TRB webinar: Celebrating TRB’s centennial by exploring the future of transportation research

November 3, 2020

What is the future of transportation research and what is TRB’s role in that future? Learn from our panel of experts about how the scale and scope of TRB’s activities expanded steadily over the last 100 years, and what we might expect in the transportation field during the next 100 years. Join us on Thursday, …

Publishing opportunity: Geosynthetics experts invited to send case studies

November 2, 2020

Geosynthetics magazine is encouraging industry experts to submit innovative case studies and other news for publication consideration. Geosynthetics delivers technical information for engineers, specifiers, landscape architects, government agencies, academics and installers. This publishing opportunity is extended to geosynthetics experts who possess solutions and case study content that will help readers drive projects forward. The articles …

Ground improvements using geofoam: A case history

October 14, 2020

By Javaid M. Alvi, Ph.D., and Jahangir J. Kabir, Ph.D., P.E The project site is a triangular-shaped property located at the intersection of Raleigh Avenue and West Liberty Avenue in the Borough of Dormont, Allegheny County, Pa. (Figure 1). The site housed two Nissan buildings, one with a showroom at the top floor and the …

The GMA Techline

October 1, 2020

Moderated by George R. Koerner Puncture after NDT Q: I would like your opinion on the fate of punctures in the air channel leftover from nondestructive air channel tests (NDTs), specifically in regard to sealing the air channels to prevent leachate or water ingress. We are particularly concerned with this situation on a landfill cover …

A geosynthetic wrap-face vegetated wall system

For highway embankment construction  By Stanley M. Miller and Drew Loizeaux A recent creek enhancement project to facilitate the passage of bull trout in Pend Oreille County of northeastern Washington state required removal of a 6-foot (1.8-m) diameter concrete culvert (Figure 1), realignment of a well-traveled county road and a new 58-foot (17.7-m) span bridge. …

CCR landfill final cover test pad—Part 2

By Nina J. Balsamo, John Massey-Norton, John R. Klamut, Terry Queen,Charles F. Straley and Mark R. Lehner An integrated drainage system (IDS) geomembrane, which provides both a low-permeability membrane and drainage space above the geomembrane, is being used in the final cover at a coal combustion residuals (CCR) landfill in West Virginia. Part 1 of …

Reinforced embankments for the causeway for a North Wales bridge project

By Patricia Guerra-Escobar  The Pont Briwet Project in Penrhyndeudraeth, North Wales, U.K., consisted of the replacement of a historic timber trestle bridge with a new 446-foot (136-m) long concrete viaduct and the upgrade of the approach road to the north and south of the crossing (Figure 1). The site is set within the floodplain of …

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CCR landfill final cover test pad—Part 1

August 1, 2020

By Nina J. Balsamo, John Massey-Norton, John R. Klamut, Terry Queen,Charles F. Straley and Mark R. Lehner An integrated drainage system (IDS) geomembrane, which provides both a low-permeability membrane and drainage space above the geomembrane, is being used in the final cover at a coal combustion residuals (CCR) landfill in West Virginia. Part 1 of …

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Innovative geosynthetic solution saves 106-year-old Panama Canal structures

By Tom Stephens and Nicolas Ruiz The Panama Canal opened for business 106 years ago and was hailed as the eighth wonder of the world and an engineering marvel. It has become the most consequential global waterway ever constructed. Since 1914, more than a million ships of all sizes have passed through the canal’s original …

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PVC sheet piling for cutoff and containment barriers

By Brendan Sheppard and Steve Hargrave Polyvinyl chloride (PVC) sheet piling (Figure 1) has been used for more than 25 years in bulkheads throughout the United States and beyond as a replacement for steel, concrete and timber materials due to the high corrosion resistance it offers in marine environments. More recently, barrier walls have been …