Zhoushan sea crossing bridge

Zhoushan sea crossing bridge is the largest and most influential transportation infrastructure project in Zhoushan City. The project is built according to the highway standard, with a total length of 48.16 km and a total investment of over 10 billion yuan. It is the largest island land connection project in the world.

Zhoushan sea crossing bridge

Zhoushan sea crossing bridge (also known as Zhoushan mainland Island connecting project) is the main part of Yongzhou Expressway (g9211) in the national expressway network. The cross sea bridge is invested and constructed by Zhejiang communications investment group.

Zhoushan sea crossing bridge starts from yadanshan ring road of 329 National Highway on Zhoushan Island, passes through Lijiao Island, Fuyi Island, Cezi island and Jintang Island in Zhoushan archipelago to Zhenhai District of Ningbo, and connects with Ningbo Ring Expressway and Hangzhou Bay Bridge. Zhoushan sea crossing bridge spans 4 islands, turns over 9 culverts and passes through 2 tunnels, with an investment of 13 billion yuan. On December 25, 2009, the bridge was officially opened to traffic.

Construction background

For a long time, Zhoushan island economy has been greatly restricted because of the isolation of a river and the isolation of Zhoushan from overseas. Abandoning water to land and reaching the other side has become an increasingly strong dream of Zhoushan people. On September 26, 1999, this dream was finally realized. With the great attention of the relevant state departments and Zhejiang provincial Party committee and government, the construction of Cengang bridge, the first chapter of Zhoushan mainland Island connecting project, was officially started.

The whole island connecting project is composed of Jintang, Xihoumen, Taoyaomen, xiangjiaomen and Cengang cross sea bridges and connecting roads. It starts from Zhoushan Island and passes through tongshou of Lidiao, Fuyi, Cezi and Jintang islands, and connects with Hangzhou Shaoxing Ningbo Expressway. The connecting point is located in the west of Zhenhai Refinery, with a total length of about 50 km. In 2003, Cengang bridge, xiangjiaomen bridge and Taoyaomen bridge were completed, and the finishing work was completed in 2004. The three bridges are known as the first phase of the mainland Island project, with a total investment of 1.1 billion yuan. In February 2005, Jintang Bridge and Xihoumen Bridge, the most critical links of Zhoushan Island connecting project, were officially approved by the state. As the second phase of the mainland Island connecting project, it is the largest infrastructure construction project in Zhoushan history, with a total investment of more than 10 billion yuan. After the completion of the whole cross sea bridge, the driving distance between Zhoushan and Ningbo and Hangzhou will be greatly shortened. In addition to the completed Hangzhou Bay Bridge, the driving distance from Zhoushan to Shanghai via the South Bank of Hangzhou Bay will also be shortened to 3 hours, which will make Zhoushan more closely integrated into the Yangtze River Delta economic circle. Zhoushan will enter the era of bridge in an all-round way. Zhoushan sea crossing bridge was officially opened to traffic at 23:58 on December 25, 2009.

Zhoushan sea crossing bridge is a sea crossing bridge invested and constructed by Zhejiang communications investment group. It starts from yadanshan ring road of 329 National Highway on Zhoushan Island, passes through Lijiao Island, Fuyi Island, Cezi island and Jintang Island in Zhoushan archipelago to Zhenhai District of Ningbo, and connects with Ningbo Ring Expressway and Hangzhou Bay Bridge. Zhoushan mainland Island connecting project spans four islands, turns over nine culverts and passes through two tunnels, with an investment of more than 10 billion yuan. The project will jointly build five bridges, namely, Cengang bridge, xiangjiaomen bridge, Taoyaomen bridge, Xihoumen Bridge and Jintang Bridge, with a total length of 48 km. They are designed according to the highway standard, with two-way four lanes, a designed driving speed of 100 km / h, a subgrade width of 22.5 m, and the same width of bridges and culverts as the subgrade. Among them, the spans of many super large bridges are among the top 10 in the world. Among them, Xihoumen Bridge, which spans Xihoumen waterway and connects Jintang Island and Cezi Island, is a large-span suspension bridge in the world second only to Akashi Strait Bridge in Japan.

Project scale

Zhoushan sea crossing bridge is the largest and most influential transportation infrastructure project in Zhoushan City. The project is built according to the highway standard, with a total length of 48.16 km and a total investment of over 10 billion yuan. It is the largest island land connection project in the world.

Many of the best in the world

In the construction of Zhoushan sea crossing bridge, which has a large scale and special geographical location, nearly 100 technological innovations have been made. Li Liangfu, deputy director of Zhejiang Provincial Department of transportation and director of highway administration, said that among the 25 identified scientific and technological projects, 1 has reached the international leading level, 20 have reached the international advanced level, and 4 have reached the domestic leading level. These achievements not only provide strong technical support for the smooth construction of the bridge, but also make the construction of the bridge create many world first.

——The main bridge of Xihoumen Bridge is a two span continuous steel box girder suspension bridge, which is the most technically demanding of the five bridges. The main span of the bridge is 1650 meters, which is the largest steel box girder suspension bridge in the world. Before that, the largest span of steel box girder suspension bridge built in the world was the dabeier bridge in Denmark, with a main span of 1624m. In addition, Xihoumen Bridge is the first double box split steel box girder suspension bridge in the world.

