Geosynthetics facilitate construction of 10,000-ton tunnel in two weeks

April 1, 2015

Construction of the new Nowolazurowa Street tunnel in western Warsaw, Poland. By Jakub Bryk Introduction Nowolazurowa is a new road in the western part of Warsaw, Poland, built to connect burgeoning suburbs with the highway ring road S8. It was designed as a two-roadway, dual-lane artery with sidewalks and bicycle lanes. The section described in …

Geosynthetic opportunities in shale gas fracking (revisited)

By Robert M. Koerner, George R. Koerner, and Archie Filshill Introduction Energy is clearly the driver of almost every activity that the world and its inhabitants rely on and fully utilize. At issue is “what type of energy?” and the answer (as if there even exists a single answer) is largely geographically dependent. Currently, the …

Rail project required separation, filtration, reinforcement

February 1, 2015

Introduction The Canadian National Railway (CN Rail) wanted to build an additional six-track extension at its Transcona Yards in Winnipeg, Manitoba. Heavy railcars were expected to pass over this extension area and CN Rail was looking for an economical, efficient, environmentally friendly, and technically sound solution for its track extension. Challenges The construction site had …

Geofoam SIPs: Thinking outside the (stick-framed) box

October 1, 2014

Introduction In this decade of emerging technologies that seek to decrease carbon footprints, structural insulated panels (SIPs) have come of age. More architects and builders are thinking outside the box when designing with SIPs-creating beautiful buildings that approach net zero energy use and offering some surprising extras-while incorporating aesthetically pleasing design elements. SIPs have been …

Polymeric marine mattresses

Case studies highlight marine mattress applications By Jeff Fiske Introduction Marine mattresses are rock-filled containers constructed with advanced UV-stabilized co-polymer geogrid materials. Geogrid panels are laced together to form mattress-shaped baskets that are filled with small stones similar to the construction of gabions. Generally they are filled off-site and installed by lifting into place (Figure …

Steep geosynthetic-reinforced slopes stabilize access routes for construction of 27-km tunnel

June 1, 2014

Semmering Base Tunnel project in Austria By Sören Schmidt Introduction Following two years of preparatory work, main construction began on Austria’s 27-km Semmering Base Tunnel in January 2014. The tunnel between Mürzzuschlag and Gloggnitz on the Vienna–Villach/Graz main line is divided into three contract sections. The 13km central section is currently under construction, and two …

Safe enough to drink

May 14, 2014

A new geomembrane cover for an old water reservoir provides a long-term solution. By Jack Sine Introduction Last November, Newport Beach, Calif., completed a major water reservoir renovation project that it expects will solve the city’s decades-long water quality issues. The 22-acre Big Canyon Reservoir was originally constructed in 1958, with the plan that it …

Building better bridges with geosynthetics

May 2, 2014

By Scott Gordon As the road leading up to a bridge presses down on the soil beneath its surface, the bridge tends to remain higher than the roadway, creating a problem that has menaced drivers and road engineers for years. “It’s called the bump at the end of the bridge,” says University of Wisconsin Associate …

Montana DOT rebuilds an old bridge with a new system

April 1, 2014

Using geosynthetic reinforced soil, this two-lane project was completed faster with lower costs By Craig Abernathy Objective The structure built at the South Fork Dry Fork Marias River crossing was selected for a new technology tested in other states and was proven to work. The new bridge—also designed as a grizzly bear undercrossing—was built with …

Geosynthetics in new transportation applications

Geosynthetic materials can decrease project costs and time while improving performance and stability. By Timothy D. Stark and David Paiko Introduction Geosynthetics are useful and versatile materials that have found a range of applications in transportation projects (Berg and Suits, 2000). Geosynthetic materials can decrease project costs and project time; increase design life, stability, and …