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 …

A geosynthetic wrap-face vegetated wall system

October 1, 2020

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 …

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

August 1, 2020

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 …

EPA finalizes revisions to the coal ash closure regulations, increases public access to information

July 30, 2020

On July 29, the U.S. Environmental Protection Agency (EPA) finalized several changes to the regulations for coal combustion residuals, known as CCR or coal ash, to implement the court’s vacatur of certain closure requirements as well as adding provisions that enhance the public’s access to information about the management of coal ash at electric utilities. …

High-strength geocell and geogrid hybrid reinforcement

June 1, 2020

Compressor station gravel pad on soft subgrade By Sanat Pokharel, Timothy Yii, Marc Breault and Meisam Norouzi Infrastructure development in natural resources rich Alberta, Canada, often encounters very soft ground conditions that pose several construction and sustainability challenges to transportation infrastructure, such as roads, rails and pipelines. As the conventional construction practices may not always …

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Geosynthetic strip MSE wall at Point Defiance Marina

April 1, 2020

By Paul C. Frankenberger and Robert Lozano  This article will focus on a geosynthetic strip mechanically stabilized earth (MSE) wall case study using discrete geosynthetic strips with large precast facing panels (Figure 1), an innovation of the original MSE invention. The system is the Highway Innovative Technology Evaluation Center/National Transportation Product Evaluation Program reviewed GeoMega …

U.S. Bank Stadium geosynthetic reinforced stress relief wall

February 1, 2020

Design, construction and fire damage mitigation By Nathan M. Lichty, Stephan M. Gale and Timothy P. Bendell Demolition of the Hubert H. Humphrey Metrodome stadium in Minneapolis, Minn., occurred in 2014 and subsequent construction of U.S. Bank Stadium (Figure 1), the home of the Minnesota Vikings and host of the 2018 Super Bowl, occurred between …