Pyes Pa Bypass Bridge

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YEAR:

Design / Build a 4 lane x 30m span reinforced concrete bridge on bored pile foundations, for new NZTA route, incl. 14 no. 600dia bottom driven reo concrete piles and precast Super Tee deck sections.

This new two-lane bridge with a shared cycleway provides for the alignment of the Pyes Pa Bypass Highway, SH36. The bridge spans a local access road to “The Lakes” subdivision and was undertaken as a design / build contract with BBO as the designer of the bridge.

The project consisted of the installation of 14 no 600-mm diameter bottom driven steel piles driven to depths of up to 25m through variable soils. The piles had a reinforcing steel cage lowered inside and were then concreted throughout the full length. Precast wingwalls were then constructed and incorporated into in-situ reinforced concrete abutments. Precast facing panels were also constructed to span between the panels providing a smooth concrete facing on the abutments.

The client required the bridge to consist of a clear 30m span for which precast, pre-stressed Super T beams were adopted in the design, due to their cost effectiveness for large spans. An insitu reinforced concrete topping was poured tying the precast beams to the abutments completing the structure.

Service ducting was provided within the concrete structure and powder coated steel handrailings were installed to complete the project.