Dalewood Road Bridge Replacement

St. Thomas, Canada

The City of St. Thomas commissioned a replacement for the Dalewood Road Bridge, which carries Dalewood Road across the Dalewood Reservoir and Kettle Creek.

Dalewood Road Bridge Replacement

St. Thomas, Canada

The City of St. Thomas commissioned a replacement for the Dalewood Road Bridge, which carries Dalewood Road across the Dalewood Reservoir and Kettle Creek.


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Challenge

The anticipated flood water level was high enough that the use of a traditional below-deck girder bridge would have required a significant grade to the existing Dalewood road. In addition, there were no drawings available for the existing structure. During construction, the below-water geometry of the existing north abutment was found to be much larger than anticipated, such that it interfered with installation of the new H-pile foundation. It was also found to be prohibitively expensive to demolish.

Solution

The use of steel pipe stays to support the girders allowed for the girders to be very slender, precluding a significant grade raise to the existing roadway. The new north integral abutment was used as a deep beam to span across the remaining portions of the existing north abutment, allowing the new H-piles to be shifted away from the interference with the existing abutment.

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