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

June 1, 2008  |  Case Studies

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 …
Read More
Geogrid slope reinforcement, track refurbishing for German rail lines

June 1, 2008  |  Case Studies

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 t…
Read More
Case history: “Intelligent” geosynthetics

June 1, 2008  |  Case Studies

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 &l…
Read More
Active LFG control: An unreliable aid to veneer stability

June 1, 2008  |  Features

By Gregory N. Richardson, Stacey A. Smith, and Pieter K. Scheer Abstract The potential for sliding failure of final covers and piggyback liners in municipal solid waste (MSW) landfills equipped with active landfill gas (LFG) control systems is demonstrated and the need for a contingency passive vent…
Read More
Transmissivity article unnecessarily confusing

June 1, 2008  |  News

In response to Rich Lacey’s article in the February/March 2008 issue of Geosynthetics (“Transmissivity: An ambiguous contradiction,” pp. 26–31), everything he says is correct, but I find the explanation more complicated and confusing than it needs to be for a design practitio…
Read More
GeoAmericas 2008: Show wrap-up

April 1, 2008  |  News

Doing business at GeoAmericas-2008: An energetic business hall. Good to see old friends, fun to meet new friends. First-rate, well-attended technical session and keynotes. Fiesta, fiesta, fiesta
Read More
Taking issue with recommendations

April 1, 2008  |  News

The “Kam Kotia Project Case Study” in the February/March 2008 issue of Geosynthetics magazine starts off with interesting descriptions of the project design, geosynthetic testing, and construction. However, the summary and recommendations section provides misleading statements. The autho…
Read More
Request-for-Proposals

April 1, 2008  |  News

The Geosynthetic Institute (GSI) is delighted to announce a worldwide call for requests-for-proposals (RFPs) focusing on innovative geosynthetics research and development projects. There will be multiple awards made, each for $10,000 per year, and they are renewable, pending an annual written report…
Read More
Review and analysis of GRI-21 Conference

April 1, 2008  |  News

Our 21st annual GRI conference went off without a hitch in Cancún, Mexico on March 5, 2008. The morning session was devoted to geosynthetics in agriculture applications and had seven presentations. Use of geosynthetics in agricultural activities in Taiwan are impressive. The use of large bags…
Read More
Geomembrane sealant to concrete pad

April 1, 2008  |  Products

From the GMA Techline Subject: Geomembrane sealant to concrete pad— This inquiry is about how to anchor geomembrane to a concrete pad, as well as rendering a perfect seal between the two to prevent water from seeping in between the concrete and the geomembrane. (Schar, London) Reply: Geomembra…
Read More