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CCCC scientific and technological achievements support project construction

Seetao 2022-03-15 14:37
  • CCCC's major scientific and technological achievements have formed CCCC's unique core technology competitiveness
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22 Minutes

On March 10, 2022, CCCC held the inaugural meeting of CCCC Science and Technology Association in Beijing and signed a comprehensive strategic cooperation agreement with China Association for Science and Technology. The establishment of the China Communications Science and Technology Association is an important measure of CCCC to implement the SASAC's deployment of strengthening the construction of a "national team" for scientific and technological innovation. It is also a key step for CCCC to build a world-class enterprise with global competitiveness in technology, management and quality.

CCCC actively implements the strategy of "Strengthening the Enterprise with Science and Technology, Innovative Development", insists on facing the frontier of scientific and technological development, facing the construction of major national projects, facing both domestic and international markets, continuously improving the scientific and technological innovation system, steadily enhancing the ability of independent innovation, and constantly breaking through key core technologies. A series of major scientific and technological achievements have been achieved, supporting a number of major projects at home and abroad, and forming CCCC's unique core technology competitiveness. Key technologies such as offshore deep-water ports, offshore island building, deep-water waterways, super-span bridges, super-long tunnels, and highway construction in plateau permafrost areas are world-leading.

Key Technologies for Construction of Offshore Deepwater Ports

The research has overcome a series of key technical problems such as major application basic theory, design, construction and materials encountered in the construction of offshore deep-water ports, solved the problem of insufficient coastline of deep-water ports in China, and met the needs of large-scale development of ships and growth of cargo transportation. The demand has given China the strength to build a port anywhere in the world, making the port of China a new business card of "Made in China".

In the early 1990s, with the rapid development of the shipping industry, the lack of deep-water coastlines and waterways became a bottleneck restricting the development of Shanghai Port. In October 1992, the 14th National Congress of the Communist Party of China made a major strategy of "taking the development and opening up of Shanghai Pudong as the leader, accelerating the construction of Shanghai into one of the international economic, financial and trade centers, and driving a new leap in the economy of the Yangtze River Delta and the entire Yangtze River Basin". decision making. Subsequently, Shanghai took the Yangshan Deepwater Port as the core of the construction of Shanghai International Shipping Center, and built an oriental port.

As the main force in the construction of Yangshan Port, since 1995, CCCC has provided the entire industrial chain from survey and design to reclamation, channel dredging, to the construction of wharf and supporting facilities, to the manufacture and installation of fully automated port machinery and equipment Service, has achieved one breakthrough after another in technology. The scientific and technological project "Key Technology Research of Offshore Deep-water Port Construction" led by CCCC won the first prize of National Science and Technology Progress Award in 2013.

Long-span bridge construction technology and equipment

Based on the forefront of bridge engineering science and technology, give full play to the advantages of CCCC in the whole industry chain, integrate cutting-edge science and technology in related fields, and carry out research and application of achievements in the three major directions of structural safety, intelligent construction and intelligent management of long bridges, forming China's leading bridge in the field of bridges. core competitiveness, and promote the progress of bridge construction technology in the world.

On May 1, 2008, the Hangzhou Bay Sea-crossing Bridge, which was designed by the Public Planning Institute and participated by the First Aviation Bureau, the Second Aviation Bureau, the Third Aviation Bureau, the China Communications Road Construction, and the Sangong Bureau, was completed and opened to traffic, connecting Shanghai to Ningbo. The overland distance was shortened by 120 km. The Hangzhou Bay Bridge is an integral part of the Shenyang-Haikou Expressway and an important part of the urban expressway in the northeastern part of Zhejiang Province. The bridge starts from the Haiyan hub of Jiaxing City in the north, crosses the Hangzhou Bay waters, and ends at the Andong hub of Ningbo City in the south. The total length of the route is 36 kilometers. The bridge deck is a two-way 6-lane highway with a design speed of 100 kilometers per hour. bridge.

