On-Site Magazine

Oakville bridge marks major milestone

By Adam Freill   

Bridges Construction

COWI and BOT Construction Group reach key cantilever point in William Halton Parkway Bridge project.

Construction progress on the William Halton Parkway Bridge. (Photo courtesy of COWI)

International engineering consultancy COWI and BOT Construction Group have achieved a critical milestone in the construction of the North Bridge, part of the William Halton Parkway extension project in Oakville, Ont. The project has successfully achieved continuity within Spans 2 and 3 of the bridge’s superstructure between the segmentally built cantilevers.

At this milestone, the team has reached the balanced ends of the West and East cantilevers of the North Bridge, casting a total of 50 segments, two pier tables, and an end span section at the east abutment. To achieve the continuity in the superstructure, the closure segments for Spans 2 and 3 have been cast with post-tensioning tendons stressed through the closure concrete.

As construction progresses, all form travellers, except for the one on the extended west cantilever of the West Pier, will be demobilized and relocated to the South Bridge for the start of its balanced cantilever construction. BOT will continue casting the “extended” west cantilever in the upcoming weeks, using a temporary stay tower and stay cables to provide additional support during the bridge casting process.

“We are excited to reach this significant milestone with the BOT team on the construction of the North Bridge,” said Ivan Liu, senior bridge engineer with COWI in North America. “From our experience, getting to this stage on a segmental bridge project is not an easy task and it shows the extensive effort, quality, and skill of the BOT team.”

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The two new bridges over Sixteen Mile Creek, part of the William Halton Parkway extension project, are being constructed using a cast-in-place segmental construction technique, employing a movable form traveller system. Once completed, the bridges will span 280 metres and each will host two lanes for traffic as well as pedestrian walkways, providing vital connectivity between Third Line and Neyagawa Boulevard.

COWI, responsible for construction analysis, geometry control, erection manuals, and construction support, along with the design of temporary work structures, is working closely with BOT Construction Group to ensure the successful completion of these significant infrastructure assets for the growing Halton region.

 

www.cowi.com

 

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