Wanxian Bridge
Coordinates: 30 ° 45 ′ 35 " N , 108 ° 25 ′ 11" E
| Wanxian Bridge | ||
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| Official name | 万州 长江 大桥 Wànzhōu Chángjiang Dàqiáo | |
| Convicted |
 YuYi Expressway
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| Crossing of | Yangtze River | |
| place | Wanzhou | |
| construction | Reinforced concrete arch bridge | |
| overall length | 864 m | |
| width | 24 m | |
| Longest span | 420 m | |
| Arrow height | 84 m | |
| Arrow ratio | 1: 5 | |
| start of building | 1994 | |
| opening | 1997 | |
| location | ||
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The arch bridge , originally called Wanxian Bridge or Wanxian-Yangtze Bridge ( Chinese 萬縣 長江 大橋 / 万县 长江 大桥 , Pinyin Wànxiàn Chángjiang Dàqiáo ) and still known by this name in the west , crosses the Yangtze River in what was then Wan County (Wanxian) , which belonged to the Chinese province of Sichuan .
The bridge was built between 1994 and 1997.
Surname
In March 1997, the city of Chongqing and the associated large administrative district were spun off from Sichuan Province as a city under the government. Wan County became the Wanzhou District ( 万州 区 , Wànzhōu Qū ) of Chongqing. The bridge has therefore been called the Wanzhou-Yangtze Bridge ( 万州 长江 大桥 , Wànzhōu chángjiāng dàqiáo ) since then .
description
The Wanxian Bridge is around 7 km south of downtown Wanzhou. It leads the national road G318 called YuYi Expressway with four lanes and sidewalks on both sides at a height of, depending on the water level, at least 90 m above the river, which is dammed by the Dreischluchtendamm 250 km further to the east . Originally the bridge stood high above the still free-flowing Yangtze River. If the storage target is now reached, their abutments and the arches are in the water.
The total of 864 m long structure consists of a reinforced concrete arch with a CFST frame and an elevated deck.
The arch has a span of 420 m and an arrow height of 84 m, thus an arrow ratio of 1: 5. The arch has a rectangular, three-cell hollow cross-section with a constant height of 7.0 m and a width of 16.0 m. For its construction, a box-shaped CFST arch was first created from 2 × 5 tubes with a diameter of 40.2 cm, which were connected to one another by truss struts. The pipe bend was installed with the help of a cable crane , which was stretched between scaffolding pillars , which were used to further raise the 90 m high bridge piers above the abutments.
For the CFST bend, 36 pipe segments, each 12.9 m long and 60 t in weight, were manufactured at a shipyard 200 km upstream, transported to the construction site by ship, lifted into place, assembled and braced to the piers. The finished and therefore stable pipe bend was then filled with concrete. After hardening, the arches were provided with formwork in sections based on the Melan construction method and set in concrete. First, the inner cell of the hollow box was concreted, which could then take over the loads from the concreting of the outer cells.
13 conventionally built double reinforced concrete columns with a hollow cross-section with a center distance of 30.7 m serve to elevate the girder. The two pillars above the abutments as well as the 4 pillars on the western and the 7 pillars on the eastern bank slope are double and are at the same distance.
The track support consists of a prestressed concrete - T-beams .
When completed, the Wanxian Bridge was the longest concrete arch bridge in the world; it relegated the Croatian Krk Bridge to second place. It has since been overtaken by the Qinglong Railway Bridge , which opened in 2016 .
See also
Web links
- Wanxian Yangtze River Bridge on HighestBridges.com
- Bangzhu XIE: Wanxian Long Span Concrete Arch Bridge over Yangtze river in China . In: Chinese-Croatian Joint Colloqium, Long Arch Bridges, Brijuni Islands, July 10-14, 2008 . July 2008, p. 181-187 ( psu.edu [PDF; 341 kB ]).
- Baochun Chen: Wanxian Yangtze River Bridge in China . In: Wai-Fah Chen, Lian Duan (Eds.): Bridge Engineering Handbook, Second Edition: Superstructure Design . 2nd Edition. tape 2 . CRC Press, Boca Raton FL 2014, ISBN 978-1-4398-5221-7 , pp. 350 ( limited preview in Google Book Search).
- Yangtze River Bridge Wanxian. In: Structurae