I-275/SR 93 TIEBACKS & SHEET PILES

Location:

TAMPA BAY, FL

Client:

Mastec Civil

Background

The Florida Department of Transportation (FDOT) has initiated a comprehensive project with multiple phases along Interstate 275 over Old Tampa Bay, stretching between Hillsborough and Pinellas counties. This extensive project includes the construction of the new Howard Franklin Bridge, the expansion of existing roads, and the establishment of pedestrian and cycling pathways. I-275 serves as a vital artery, facilitating the seamless movement of both commuters and goods across the Tampa Bay region.

Schnabel’s Solution

In May 2023, Mastec Civil, the general contractor for the project, contracted with Schnabel to build a cost-effective earth-retention solution to reclaim land along Old Tampa Bay. Schnabel’s earth retention system would allow for the construction of new driving lanes, and pedestrian/bicycle pathways. Schnabel’s scope of work consisted of the installation of sheet piles and tieback anchors to retain a 5,500-foot segment of the newly reclaimed land. Schnabel successfully installed over 1,100 pairs of sheet piles and 534 tiebacks. Schnabel also conducted 453 proof tests, 54 performance tests, and 27 creep tests to ensure the tiebacks would be able to achieve the tensile capacities they were designed for.

Results

Adverse weather conditions and the project’s proximity to Tampa International Airport posed significant challenges. The intense Florida summer heat, with temperatures exceeding 110°F, subjected workers to demanding conditions, prompting frequent breaks at cooling stations. Strong winds often interrupted operations due to safety concerns, as wind speeds reached hazardous levels for hoisting sheet piles and the drill mast. Additionally, the project had to adhere to FAA-imposed height restrictions due to its proximity to the airport, requiring constant monitoring of crane heights. Moreover, Hurricane Idalia caused a major setback, leading to the shutdown of operations for several weeks.

Despite facing numerous operational and weatherrelated obstacles, Schnabel successfully completed the project three months ahead of FDOT’s tentative schedule. Their earth retention services along the I-275 corridor will support FDOT in constructing new pedestrian paths and lanes, ultimately easing traffic congestion and offering more commuting and recreational options for the growing Tampa Bay region.

Quick Facts

Location

Tampa Bay, Florida

Client

Florida Department of Transportation (FDOT)

Market

Transportation / Infrastructure

Work Performed

Sheet piles & tiebacks

Completion Date

April 2024

Duration

--

Contract Value

--

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Quick Facts

Location

Client

Market

Work Performed

Completion Date

Duration

Contract Value

Tampa Bay, Florida

Florida Department of Transportation (FDOT)

Transportation / Infrastructure

Sheet piles & tiebacks

April 2024

--

--

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