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,” summarizing the key contents of his Koerner lecture and emphasizing the important point: Improving practice with better theory. This is the first time Geosynthetics magazine has published the principal content of a Koerner lecture.
This issue also includes an article by Brian Fraser and Mike Neal, an interesting case study on geosynthetic cofferdams entitled “Geosynthetic Portable Cofferdams for Civil Construction Applications.” As the authors note, “Portable geosynthetic cofferdams are typically lighter-weight modular systems produced from geomembrane and geotextile fabrics. They limit the impact of construction-generated silt and sedimentation when excavating in submerged or dredging areas, which lessens the environmental impact. Most systems are also modular in design, allowing for bends and turns in the project waterway.”
And our third feature takes us to the Russian Federation for “Construction of Roads in Underground Mines with 3D Geocells,” a case study by A. Goncharov, A. Kolesnikov and A. Korotkevich. The authors did testing using yellow-colored geocells (for underground visibility) with a specially designed fastening key that can quickly connect the geocell sections. As the authors note, “The specialists of Russia-based geosynthetics manufacturer PRESTORUS LLC found a solution to this problem and developed a new generation of 3D geocells. The patented production technology includes the use of ultra-strong reinforcing threads in the polyethylene tape, which prevents plastic deformation of the cells. Thanks to the reinforcement of the tape, these geocells are stronger and more reliable than standard 3D geocells. Thus, the reinforced geocell does not stretch under constant loads and elevated temperatures, and it maintains its geometric dimensions and shape—particularly useful in underground mining roads, which are often subject to rapid destruction of the structure due to mechanical loads from heavy equipment.”
And this issue also announces GeoNashville, to be held in Tennessee, Nov. 4–5, 2021. The all-plenary event will be the first in-person U.S. geosynthetics conference since the pandemic began. Read about it in both the Geosynthetics Conference Watch and the GMA News columns.