GWFV walls and slopes

October 1, 2017

New patented technology is available to construct geosynthetic wrap-face vegetated (GWFV) retaining walls and reinforced soil slopes using a pyramidal-woven, high-performance turf reinforcement mat (HPTRM) in conjunction with fiber-composite internal braces. This wrap-face system eliminates the need for temporary external bracing (formwork) or for facing elements comprised of metallic wire-frame units, which traditionally have served …

Final inspection: Civil penalties against polluters drop 60% under Trump

An Aug. 10, 2017, report issued by the Environmental Integrity Project (EIP), indicates that, so far, President Donald J. Trump’s Environmental Protection Agency (EPA) has collected 60% less in civil penalties than previous administrations had recovered from environmental violators on average by the end of July in their first year after taking office. The EIP …

Panorama: IFAI IAA Awards

The Industrial Fabrics Association International (IFAI) International Achievement Awards (IAA) are an annual competition promoting awareness of the specialty fabrics used in thousands of products and applications ranging in size and shape. For more than 70 years, the awards have recognized innovation, technical skill and design excellence. Entries are judged by industry experts, editors, architects, …

Part 1: Controlling uplifting gas bubbles in exposed geomembrane-lined ponds

There is a substantial legacy of literature devoted to the design, construction and operation of geomembrane-lined ponds, with perhaps the best and most complete reference being 34 years old by Giroud (1983). Even with this long history, there continue to be problems and failures with lined ponds. One of the problems continuing to plague the …

The durability of exposed geomembrane covers

The most frequently asked question by people in the geosynthetics world is how long is the anticipated lifetime of geosynthetics. So much so that of the more than 3,000 questions submitted to the GMA Techline since it began in 2004, 591 (19.7%) have been on lifetime, aka durability. Of these, 49% were on buried lifetime, …

Editorial: Geosynthetics for multiple applications

If you are reading this publication, you obviously have an interest in geosynthetics, as this magazine is unlikely to appeal to people whose primary professional interests are taxidermy, snow-crystal study or calligraphy. We aim to please, and this issue touches on many types of geosynthetics, from geogrids to geomembranes, and many applications of geosynthetics, from …

Panorama: ASTM D35.06 on Geosynthetic Specs takes shape

At the January 2017 meeting of the ASTM International Committee D35 on Geosynthetics in Norfolk, Va., the executive subcommittee approved the formation of a new subcommittee D35.06 on Geosynthetic Specifications with L. David Suits as chair. The scope of D35.06 is to implement the scope of Committee D35 with a focus on the development of …

Geosynthetics Conference 2019

The Industrial Fabrics Association International (IFAI) will host Geosynthetics (GEO) 2019 at the Marriott Marquis in Houston, Texas, Feb. 10–13, 2019. More than 1,000 attendees, exhibitors, speakers, instructors and sponsors will attend the biennial conference’s plenary lectures, short courses, technical sessions, panel discussions and welcome reception, taking advantage of the exceptional educational and networking opportunities …

In the classroom: Part 4: Geosynthetics education through the FHWA/NHI

There is a twofold purpose for a geosynthetics education program. First, it must offer training to engineers who were not exposed to the subject during college. Second, it must provide a refresher and continuing education for those who have previously taken courses in the subject area.     The continuing education courses on geosynthetics offered …

GMA Techline

Welding HDPE to PVC and more Q: I would appreciate any input you have on these questions: Can a high-density polyethylene (HDPE) geomembrane (GM) be welded to a PVC geomembrane? I am looking to connect a geomembrane to a building foundation. Based on some research, I have found the following options: bolt the geomembrane to …