Abstract
The Merivale Rail Bridge crosses the Brisbane River and has as its main span a 132 m tied steel arch. The cable pattern is unusual and was derived to maximize the stiffness of the span under railway loading. The river foundations are large diameter piles formed from precast concrete "boats," which became the lower parts of the piers. This arrangement avoided underwater work and provided a robustness commensurate with shipping movements in the river. Approach spans are cast in situ prestressed concrete continuous viaducts except where clearance restrictions to existing roadways necessitated cast in situ prestressed concrete through bridges. Investigation, design, fabrication, and construction are described. Key words: railroad bridges, tied arch, steel construction, bridge foundations, prestressed concrete cables.
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