Geosynthetic portable cofferdams for civil construction applications

August 1, 2021  |  Feature

Cofferdams are an enclosure built within or across a body of water to allow the enclosed area to be dewatered. This creates a dry working environment so construction can be carried out properly and safely. Typical cofferdams are welded-steel structures consisting of sheet piles, wales or cross brace…
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Dewatering of sludge from a sewage treatment plant with geotextile tubes

June 1, 2021  |  Case Studies, Feature

Water is an important resource for people’s quality of life and is indispensable for several uses, including desedentation. However, this resource is finite and available in small quantities in the quality of fresh water, at liquid state and on the surface. Therefore, rivers and lakes, providers o…
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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 …
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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)…
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Modular geosynthetics construction

April 1, 2021  |  Feature

Modular construction is a process in which a building or other item is constructed primarily off-site; under controlled factory conditions; and using the same design, materials, equipment, testing and construction quality control and assurance (CQC/CQA) techniques as a field-constructed facility—b…
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Development of a new design method for geosynthetic-reinforced RPEs

April 1, 2021  |  Feature

Rapid and extreme climate change is putting our planet under stress. As a consequence, in mountain and hilly regions, infrastructure and people are more often threatened by quick and unpredictable rockfall events. Falling boulders can have extremely high speeds, exceeding 11 mph (5 m/s) and up to 67…
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Comparative analysis of the flow and filtration capabilities of sediment retention devices—Part 2

April 1, 2021  |  Feature

Sediment retention devices (SRDs) include silt fences, wattles, filter logs, compost socks and various types of stormwater inlet protectors. They are a widely used best management practice (BMP) to provide sediment filtration from stormwater runoff while allowing water passage. However, SRD performa…
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Comparative analysis of the flow and filtration capabilities of sediment retention devices—Part 1

February 1, 2021  |  Feature

By James E. Sprague and C. Joel Sprague Sediment retention devices (SRDs) include silt fences, wattles, filter logs, compost socks and various types of stormwater inlet protectors and are a widely used best management practice (BMP) to provide sediment filtration from stormwater runoff while allowin…
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