Construction background
For a long time, Zhoushan has been isolated from overseas because of a water barrier, and the island economy has been greatly restricted. Abandoning water and going ashore directly has become an increasingly strong dream of Zhoushan people. 1September 26th, 999, this dream finally came true. With the great attention of the relevant state departments and the Zhejiang Provincial Party Committee and Government, the first chapter of this magnificent poem, cengang Bridge, was officially started. The whole island connecting project consists of Jintang, Xihoumen, Taoyaomen, Xiangjiaomen, five sea-crossing bridges in cengang and connecting roads. It starts from Zhoushan Island, passes through Li Yao, Fuchi, Cizi and Jintang, and connects with Hangzhou-Shaoyong Expressway. The contact point is located on the west side of Zhenhai Refinery, with a total length of about 50 kilometers. In 2003, cengang Bridge, Banana Gate Bridge and Taoyaomen Bridge were all completed, and the finishing work was completed in 2004. These three bridges are called the first phase project of Continental Island, with a total investment of11million yuan. In February, 2005, Jintang Bridge and Xihoumen Bridge, the two most critical links of Zhoushan Continental Link Island Project, were officially approved by the state. As the second phase of the mainland island connection project, it is the largest infrastructure construction project in Zhoushan's history, with a total investment of more than 654.38+0 billion yuan. After the completion of the cross-sea bridge, the journey from Zhoushan to Ningbo and Hangzhou will be greatly shortened. Together with the completed Hangzhou Bay Bridge, the journey from Zhoushan to Shanghai via the south bank of Hangzhou Bay will be shortened to three hours, which will make Zhoushan more closely integrated into the Yangtze River Delta economic circle. Zhoushan will fully enter the bridge era. Zhoushan sea-crossing bridge was officially opened to traffic at 23: 58 on February 25th, 2009.
Zhoushan sea-crossing bridge is a sea-crossing bridge invested and built by Zhejiang Communications Investment Group. It starts from Ya Dan Mountain Huandao Road, National Highway 329 in Zhoushan Island, passes through Diaoli Island, Fuchi Island, Cizi Island and Jintang Island in Zhoushan Islands to zhenhai district, Ningbo, and is connected with Ningbo Ring Expressway and Hangzhou Bay Bridge. Zhoushan Continental Link Island Project spans 4 islands, 9 culverts and 2 tunnels, with an investment of10 billion yuan. Project * * * Construction of five bridges, namely cengang Bridge, Xiangjiaomen Bridge, Taoyaomen Bridge, Xihoumen Bridge and Jintang Bridge, with a total length of 48km, designed according to expressway standards, with four lanes in both directions, designed driving speed of 100km/h, subgrade width of 22.5m, and bridge and culvert are the same width as subgrade. Among them, many super-large bridges entered the world 10. Among them, Xihoumen Bridge, which spans Xihoumen Waterway and connects Jintang Island and Cizi Island, is a long-span suspension bridge next to Akashi Strait Bridge in Japan.
engineering scale
Zhoushan sea-crossing bridge is the largest and most influential traffic infrastructure project in Zhoushan. The project is built according to the highway standard, with a total length of 48. 16 km and a total investment of10 billion yuan. This is the largest island-land contact project in the world.
Many of the best in the world.
Zhoushan sea-crossing bridge, with its huge scale and special geographical location, has "forced" nearly 100 technological innovations in its construction. Li, deputy director of the Zhejiang Provincial Department of Transportation and director of the Highway Administration Bureau, said that among the 25 scientific and technological projects identified, 1 has reached the international advanced level, 20 have reached the international advanced level and 4 have reached the domestic advanced level. These achievements provide strong technical support for the smooth construction of the bridge, and also make the bridge construction create a number of world firsts.
The main bridge of Xihoumen Bridge is a two-span continuous steel box girder suspension bridge with the highest technical requirements among the five bridges. With a main span of1.650m, the bridge is the largest steel box girder suspension bridge in the world. Prior to this, the largest span of the steel box girder suspension bridge in the world was the Danish Dabel Bridge, with a main span of1.624m.. In addition, Xihoumen Bridge is the world's first double-box split steel box girder suspension bridge.
Xihoumen Bridge is one of the most demanding bridges against wind in the world. The split steel box stiffening beam without precedent in the world is adopted to meet the requirements of wind resistance and stability. The critical flutter wind speed is above 88m/s, which can resist 17 super typhoon.
-During the construction of the bridge, the helicopter was used to guide the cable to cross the sea for the first time in China, and the mode of separating the cable release system from the helicopter was pioneered in the world, which realized the navigation of the cable without sealing the sea for the first time.
—— Span of main navigation hole of Jintang Bridge 1, 2 10/0m. It is a five-span steel box girder cable-stayed bridge with twin towers and double cable planes with a main span of 620 meters. It is the largest span cable-stayed bridge built in complex offshore environment in the world.
—— The combined system of steel corbel and steel anchor beam used for anchoring the inclined Lasota end of the main navigation hole of Jintang Bridge is the first in the world, which successfully solves the cracking problem in the anchorage zone at the tower end and improves the structural durability.
In addition, the bridge construction has also created a number of domestic firsts. For example, the length and material strength of the main cable of Xihoumen Bridge are the first in China, and domestic high-strength galvanized steel wire is used for the first time in the construction of long-span bridges in China. The anti-collision steel box of cable tower cap of Jintang Bridge is the largest anti-collision steel box hoisted in the construction of cross-sea bridge in China.
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