Lake Shore Boulevard East Bridge Extension & Widening

Toronto, Canada

Lake Shore Boulevard East is carried across the mouth of the Don River by a pair of two-span, slab-on-steel girder bridges.

Lake Shore Boulevard East Bridge Extension & Widening

Toronto, Canada

Lake Shore Boulevard East is carried across the mouth of the Don River by a pair of two-span, slab-on-steel girder bridges.

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Challenge


The new bridges must provide navigational clearance for barge traffic without raising the road grade. Conflicts between the new bridge foundations and the existing Gardiner Expressway foundations are also a challenge.

Solution

The use of prestressed, precast concrete I-girders with a conventional 225-mm-thick deck would not provide sufficient navigational clearance, so the superstructure for the new bridges will be comprised of 800-mm-deep prestressed, precast concrete box beams with a 150 mm concrete overlay. Also, the new bridge foundations utilize the abutments and pier caps as deep beams to span over the existing piled foundations of the Gardiner Expressway.

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