Английская Википедия:Bowen Bridge

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Шаблон:Short description Шаблон:For Шаблон:Use dmy dates Шаблон:Infobox bridge The Bowen Bridge is a segmental cantilever road bridge crossing the River Derwent in Tasmania, Australia. The bridge serves as a vital transportation link in the state capital of Hobart, facilitating the movement of vehicles, pedestrians, and cyclists between the local government areas of Clarence on the eastern shore and Glenorchy on the western shore. The Bowen Bridge links the East Derwent Highway with the Brooker Highway (as Goodwood Road) at Glenorchy, approximately Шаблон:Convert from the Hobart city centre.

The Bowen Bridge is composed of eight river spans, each measuring Шаблон:Convert. The end spans are Шаблон:Convert and Шаблон:Convert long. It maintains a consistent deck width of Шаблон:Convert, accommodating a Шаблон:Convert divided highway with two lanes each, along with two separated shared-use walkways.[1]

The Bowen Bridge takes its name from British coloniser John Bowen, who founded the first European settlement in Tasmania (then Van Diemen's Land) at Risdon Cove on the eastern shore. Bowen subsequently moved the colony to the western side of the River Derwent, where the Hobart city centre is located today.[2] Prime Minister Malcolm Fraser revealed the bridge's name at a public ceremony at Dowsings Point on 10 October 1980.Шаблон:Sfn

History

Situated approximately halfway between the Tasman Bridge and the Bridgewater Bridge, the Bowen Bridge was constructed to mitigate any future failure of the city's bridges following the Tasman Bridge disaster. The State and Federal Governments established the Joint Committee in November 1975 to oversee the design and construction of a bridge across the River Derwent near Dowsings Point.Шаблон:Sfn Maunsell and Partners served as consulting engineers and Leighton-Candac, awarded the contract in 1980, completed the construction.Шаблон:Sfn[3][4]

Design

The foundational design primarily aimed to ensure the river piers could withstand impacts from barges traveling at operating speeds (Шаблон:Convert) assisted by the current (Шаблон:Convert). All piers were specifically engineered to endure an impact force of Шаблон:Convert at an angle of up to 45 degrees from the pile cap centre line, while other directions could sustain a force of Шаблон:Convert. This approach accounted for potential impact from future river barges of up to Шаблон:Convert of deadweight tonnage. The underlying philosophy involved creating substantial gravity-based foundation structures capable of generating adequate force to absorb the energy and deform the bows of barges during impact.[1]

The design strategy also allowed for future reinforcement to withstand a force of Шаблон:Convert, accommodating potential deadweight tonnage impact of Шаблон:Convert. To meet these ship impact criteria, the river pier foundations were constructed as massive reinforced concrete caisson structures, measuring Шаблон:Convert in outer diameter with Шаблон:Convert wall thickness, built from the ground up.[1]

The deepest among the nine piers extended to Шаблон:Convert below mean sea level. Noteworthy statistics include a total concrete mass of Шаблон:Convert, a reinforcing steel mass of Шаблон:Convert, and a cumulative length of steel tendons reaching Шаблон:Convert.[1]Шаблон:Sfn

Construction

Leighton Contractors implemented a highly efficient balanced cantilever construction technique, notably avoiding the use of falsework within the river – a pioneering approach in Australia at that time.[1] To streamline the construction process, segments were match cast, enabling the deck to be constructed concurrently with the establishment of substantial foundations. This segmental design facilitated swift assembly of the superstructure. The superstructure itself consists of two individual box girders that were erected side by side and connected by an in situ longitudinal joint. The segments were cast in the sequence of their installation. Subsequent segments were directly cast against preceding adjacent segments, utilising a debonding agent on the adjacent surface to allow for separation.[1][4]

The bridge cost Шаблон:AUD49 million to construct and was officially opened on 23 February 1984 by Prime Minister Bob Hawke.[5][6]

Gallery

References

Шаблон:Reflist

Sources

External links

Шаблон:Commons category

Шаблон:Crossings navbox Шаблон:Hobart landmarks Шаблон:Road infrastructure in Hobart Шаблон:Authority control

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  1. ↑ 1,0 1,1 1,2 1,3 1,4 1,5 Ошибка цитирования Неверный тег <ref>; для сносок leighton не указан текст
  2. ↑ Шаблон:Cite web
  3. ↑ Шаблон:Cite web
  4. ↑ 4,0 4,1 Second Hobart bridge contract awarded Freight & Container Transportation July 1980 page 5
  5. ↑ Hobart Electric Traction May 1984 page 93
  6. ↑ Шаблон:Citation
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