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The benefits of GRS bridges
January 1st, 1970
By Jessica Bies Although GRS bridge technology is not suitable for every bridge building scenario, it can be a great option for replacing simple overpasses where severe flooding that could weaken a GRS structure is unlikely to occur. Here are some of the benefits of using GRS technology in appropriate settings. Bridges constructed with GRS […]
Report from Steven L. Stockton, Deputy Director of Civil Works, U.S. Army Corps of Engineers
January 1st, 1970
Steve Stockton began his presentation to the GMA Executive Council last summer by noting that the current U.S. infrastructure is aging and that there is a great need for rehabilitation of the infrastructure to prolong its lifespan, and also the need to construct new and stronger infrastructure. He said that the USACE is an advocate […]
Using expanded polystyrene (EPS) geofoam in road and bridge projects
January 1st, 1970
Problem: Highway capacity is insufficient to meet growing demand Traffic congestion on highways in the United States continues to be an area of concern to the traveling public, and to roadway managers. Every year, congestion continues to grow as vehicle travel increases and the nation’s bridges and roads deteriorate. To help alleviate this growing congestion, […]
Toronto’s example of green roofs
January 1st, 1970
In February 2006, the city government of Toronto, Ontario, approved “Making Green Roofs Happen,” a strategy that commits to installing green roofs on new and existing buildings. Among other recommendations, the policy calls for financial incentives for privately owned green roofs in the city. The goal is to reap significant energy, air-quality, and climate-changing benefits […]
Mattex names director of geosynthetics
January 1st, 1970
Mattex has named Philippe Grimmelprez the company’s director of geosynthetics. He is based in Dubai, UAE.
More historical notes from the early days of shear tests
January 1st, 1970
By J.P. Giroud To: Allan J. Breitenbach From: J.P. Giroud Copy to: Ron Bygness Subject: Comments on article about the history of geomembrane interface strength tests Geosynthetics Dear Allan, I read with great interest your article in the February-March issue of Geosynthetics on the history of geomembrane interface strength tests. Please accept my congratulations. I […]
Lake Tahoe bluff-restoration project recognized
January 1st, 1970
By James Chinchiolo The Tahoe Regional Planning Agency (TRPA) recognized recipients of the 2010 Best in the Basin Awards during its Feb. 23 meeting at the North Tahoe Event Center in Kings Beach, Calif. This project was recognized with a Best of the Basin award in the Residential Modification/Shorezone category. The 21st annual TRPA Best […]
A CSPE (Hypalon) primer
January 1st, 1970
By Steve Roades Chlorosulfonated polyethylene (CSPE) geomembranes have a history of providing long-term performance in exposed environments. These geosynthetic barriers are increasingly referred to generically as CSM, but many people still refer to them by the no-longer-produced Hypalon elastomer brand name. DuPont, which had manufactured the Hypalon elastomer formerly used in the lion’s share of […]
How do wick drains work?
January 1st, 1970
By Ron Bygness The term wick drain is a misnomer because these clever devices do not actually wick away water. Wick drains, perhaps more accurately called strip or prefabricated vertical drains (PVDs), accelerate preconstruction soil consolidation. The drains are composed of a plastic strip with drainage channels, wrapped in a nonwoven geotextile filter fabric (see […]
The influence of geogrid’s geometry and structure on interface behavior
January 1st, 1970
European experience in pullout tests By Daniele Cazzuffi, Lidia Sarah Calvarano, Giuseppe Cardile, Nicola Moraci, and Piergiorgio Recalcati 1. Introduction The use of geosynthetics to improve the soil mechanical response has become increasingly common practice in geotechnical engineering applications. Geosynthetic materials are commonly used in soil reinforced structures, in embankment toe reinforcements on compressible ground, […]