Geogrid reinforced soil structures reach new heights

June 1, 2019

By Sachin Mandavkar and Mehari Weldu Reinforced soil structures are geotechnical systems consisting of reinforcing elements and primarily include mechanically stabilized earth (MSE) walls and reinforced soil slopes (RSS) (Figure 1). MSE walls and RSS are constructed by placing alternating layers of reinforcement and compacted soil behind a facing element to form a composite material …

Thrace-LINQ completes expansion project

Thrace-LINQ Inc. announced the completion of the installation of a new ANDRITZ needlepunched nonwoven line. The Thrace Group invested more than $9 million in this project to satisfy the growing demand for its high-performance nonwoven fabrics in North America. This state-of-the-art needlepunched nonwoven line was designed to produce world-class quality fabrics for geosynthetics, automotive and …

GMA looks back and moves forward

by Jonathan Curry Over the past decade the Geosynthetic Materials Association (GMA) has grown by leaps and bounds, establishing itself as a leading geosynthetics organization in the areas of education, technical support and government relations. GMA’s membership has nearly doubled since 2005, GMA-supported educational conferences have attracted more than 25,000 attendees, and GMA’s lobbying efforts …

Roundtable focuses on geocomposite peel testing

On February 12 during the Geosynthetics Conference 2019 in Houston, Texas, a roundtable discussion was held regarding geocomposite peel testing and a potential new approach for testing of this index property. The session was moderated by Richard Thiel and included approximately 65 attendees. The lively discussion focused on the previously unrecognized high variability of the …

Plastatech unveils line of prefabricated geomembrane accessories

Plastatech Engineering Ltd. launched a new line of prefabricated accessories featuring product styles such as a straight pipe boot, angled pipe boot, inside corner, outside corner and other customizable options. Designed to provide time-saving solutions for a variety of geomembrane projects, accessories are available in polyvinyl chloride (PVC), high-density polyethylene (HDPE), reinforced polyethylene (RPE), linear …

The GMA Techline

Who is doing the testing? Q: This question relates to the number of rolls to be selected as the lot sample for specification conformance testing and refers to ASTM D4354. When I look at this standard, it appears the values in Table 1 of GRI’s White Paper #10 refer to the number of units to …

Geosynthetics for reinforcement and stabilization

Geosynthetics are widely used for reinforcement and stabilization, particularly in transportation-related applications, including base stabilization, reinforced soil slopes (RSS) and mechanically stabilized earth (MSE) walls. This issue of Geosynthetics considers many such applications from multiple viewpoints. Sachin Mandavkar and Mehari Weldu look at very tall MSE walls and RSS through several case studies in “Geogrid …

Geosynthetics Conference watch: A special edition of the Geosynthetics Conference

This special edition of the Geosynthetics Conference will feature in-depth case studies spanning the geotechnical industry. Each 30-minute case study presentation will explore a geotechnical project from design to installation. Presenters will highlight the challenges encountered, how they were overcome and the current status of the completed project. All case studies will include a geosynthetic …

Streambank restoration using engineered bank stabilization

By Jeffery T. Hoilman and Stanley M. Miller Mountain Creek flows through the community of Red Bank near Chattanooga, Tenn., to the Tennessee River. Mountain Creek has been identified by the Tennessee Department of Environment and Conservation (TDEC 2018) as a 303(d)-listed stream, meaning that its pollution exceeds the state’s standards for one or more …

McCartney letter and IGS-NA happenings

By John McCartney I am excited to start my two-year term as the president of IGS North America. I am joined by an active and engaged set of board members, including John Allen (president-elect), Ranjiv Gupta (treasurer), Ben Leshchinsky (secretary and vice president), Kate Patterson (vice president), Bruno Herlin (vice president), Tim Stark (vice president), John …