This paper was presented at the `Innovative Bridge Projects, 1993-96' session. Vancouver's Oak Street Bridge was designed and constructed in the 1950's and remains a key link in the BC Lower Mainland's transportation system. A major rehabilitation of the structure was required in 1995 due to extensive deterioration of the two km long bridge deck and the precast sidewalk panels. Recent traffic accidents on the bridge had highlighted important safety deficiencies that were corrected by cast-in-place concrete parapets and a precast median barrier. Other major project elements included: removal of the existing asphalt and deteriorated concrete; addition of an overlay of high performance concrete, followed by a waterproof membrane, and new asphalt. The deteriorated concrete on the underside of the bridge deck was also removed and patched, and the bridge deck expansion joints replaced. This paper describes the steps taken to address these issues. (A)
Samenvatting