane Katrina performed exceptionally well, the U.S. Army Corp of Engineers has reiterated. The St. Charles and Jefferson levees are …

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Repairing Yi-Lan-I Road in Taiwan

April 1, 2008

By Vincent Ho and Steven Chang Introduction Stretches of the Yi-Lan-I Road in Taiwan are located more than 3,200ft (1,000m) above sea level. It’s an important road that provides the primary access to the National Taipingshan Forest Recreation Area. But during a particularly rainy 75-day period (mid-July through September 2005), the region experienced abundant rainfall …

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Three challenges in using SRWs and other reinforced-soil structures: Part 2B

By Michael R. Simac, P. E., and Blaise J. Fitzpatrick, P. E. Introduction While segmental retaining walls (SRWs) have been routinely used for more than 15 years now, there are still three challenging issues facing owners considering their use. What is the best way to procure, design, and then build these structures to minimize short-term …

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ML Ingenieria S.A. de C.V. wins 2007 Outstanding Achievement Award

February 1, 2008

The award is part of the 2007 International Achievement Awards presented by the Industrial Fabrics Association International (IFAI). Project description This project underscored the advantages of using geogrids to build many of the biggest retaining walls ever constructed in Chilpancingo, the capital city of the state of Guerrero, México. Retaining walls were designed to support …

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Coastal dune stabilization using geotextile tubes at Las Coloradas

By Sergio Aguilar Escalante and Alfonso Sol“s Pimentel Abstract Beaches and coastal dunes at Las Coloradas, Mexico, were severely affected after Hurricane Wilma stormed through the northern coast of the Yucatan Peninsula in October 2005. Dune destruction connected open sea with lagoon systems at some points, with disastrous consequences for the local ecosystems. The regional …

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Three challenges in using SRWs and other reinforced-soil structures: Part 2A

By Michael R. Simac, P. E., and Blaise J. Fitzpatrick, P. E. Introduction While segmental retaining walls (SRWs) have been routinely used for more than 15 years now, there are still three challenging issues facing owners considering their use. What is the best way to procure, design, and then build these structures to minimize short-term …