Design and Construction of Twin Composite Steel Box Girder Bridges Over Minmi Creek: Hunter Expressway Alliance
- Publication no: ABC-DES404-14
- Published: 22 October 2014
The Twin Composite Steel Box Girder Bridges Over Minmi Creek are part of the Hunter Expressway Alliance Project F3 to Kurri Kurri Section, a road infrastructure project consisting of 13 kilometres of new freeway construction and local road adjustments. In conjunction with the adjoining design and construct project, the completed project will provide 40 kilometres of dual two-lane carriageways between the F3 Interchange in the west and the New England Highway west of Braxton. The Alliance comprised Roads and Maritime Services, Thiess, Parsons Brinckerhoff and Hyder Consulting.The twin bridges carry the east and westbound carriageways of the expressway over Minmi Creek. Each carriageway has a constant width between kerbs of 10.7 m and 10.5 m respectively and allows for provision of 3 lanes in the future. The bridges are single-span simply supported structures with an overall deck length of 57 m and a skew of 46 degrees approximately. The superstructure of each bridge consists of two 2800 mm deep steel trough girders with a 230 mm minimum thick composite deck slab comprising 75 mm thick precast concrete permanent formwork panels and a 155 mm thick cast-in-place reinforced concrete slab.