Renovating the Zhongsha Bridge

February 1, 2016

Award of Excellence Ace Geosynthetics Introduction The object of this renovation project is the Zhongsha Bridge located on the Zhuoshui River in west-central Taiwan. The 2,345m-long bridge spans the Zhuoshui on the border between Changhua and Yunlin counties. The bridge was built in 1978 with prestressed hollow core piles and prestressed beams. It is part …

Members Only  

Lach Huyen Bridge work platforms

Outstanding Achievement Award TenCate Geosynthetics Introduction More than 27km of geotextile tubes were installed to reclaim the 4.1km × 26m work platforms to construct the 600,000m³ dredged sediment containment facility for construction of Lach Huyen Bridge in Vietnam. The in-progress 5.44km (almost 3.5 miles) bridge, which accommodates a four-lane highway, spans across the combined estuary …

Members Only  

Using geosynthetic materials to effectively close a coal ash pond

October 1, 2015

Introduction Many electric utilities are required by the U.S. Environmetal Protection Agency’s (EPA) recently published Disposal of Coal Combustion Residuals from Electric Utilities Rule to evaluate and address closure options for historical coal ash storage areas. EPA Administrator Gina McCarthy signed the final rule Dec. 19, 2014, and it was published in the Federal Register …

Members Only  

GRS-IBS Makes Quick Work of Bridge Replacement

September 9, 2015

When flooding forced the closure of the Jessup Mill Road Bridge over Edward’s Run in Mantua Township, New Jersey, county officials turned to a quick but effective solution to reopen the vital community link: geosynthetic reinforced soil–integrated bridge system technology. “We had observed the use of innovative bridge construction methods in other states that reduce …

Members Only  

‘Subtitle C’ mixed waste embankment cover system

August 1, 2015

Introduction This case history focuses on the construction of a crucial thin rock layer over geosynthetics and the solution encountered during the first construction phase of an RCRA Subtitle C embankment cover system at a hazardous and radioactive disposal site. The top and 5:1 sideslopes of the cover system were constructed with a cap consisting …

Members Only  

Part 1 Durability of geosynthetics: The basics

By John H. Greenwood Author’s note This article is based on a training presentation delivered on Sept. 24, 2014, at the 10th International Conference on Geosynthetics in Berlin, Germany. That talk was itself based on courses given at ERA Technology, Leatherhead, U.K., with Alan Friday, and later at SKZ in Würzburg, Germany, with the participation …

Members Only  

Instrumented MSE wall reinforced with polyester straps

Emerging technology Introduction Mechanically stabilized earth (MSE) walls with large concrete panel facing, reinforced with polyester straps, is an emerging technology in the U.S. To enable the design of this wall system using AASHTO’s methodology, its classification of extensibility must be established. This empirical classification results in adequate internal stability. Internal design of MSE walls …

Members Only  

Geosynthetics & Landfills 101

June 1, 2015

Erosion control challenges at solid waste facilities By Eric S. Steinhauser Introduction Landfills, particularly municipal solid waste (MSW) landfills, are often misunderstood. Commonly referred to as “dumps,” these highly engineered facilities, and the engineering project teams involved in their development, do not get the respect they deserve. Once the primary option for MSW disposal, the …

Members Only  

Vegetation establishment is crucial for mine reclamation

By Jill Pack Project Highlights Mine closure and reclamation Chestnut Ridge Sand Quarry Kunkletown, Pa. Applications Erosion control Slope stabilization Contractor The H & K Group Distributor/Installer Jobsite Products Hydraulic erosion control HydraCM Steep Slope Matrix HydraCX Extreme Slope Matrix Quantities 3,414 bales of HydraCX (about 49 acres) 220 bales of HydraCM (about 3 acres) …

Members Only  

Geosynthetic opportunities in shale gas fracking (revisited)

April 1, 2015

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 …