The total length of the bridge is 36 kilometers, which makes it surpass world famous bridge such as Chesapeake Bay Bridge and Bahrain Embankment Bridge in the United States, and become the longest sea-crossing bridge built or under construction in the world.
According to preliminary verification, the bridge * * * needs 769,000 tons of steel, cement 1.29 1.000 tons, petroleum asphalt 1.65438 tons, wood 1.9 1.000 cubic meters and concrete. The 50-meter * 16-meter box girder in Nantan adopts the technology of whole-hole prefabrication and large-scale flat car transportation, which sets a new record for transporting heavy beams at home and abroad.
The 70m * 16m box girder of the approach bridge in the underwater area adopts the integrated scheme of full-hole system, transportation and erection, and the single girder weighs 2 180 tons, ranking first in China. The diameter of steel pipe piles driven into the approach bridge in the underwater area is 1.5- 1.6m, and the pile length is about 80m, totaling more than 4,000 steel pipe piles, which is the highest in the history of bridge construction in China.
The concept of landscape design was first introduced into the design of this bridge. With the help of the aesthetic concept of "Long Bridge Lying on the Wave" in Su Causeway of West Lake, the landscape designer determined the general layout principle of the bridge in combination with the hydrological environment characteristics of Hangzhou Bay and the psychological factors of drivers and passengers while driving. The plane of the whole bridge is S-shaped curve, and the overall linear shape is beautiful and lively. Viewed from the side, the navigation hole bridge of the North-South Waterway is arched and has an undulating elevation shape.
1.7km south of Nanhang Road, about 14km from the south bank, there is an offshore platform with an area of1.2000 square meters. During the construction period, the platform will serve as a living base for offshore operators and a platform for maritime rescue, survey, communication and maritime monitoring. After the completion of the bridge, this platform in the sea is a rescue platform for maritime traffic services and an excellent sightseeing platform for tourism and leisure.
The high technology content is first reflected in the construction technology. We insist on respecting science and relying on experts to carry out extensive technical consultation and exchange activities. According to experts' opinions, the construction decision-making design is put forward, and the construction scheme of prefabrication, factory, large-scale and offshore construction changing into onshore construction is adopted, which breaks through the long-standing concept that design determines construction. The largest component for precast hoisting is a prestressed concrete box girder with a length of 70m, a width of16m, a height of 4.0m and a weight of 2180t, and the longest component is an ultra-long steel pipe pile with a length of 84m and a diameter of1.6m, which is called chinese odyssey. In order to reduce the corrosion of chloride ions in seawater on bridge reinforcement and concrete and ensure the service life of the bridge 100 years, the designer has specially formulated an effective scheme to prevent seawater corrosion. Wait, we can see the high-tech content of bridge engineering.
Hangzhou Bay Bridge will be a "digital bridge". Scientific research units will use hardware and interface technology, network and database technology, image graphics technology, artificial intelligence technology, computational mathematics, finite element technology, mechanics and other disciplines to establish a scientific evaluation system for bridge design, construction and maintenance. The whole bridge will be equipped with a central monitoring system, and 1 km monitors will be installed on average. In this way, not only can the bridge be scientifically and reasonably maintained and managed, but also the health status of the bridge can be grasped in real time. At present, this project has applied to the Ministry of Communications for the key scientific research project of bridge engineering 17, which is also rare in the domestic bridge industry.
Hangzhou Bay Bridge is the first national super-large transportation infrastructure project with local private enterprises as the main body and investment exceeding 10 billion. The capital of the bridge is 3.85 billion yuan, of which private capital accounts for more than 50%. * * * There are 17 private enterprises in the province, which have invested in shares with the increasing economic strength. It can be said that the investment system and construction mode of the bridge project have made positive and beneficial explorations in broadening the investment field of private capital, establishing an investment model combining private capital with state-owned capital, and realizing the "win-win" operation mechanism between the government and enterprises.
Hangzhou Bay, located in the Yangtze River Delta, is the most dynamic and economically developed area in China. The construction of Hangzhou Bay Bridge has far-reaching strategic significance for the economic and social development of the whole region.
1. directly promotes the economic and social development of Ningbo and Jiaxing, and promotes the development of surrounding areas such as Hangzhou, Shaoxing, Taizhou, Zhoushan and Wenzhou, which has a positive impact on the overall development of the whole province and even the southern wing of the Yangtze River Delta. According to statistics, the GDP of Hangzhou, Ningbo, Wenzhou, Shaoxing and Taizhou accounts for more than 70% of the province. The project construction will make the development of these areas even more powerful, inject new vitality into the further development of regional economy and society, and play a greater role in improving the overall comprehensive strength of the province. The bridge project has not been fully started, and the "bridge economy" has been surging in Cixi City, Yuyao City and Haiyan County of Jiaxing on both sides of Hangzhou Bay. On the basis of scientific planning of the new area, the first phase of development presents a booming scene, and investors have settled here.
2. Actively connect with Shanghai to open wider to the outside world, promote cooperation and exchanges in the Yangtze River Delta region, and further enhance the comprehensive competitiveness and international competitiveness of our province. As the largest economic center city in China, Shanghai is an important platform for China's internationalization. In the new century and new stage, Ningbo should build a modern international port city and achieve great economic development and leap forward. It is necessary to integrate with Shanghai, integrate into the Yangtze River Delta and move towards internationalization. The construction of the bridge will greatly shorten the time and space distance between the southeast coast of Zhejiang and Shanghai, and make our province integrate into the international metropolis economic circle in a larger scope, at a higher level and with superior location advantages. This has a far-reaching positive effect on radiating the vast hinterland of our province, optimizing and upgrading the industrial structure, improving the investment and development environment, attracting foreign investment and improving comprehensive competitiveness. The construction of Hangzhou Bay Bridge will create more favorable conditions for optimizing the development environment and further attracting and utilizing foreign capital.
3. It is conducive to promoting the urbanization development strategy. The construction of the bridge will further strengthen the links between Jiaxing, Ningbo, Shaoxing and Taizhou, promote the formation of Hangzhou Bay urban continuous belt and coastal open plate in our province, and make this area an important part of the internationally competitive metropolitan group led by Shanghai. At the same time, the construction of the bridge will also have a far-reaching impact on the urbanization development of surrounding counties and cities. Cixi, Haiyan and other places aim at this once-in-a-lifetime strategic opportunity, have scientific planning ideas, attract population and industry gathering, and promote the rise of new districts and new cities.
4. As the first cross-sea bridge in China coastal corridor, it broke through the bottleneck of Hangzhou Bay, optimized the layout of national trunk road network, changed the situation of Ningbo's transportation hub, facilitated the implementation of the regional development strategic network around Hangzhou Bay, and greatly enhanced the competitiveness of Ningbo, an economic center city with great development potential. The construction of the bridge is also conducive to supporting the construction of Shanghai international shipping center, promoting the integrated development and utilization of Ningbo and Zhoushan deep-water port resources, promoting the development of tourism and national defense construction, and alleviating the traffic pressure of Hangzhou transit (Shanghai-Hangzhou-Ningbo Expressway).
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