Case

Studies

GRL Engineers offer a wide range of deep foundation testing and consulting services, nationwide. Most GRL Engineers have achieved Advanced Level or higher on both the PDCA/PDI Dynamic Measurement and Analysis Proficiency Test.

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Dynamic Load Testing on Helical Piles

Challenge: The YWCA of Toledo wanted to add 11,000+ sf of usable space by installing a foundation through the existing basement swimming pool to support two new floors being constructed above it. Due to low clearance restrictions within the building structure, micropiles were used in the initial foundation design. The specialty foundation contractor, Toledo Caisson Corporation, realized potential cost savings by utilizing helical piles for the foundation and provided a…
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Multi-Year Testing on Highway I-69

Challenge: The construction of I-69, a major US interstate highway that starts at the bottom of Texas and travels northeast to Michigan and into Ontario, was a multi-decade endeavor and a massive undertaking for the FHWA. GRL Engineers provided a multitude of testing services throughout the state of Indiana. Some of these projects included notable reconstruction on a 67-mile segment in Indiana, as well as the I-69 Finish Line Project,…
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Offshore Wind Farms in New Jersey

Challenge: GRL Engineers were brought onto a research project related to offshore wind to provide deep-foundation expertise. The New Jersey coastline has been expanding its offshore wind efforts since the signing of Executive Order 28 from New Jersey Governor Murphy in 2020. Addressing the potential in South Jersey for wind farms, studies on glauconite soil deposits have been a focal point for various universities. GRL Engineers conducted a driven-pile test…
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Bonner Bridge
Since the Bonner Bridge was constructed in 1965, numerous hurricanes have struck the Atlantic coast wreaking havoc on the Outer Banks of North Carolina. As a result, GRL Engineers were called in to help aid in the replacement of this nearly three-mile long bridge across the Oregon Inlet from Bodie…
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Kentucky Lake Bridge
Eggner’s Ferry Bridge, also known as Kentucky Lake Bridge, was the first of two major structures in the Lake Bridges Projects. The bridge carries US-68 over Kentucky Lake, connecting the land between the lake’s National Recreational Area and includes a basket handle tied arch over the main navigational channel. Johnson…
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SR 36 Bridge over Tuscarawas River
Large diameter open end pipe piles with interior constrictor plates were chosen as the foundations for the SR 36 bridge over the Tuscarawas River in Gnadenhutten, OH. In addition, a nearly 2,400 kip static load test was specified to evaluate the design methods used for this pile type. GRL was…
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I-90 Innerbelt Bridge
The George V. Voinovich Bridge, also known as Cleveland’s Innerbelt Bridge, carries I-90 over the Cuyahoga River Valley near downtown Cleveland, Ohio. The construction was completed in two design-build phases and was the first design-build project for the Ohio Department of Transportation. The six year, $566 million, twin bridge project…
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