Welding help for the Guangzhou Metro

October 7, 2009  |  Case Studies

A major urban rail project in southeast China uses new welders to get the job done on time. By Christophe von Arx Introduction Guangzhou, previously known as Canton, is a thriving city in the southeast of China with an estimated population of more than 10 million, with an estimated 15 million living…
Erosion control work at Pali Tunnel in Hawaii

October 7, 2009  |  Case Studies

Geotextile reinforcement is part of an effort to stabilize a slope at the Pali Tunnel on the island of Oahu. More than 10 tons of mud and debris slid onto the highway there in 2006, closing it for days before the area was cleared and deemed safe. The $700,000 Pali Slope Stabilization Project began i…
Geomembrane Technologies participates in United Nations climate change project

September 2, 2009  |  Case Studies

Geomembrane Technologies Inc. (GTI) has participated in a project that qualified for the carbon credit market under the United Nations Framework Convention on Climate Change (UNFCCC). Environmental benefits of the project include: reduction in Green House Gas (GHG) emissions. conservation of groundw…
Geotextile tubes help stabilize shorelines

September 1, 2009  |  Case Studies

Geosynthetic technologies have emerged as a major tool in the battle against shoreline erosion, and TenCate Geosynthetics, Almelo, The Netherlands, has given the sturdy textiles a new form. The Geotube® system involves filling very large tubular textile containers with local sand or sludge to ho…
West Valley TRAX project to use an estimated 1,846,000ft3 of geofoam

August 27, 2009  |  Case Studies

Salt Lake City’s West Valley TRAX project, commissioned by the Utah Transit Authority, is the nation’s second-largest geofoam project, with an anticipated total of 1,846,000ft3 of ACH Geofoam installed along the light-rail tracks. Geofoam was selected in place of soil to save time and mo…
Landfill cover promotes new energy source

August 1, 2009  |  Case Studies

Energy and waste-disposal companies today recognize that landfills aren’t just burial sites for garbage, but reactors where gases produced by decomposing waste can be used for energy production. A great example of this technology is at the Tessman Road Landfill in San Antonio, Texas, where Rep…
Erosion-control mix rebuilds Clyde’s creekbank

August 1, 2009  |  Case Studies

A North Carolina town used a portfolio of geosynthetic erosion-control and reinforcement materials to restore a local streambank and relieve safety threats. Introduction During two weeks in September 2004, the town of Clyde, N.C., was pounded by hurricanes Ivan and Frances, both delivering destructi…
Geosynthetics in the construction of a Southern California subsurface biofilter cell system

August 1, 2009  |  Case Studies

By Ronald S. Johnson, Sang-Sik Yeo, and Randy Sundberg Introduction The primary benefits of geosynthetic materials are the flexibility to accommodate a variety of configurations and as a nonreactive barrier for environmental isolation. These benefits are perfectly matched for this project: construct…
Agricultural applications for geosynthetics

July 24, 2009  |  Case Studies

Containment as a requirement As water becomes more and more scarce—thus, costly—providing a barrier against high rates of water seepage loss will become a requirement in more than just arid and semiarid regions. In addition to water conservation, wastewater containment is an essential component …
Geosynthetics at Flurry Bog

June 1, 2009  |  Case Studies

Piled embankment design, construction,and monitoring for A1/N1 dual-roadway By Wyatt Orsmond Introduction The A1/N1 section of highway between Newry and Dundalk forms part of a strategic transportation link between Belfast and Dublin. This section includes 14.5km (9mi.) of high-quality, dual-carriag…