Bonacci Infrastructure delivered the design for the Pacific Motorway Upgrade between Springwood and Daisy Hill as part of a joint venture with GHD. Bonacci Infrastructure completed all structural design works, whilst GHD was responsible for civil and highway design. The project was completed as a Design and Construct (D&C) contract with a guaranteed maximum price.
Structural components of the project included two parallel 75 metre long bridges over the motorway, one 25 metre span bridge over the new veloway, and an 18 metre wide cut-and-cover tunnel with a total length of 50 metres.
Bonacci Infrastructure also designed a number of contiguous pile walls with a retained soil height of up to 10 metres, various reinforced earth walls, cast in-situ concrete retaining walls, large traffic signs, noise walls, drainage structures, and concrete barriers.
The Loganlea interchange is the key feature in the 6 kilometre upgrade. It includes twin 70 metre long bridges for vehicles and pedestrians over the Pacific Motorway, which accommodates more than 100,000 vehicles per day. The bridges comprise two 28 metre spans and a 14 metre span constructed using precast concrete planks and an in-situ concrete slab.
Other project features include a 50 metre long curved cut-and-cover tunnel with an 18 metre span and a 22 metre single span bridge over the cycleway.
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