Lazelle Road Widening & Railroad Bridge Replacements

The Lazelle Road widening was a vital railroad bridge replacement project in Columbus, Ohio. Two bridges operated by CSX and Norfolk Southern (NSRR) pass over Lazelle Road, but urban growth created a traffic congestion bottleneck on the thoroughfare in the area of adjacent businesses and the Polaris Fashion Mall.

The dual railroad bridge replacements included the phased installation and demolition of shoring and temporary structures. Construction at this difficult-to-access site challenged the designers more than a typical railroad bridge replacement project. Detailing phased structures and access was key to the project’s smooth progress and improved safety, while keeping the traffic flowing on Lazelle Road and the freight rail moving above it.

With a tight right-of-way, difficult access, and 1.5:1 railroad embankment side slope, the method and sequencing of construction required significant forethought and coordination with multiple parties. A tangent drilled shaft wall constructed from the top down was a natural fit given the shallow shale, but consistent access between the two bridges was still required.

An innovative, multi-phased shoring installation and removal process was designed to allow the contractor access to the tight area between the tracks and to reuse the shoring in subsequent phases by removing it in sections.

The complexity of the design included access roads into the work zone between the tracks and a temporary shoring phasing scheme, which was critical to maintaining an uninterrupted rail traffic flow. The shoring design required multiple phases of multiple elements deflecting in different directions without exceeding the maximum allowable calculated deflection of 3/8 of an inch at any one time.