A special issue of Geosynthetics magazine

August 1, 2021  |  Editorial

In this special issue of Geosynthetics magazine, Jie Han, Ph.D., P.E., F.ASCE, of the University of Kansas, the 2021 Dr. Robert M. Koerner Lecturer and Awardee, has written a fascinating article, “Geosynthetic-Reinforced Column-Supported Embankments: Improving Practice with Better Theory,” summa…
Design of a CCR composite liner system

August 1, 2021  |  Q&A: GMA Techline

Q: We are designing a composite liner system for a coal ash landfill. From the bottom-up, the cross section is subgrade soil, geosynthetic clay liner (GCL), geomembrane, composite drainage layer with nonwoven geotextiles on both sides and then ash from coal combustion residuals (CCR). Do you have an…
A geotextile filter for an edge drain

August 1, 2021  |  Q&A: GMA Techline

Q: I am doing a geotextile filter design for a highway edge drain. All I have from the site is a grain size analysis of the sandy subgrade soil. Can you point me in the right direction?
Bluff repair in seismically active zone

August 1, 2021  |  Q&A: GMA Techline

Q: I am doing a bluff repair on the West Coast in a seismically active zone. Can you direct me to where I can get some design guidance?
Service life of nonwovens

August 1, 2021  |  Q&A: GMA Techline

Q: Where can I find literature on the useful service life of nonwoven geosynthetic fabrics installed in soils?
Metal leaching from geosynthetics

August 1, 2021  |  Q&A: GMA Techline

Q: Geosynthetics are made from polymers that use metal-based catalysts in their formulations. Do geosynthetics have the potential to leach metals into the environment?
Bringing geomembranes into equilibrium with atmosphere

August 1, 2021  |  Q&A: GMA Techline

Q: Some ASTM test methods request that one brings the specimens into equilibrium with the atmosphere prior to the test (some of them determine the conditions: 21±2ºC and 60±10% relative humidity). Considering that we just produce polyethylene geomembranes, and they are not significantly affected …
Koerner Lecture: Geosynthetic-reinforced column-supported embankments: Improving practice with better theory

August 1, 2021  |  Feature

This article summarizes the third Dr. Robert M. Koerner Lecture given by the author at the 2021 Geosynthetics Virtual Conference.
Geosynthetic portable cofferdams for civil construction applications

August 1, 2021  |  Feature

Cofferdams are an enclosure built within or across a body of water to allow the enclosed area to be dewatered. This creates a dry working environment so construction can be carried out properly and safely. Typical cofferdams are welded-steel structures consisting of sheet piles, wales or cross brace…
All about GeoNashville and Geosynthetics Conference proceedings/video archive

August 1, 2021  |  Events

GeoNashville 2021, Nov. 4–5, at the Music City Center in Nashville, Tenn., is positioned as the first face-to-face geosynthetics event of 2021 in the U.S. With a theme of “Geotechnical Innovations, Renewed Connections,” GeoNashville will reunite industry friends and colleagues. This 1.5-day, a…