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Rail viaduct project blends old and new infrastructure in Tallinn
May 2nd, 2023
When Selektor Projekt OÜ won the bid for the Paldiski Road Viaduct project as part of Estonian Railway’s multi-year expansion project, the team of engineers was ready to take on the three-part challenge of designing a railway viaduct, a widened embankment, and a retaining wall to support a new rail line through the center of […]
Redi-Rock walls aid in innovative sewer and storm water solution
March 8th, 2023
During the 19th century, early settlers to Cincinnati, Ohio, followed the Lick Run valley and stream to settle in the developing city along the Ohio River. To control flooding in the area, the stream was enclosed in a 20-foot-diameter storm sewer in 1893. Soon after, during the advent of indoor plumbing, homes were tied into […]
Strength Reduction Of Geogrids Used In Reinforced Walls
February 1st, 2023
Q:At the moment there are two issues that create uncertainty with the use of PET fabrics and geogrids in the Netherlands. First, for many years we built pile-supported geosynthetic reinforced embankments (so-called piled mattresses to reduce settlements under embankments on soft soils). The fill is supported by a geosynthetic mat, which rests on top of […]
ACE Geosynthetics wins IAAs in the geosynthetics category
April 1st, 2022
ACE Geosynthetics Inc. incorporated geogrids and geotextiles into mechanically stabilized earth (MSE) walls for a highway interchange project in the Middle East. Photograph courtesy of ACE Geosynthetics Inc. The northern part of a highway interchange project in the Middle East is adjacent to a developing industrial park; a densely populated city is located to the […]
Ground improvements using geofoam: A case history
October 14th, 2020
By Javaid M. Alvi, Ph.D., and Jahangir J. Kabir, Ph.D., P.E The project site is a triangular-shaped property located at the intersection of Raleigh Avenue and West Liberty Avenue in the Borough of Dormont, Allegheny County, Pa. (Figure 1). The site housed two Nissan buildings, one with a showroom at the top floor and the […]
PVC sheet piling for cutoff and containment barriers
August 1st, 2020
By Brendan Sheppard and Steve Hargrave FIGURE 1 30-foot (9.1-m) long PVC sheet pile installed with a fixed mast pile driver in August 2015 Polyvinyl chloride (PVC) sheet piling (Figure 1) has been used for more than 25 years in bulkheads throughout the United States and beyond as a replacement for steel, concrete and timber […]
Geosynthetic strip MSE wall at Point Defiance Marina
April 1st, 2020
By Paul C. Frankenberger and Robert Lozano This article will focus on a geosynthetic strip mechanically stabilized earth (MSE) wall case study using discrete geosynthetic strips with large precast facing panels (Figure 1), an innovation of the original MSE invention. The system is the Highway Innovative Technology Evaluation Center/National Transportation Product Evaluation Program reviewed GeoMega […]
Geosynthetics: An extraordinary handler of water
April 1st, 2020
Most geosynthetics deal with water in some shape or form. Geosynthetics are an extraordinary handler of water, whether the project involves erosion control, water storage, wastewater, stormwater, seawater or mining. This issue of Geosynthetics looks at water applications in several forms. Drainage, leak detection layers, potable water storage, a mechanically stabilized earth (MSE) wall at […]
GSI hosts webinar on MSE wall back drainage design
May 9th, 2018
The Geosynthetic Institute (GSI) will sponsor a webinar entitled “MSE Wall Back Drainage Design,” on May 23, 2018, from 11:30 a.m. to 1 p.m. EDT. Within GSI’s database of 301 failed mechanically stabilized earth (MSE) walls reinforced with geogrids or geotextiles, 64% have failed due to water. Furthermore, 73% have been constructed with fine-grained silt […]