Design of reinforcement geosynthetics in landfill piggyback expansion

June 1, 2021  |  Case Studies, Feature

An operator at a nonhazardous waste storage facility proposed extending the facility’s life, within the existing perimeter, by vertically expanding the cells in operation to a maximum thickness of waste of 52.5 feet (16 m). This project is based on nonhazardous waste storage cells 49.2-feet (15-m)…
NPA geocell for railway line repair in permafrost region

June 1, 2021  |  Case Studies, Feature

Churchill is a port city located on Hudson Bay in northern Manitoba, Canada. The nearest roadhead village of Gillam is 156 miles (252 km) south. Hudson Bay Railway (HBR), the only mode of land transport to Churchill, was completed in 1929. This single-line railway track has served the northern port …
Useful service life of nonwoven geosynthetics

June 1, 2021  |  Q&A: GMA Techline

Q: Where can I find literature on the useful service life of nonwoven geosynthetic fabrics installed in soils? Thank you.
GCLs in cold temperatures

June 1, 2021  |  Q&A: GMA Techline

Q: I am working on supporting a guide (independent) on what to consider when geosynthetic clay liners (GCLs) are installed in minus temperature regions (e.g., –4˚F [–20˚C]). There is not much published on this, especially independently.
Industry standard for wall drainage systems?

June 1, 2021  |  Q&A: GMA Techline

Q: I just watched your recorded video of mechanically stabilized earth (MSE) wall inspection. Thank you for the presentation; it was very informative. I do have a follow-up question for you. I was recently the site engineer for a precast panel MSE wall and now have the opportunity to inspect constru…
Geotextile under articulated systems in slope armoring

June 1, 2021  |  Q&A: GMA Techline

Q: I have a question about the geotextile placed under articulated systems in slope armoring. Based on my understanding, a drainage layer is recommended between the geotextile and the armoring structure, but, since the armoring structure has some spaces in between the armoring blocks, won’t the pa…
OIT for UV and oven aging

June 1, 2021  |  Q&A: GMA Techline

Q: I am contacting you in regard to the requirements for oxidative induction time (OIT) (standard [STD] and high pressure [HP]) in the GRI-GM13 specification for both ultraviolet light and oven aging. Do you need to conduct both OIT tests or just one or the other?
GMA honors Jie Han with Dr. Robert M. Koerner Award and Lecture Series

June 1, 2021  |  News

The Geosynthetic Materials Association (GMA), led by a Koerner awardee selection task force, selected Jie Han, Ph.D., P.E., F.ASCE, as the recipient of the 2021–23 Dr. Robert M. Koerner Award and Lecture Series. The award and lecture series is named for the late Robert M. Koerner, Ph.D., the found…
Geosynthetics in action

June 1, 2021  |  Editorial

This issue of Geosynthetics magazine will focus on three distinct applications of geosynthetics. As the first feature, “NPA Geocell for a Railway Line Repair in a Permafrost Region,” describes, it took more than two years to come up with a workable, economical solution for repairs to the deterio…
USACE Fiscal 2022 Civil Works budget press conference June 28

May 26, 2021  |  News

The United States Army Corps of Engineers’ (USACE’s) press conference to release details of President Joseph R. Biden’s Fiscal 2022 Budget for the Army’s Civil Works program is scheduled for Friday, May 28, from 2 p.m. to 3 p.m. EDT. The press conference will be broadcast virtually from the …