The Hangzhou Bay area is one of the world's three major tidal bays with large tidal ranges, rapid flow rates, chaotic currents, high waves, deep erosion, and thick weak strata. Some sections of the seabed also contain shallow biogas, and the construction environment is very harsh. Under the harsh construction environment and intense construction pressure, innovation has become the first choice to improve the progress and construction quality. CCCC builders overcame one worldwide problem after another, obtained more than 250 technological innovation achievements, formed 9 series of independent core technologies, and created a number of "world firsts" at that time. Won the "Luban Prize" for China Construction Engineering.

Underwater tunnel construction technology and equipment

Overcome the technical difficulties in the design, construction and equipment of underwater tunnels, and have a complete set of technology and equipment for the installation of offshore immersed tubes with international leading and independent intellectual property rights. Comprehensively improve the key construction technologies of China's underwater tunnel drilling and blasting method, shield method, tube curtain freezing method, weir construction method and other core construction technologies and underwater tunnel waterproofing technology, and promote the construction technology of China's cross-sea passage and cross-river passage to the forefront of the world.

The main project of the Hong Kong-Zhuhai-Macao Bridge designed and mainly constructed by CCCC consists of a 6.7-kilometer subsea immersed tunnel and a 22.9-kilometer bridge project. There are two artificial islands in the east and west at both ends of the tunnel. Among them, the island tunnel project is the construction control project of the bridge, which consists of three major parts: immersed tunnels and east-west artificial islands. The Hong Kong-Zhuhai-Macao Bridge immersed tunnel is China's first open-sea immersed tunnel, the world's longest highway immersed tunnel and the only deep-buried immersed tunnel, and is currently one of the most difficult immersed tunnels in the world.

The bridge was named one of the "New Seven Wonders of the World" by The Guardian. "Miracles" are the work of confident builders who roll up their sleeves. In the construction of immersed tube tunnels, CCCC builders completed more than 100 experimental studies, developed more than 10 world-leading special equipment and systems, obtained more than 500 patents, and conquered more than 10 world-class installations of offshore immersed tubes. Engineering problem. The steel consumption of the Hong Kong-Zhuhai-Macao Bridge alone is equivalent to 60 Eiffel Towers, which can withstand earthquakes of magnitude 8 and typhoons of more than 16.

The technology of soil road construction in permafrost area

The permafrost highway construction technology is a recognized worldwide problem. Through nearly 50 years of follow-up research, CCCC has broken through the forbidden area of permafrost areas in the international engineering community where asphalt roads cannot be built, filled the technical gap in the world for building asphalt roads in permafrost areas, and established an international leader in China's permafrost engineering research. The leading position demonstrates the technical level of engineering construction in a great country, and greatly enhances and promotes the progress and development of international permafrost engineering.

Plateau permafrost is a soil medium that is extremely sensitive to temperature. The frozen soil in the freezing state in winter will expand violently as the temperature decreases, and in summer, it will melt as the temperature rises, causing the road to collapse and sink. , deformed, cracked, and the car is impassable. In 1973, the former Ministry of Communications decided to set up the Qinghai-Tibet Highway Permafrost Scientific Research Group, led by the then First Highway Survey and Design Institute of the Ministry of Communications (now CCCC No. 1 Public Institute). The figures of three generations of permafrost researchers in Yi Gongyuan remain on the roof of the world.

Permafrost has a huge impact, but changes slowly, and it often takes years or even decades to collect and compare a set of data. The three generations of permafrost researchers who have been passed down from generation to generation have left behind results that shocked the industry and data that a few trucks could not finish. In August 2017, with the support of many years of research and technical achievements of the permafrost research team of the First Public School, the Gonghe-Yushu Expressway in Qinghai Province was completed and opened to traffic, becoming the first expressway in the world to pass through the permafrost area, representing the first time in China to be awarded "Global Outstanding Engineering Award (GRAA) Research and Development Category". In 2021, the Nala Expressway, the world's highest-altitude expressway, will be opened to traffic, laying a strong foundation for China Unicom, an isolated island in the national expressway network. Generations of permafrost researchers have used their lives and wisdom to find the answer to "Tianwen", and the monument of the two-way spirit is shining on the snowy plateau. Editor / Zhao E