the world's largest double-deck suspension bridge officially opened to traffic
On October 8, Wuhan, the world's largest double-deck suspension bridge, was officially opened to traffic. It is like a golden dragon lying on the Yangtze River, communicating Hanyang and Wuchang. The opening of the bridge will greatly improve the Wuhan urban expressway skeleton system and ease the pressure on the cross-river traffic.
It is the tenth Yangtze River Bridge in Wuhan and the first double-deck highway bridge on the Yangtze River. Its completion and opening to schedule will provide important transportation guarantee for the smooth running of the 7th Military Games and play an important role in comprehensively improving the image of Wuhan city's functional quality.
With a total length of 4.13 kilometers and a two-way 12-lane main bridge, the Yangshuo Port Yangtze River Bridge is the world's largest and most fully used long-span suspension bridge. The public can enjoy the river view on the pedestrian sightseeing route.
The Yangshuo River Yangtze River Bridge crosses the river. Photo by Xia Xuelai
It is understood that the main design of the bridge spans 1,700 meters, one across the river. This main span is the second in the world and the first in the double-deck structure. “One cross over the river” is not only to meet the needs of the waterway, but also because there is a submerged dam under the river between the Yangshuo River Yangtze River Bridge and the Parrot Island Yangtze River Bridge. This water control project existed before the Yangshuo Port Bridge and will only be exposed to the water surface during the dry season. The bridge of Yangshuo Port Yangtze River Bridge is adjacent to one end of the dam. If a pier is set up in the river, it will change the direction of water flow and the ratio of water to sand, affecting the water control project.
Luo Ruihua, deputy chief economist of China Railway Bridge Bureau and project manager of Yangshuo Port Yangtze River Bridge, said: "In addition to the large span of the main span, the Yangshuo Port Bridge also has large capacity, large foundation, large design load, new design structure and new building materials. The use of new features, new construction technology, 'four big four new' features, set a number of records in the construction process."
Starting from July 2015 and opening to traffic in September 2019, the builders will show the world the new "China Speed" again and again: 168 days will weigh 123,000 tons of "Big Mac" sinking sinking In place, 300 days to complete the tower column construction up to 241.2 meters, 82 days to complete the main cable 271 cable strand erection, 36 days to complete the 49 pieces of "thousand tons" steel beam erection......
In the construction process, in order to ensure the efficient operation of the main cable strand erection system, the bridge adopts core technologies such as “double-line reciprocating traction system and gantry type squeezing process” and “sold stock pre-shaping”. The efficiency of the two-wire reciprocating traction system is about twice that of the single-line system. The main cable strands are propelled at a daily average of five speeds, and the highest record of 11 times in the upstream and downstream, 11 times, and the main cable is completed in only 82 days. Erected.
“In the stage of steel beam erection, in order to ensure the erection progress, a total of four transport ships are transported to and from the construction site to ensure that there are two steel beams in the whole bridge area to be able to carry out the beam lifting work every day.” Deputy Chief Engineer of China Railway Bridge Bureau Li Xinghua, chief engineer of Yangshuo Port Yangtze River Bridge, said.
Lin Chi, deputy general manager of Wuhan Chengtou Group, said that the completion of the Yangshuo Port Yangtze River Bridge not only enriched the connotation of Wuhan as a “bridge museum”, but also served as a new era super project, polishing the new business card of Wuhan city, offering new China. 70th anniversary.
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