——Xihoumen Bridge is one of the bridges with the highest wind resistance requirements in the world. It adopts the split steel box stiffening beam, which has no precedent in the world, and meets the requirements of wind resistance stability. The flutter critical wind speed reaches more than 88 M / s, and it can resist the super typhoon of grade 17.

——In the process of bridge construction, it is the first time in China to use helicopter to pull the pilot cable across the sea. The mode of separating the cable release system from the helicopter is the first in the world. It is the first time that the pilot cable across the sea is not closed.

——The main navigable span of Jintang Bridge is 1210 meters long, with a main span of 620 meters. It is a five span, double pylon, double cable plane steel box girder cable-stayed bridge, which is the largest span cable-stayed bridge built in the world in complex offshore environment.

——The combined system of steel corbel and steel anchor beam used in the anchorage of cable tower end of Jintang Bridge's main navigable span is the first in the world, which successfully solves the problem of cracking in the anchorage zone of cable tower end and improves the structural durability.

In addition, the bridge construction also created a number of domestic first. For example, the main cable length and material strength of Xihoumen Bridge are the first in China, and one of the main cables uses domestic high-strength galvanized steel wire for the first time in the construction of long-span bridges in China; the anti-collision steel box of Jintang Bridge Pylon cap is the largest anti-collision steel box in the construction of cross sea bridges in China.

Main works

Cengang Bridge

Cengang bridge is the first sea crossing bridge in the island connecting project. It was started on September 26, 1999 and completed on July 28, 2001. Cengang bridge crosses Cengang waterway and connects Cengang and Lidiao island. The bridge is 793 meters long, 22.5 meters wide, two-way four lane. The main bridge is a three span 50 meter simply supported and then continuous prestressed concrete T-beam with navigation grade of 300 tons, navigation net height of 17.5 meters and navigation net width of 2 × 40 meters. The main bridge is a three span 50 meter simply supported and then continuous prestressed concrete T-beam.

Xiangjiaomen Bridge

Xiangjiaomen bridge is the second sea crossing bridge of Zhoushan mainland Island connecting project. The construction started on December 25, 1999 and was completed on December 12, 2002. Xiangjiaomen bridge crossed xiangjiaomen waterway, connecting Lidiao island and Fuchi island. At that time, it was the longest sea crossing bridge in East China. The bridge has a total length of 951m, a deck width of 22.5m, two-way four lane, a navigable grade of 500t, a navigable net height of 21m, and a navigable net width of 135m. The main bridge is a long-span prestressed concrete continuous box girder of 80m + 150m + 80m, and the approach bridge is a simply supported continuous prestressed concrete T girder.

On December 1, 2004, the bus lines of Cengang bridge and xiangjiaomen bridge were opened. Lijiaoshan and Fuchi bid farewell to the history of only taking a boat to Zhoushan Island.

taoyaomen bridge

Taoyaomen bridge is the third sea crossing bridge of Zhoushan mainland Island connecting project. Construction started on March 28, 2000 and completed on April 16, 2003. Taoyaomen bridge crosses Taoyaomen waterway and connects Fuchi island and Cezi island. It is 888m long, 27.6m wide and has two-way four lanes. The navigation grade is 2000 tons, the navigation net height is 32 meters, the navigation net width is 280 meters, the main bridge is a double tower double cable plane semi floating system hybrid cable-stayed bridge with a main span of 580 meters, the bridge span is arranged as 48 meters + 48 meters + 50 meters + 580 meters + 50 meters + 48 meters + 48 meters, and the main tower height is 151 meters.

xihoumen bridge

Xihoumen Bridge is a super large bridge with the highest technical requirements among the five sea crossing bridges connecting Zhoushan Island and Ningbo. The main bridge is a two span continuous steel box girder suspension bridge with a main span of 1650 meters. It is the world's largest span steel box girder suspension bridge. Its total length ranks second in the world and first in China among suspension bridges, but the length of steel box girder suspension cable ranks first in the world. The designed navigation grade is 30000 tons and the service life is 100 years.

Xihoumen Bridge is located in the sea area frequently affected by hurricanes, where the hydrological, geological and climatic conditions are complex. However, there is no practical precedent for the construction of super long span steel box girder suspension bridge in the wide sea area of typhoon area in China. All bridge builders adhere to the concept of innovation, management innovation and scientific and technological innovation, the implementation of fine management, overcome difficulties, and strive to overcome one difficulty after another. When typhoon "Weipa" in mid September and typhoon "Rosa" in early October hit Zhoushan, Xihoumen Bridge was still standing safely with the measured maximum wind force reaching 13. The bridge successfully withstood the test. Based on the construction of Xihoumen Bridge, the feasibility study report of the national science and technology support plan project - "key technology research and engineering demonstration of super long span steel box girder suspension bridge across the sea" has been reviewed by the expert demonstration meeting hosted by the Ministry of science and technology and the Ministry of communications of the people's Republic of China

Chinese PinYin : Zhou Shan Kua Hai Da Qiao