en.Wedoany.com Reported - From May 25 to 27, Li Qiang, Member of the Standing Committee of the Political Bureau of the CPC Central Committee and Premier of the State Council, conducted an investigation in Zhoushan and Ningbo, Zhejiang Province. He emphasized the need to thoroughly implement General Secretary Xi Jinping's important expositions and instructions on building a major national reserve system, adhere to government leadership, social co-construction, and diversified complementarity, manage the reserve and regulation of bulk commodities and important materials well, strengthen the functions of strategic support, macro-control, and emergency response, continuously enhance the resilience of industrial and supply chains, and accelerate the construction of a hub for bulk commodity resource allocation, providing reliable guarantees for coordinating development and security.
Li Qiang visited the Ningbo section of the Jintang Undersea Tunnel on the Yongzhou Railway and the Meishan Port Area of Ningbo Zhoushan Port to inspect the planning of Zhejiang's transportation and logistics system and understand the transportation and processing of bulk commodities. At the tunnel construction site, Li Qiang observed the boring and laying operations and fully affirmed the construction team's efforts in strengthening equipment research and development and overcoming technical challenges. He stated that upon completion, the Yongzhou Railway will end the history of the Zhoushan Islands being inaccessible by rail. Given the complex geological conditions and high construction difficulty of the Jintang Undersea Tunnel, it is essential to adhere to scientific, safe, and green construction, actively apply new technologies, new equipment, and new materials, integrate quality control throughout the entire construction process, and build a high-quality project that can withstand scrutiny.
The Jintang Undersea Tunnel project of the Yongzhou Railway investigated this time is a key practical project for China Railway Construction Corporation (CRCC) to implement the important directive of "marching into the deep earth." China Railway Siyuan Survey and Design Group Co., Ltd., a subsidiary of CRCC, undertook the project design; China Railway 11th Bureau Group Co., Ltd. and China Railway 14th Bureau Group Co., Ltd. are responsible for construction; and China Railway Construction Heavy Industry Corporation Limited is responsible for equipment manufacturing and other tasks, focusing on full industry chain service capabilities to create a model project for overcoming challenges in undersea tunnel construction.
This tunnel is a controlling and major challenging project for the entire Yongzhou Railway line. Starting from Yinzhou District, Ningbo in the west and ending in Jintang Town, Zhoushan in the east, it has a total length of 16.18 kilometers, with a shield tunneling section of 11.21 kilometers, making it the world's longest undersea high-speed railway tunnel. The project uses two domestically produced super-large diameter shield machines ("Yongzhou" and "Dinghai," with an excavation diameter of 14.57 meters), which were launched from Ningbo and Zhoushan respectively, boring towards each other and ultimately achieving precise docking under the seabed.
During construction, the builders strictly implemented the "Ten Rigorous Measures" for work safety issued by the State-owned Assets Supervision and Administration Commission of the State Council, firmly upholding the safety baseline. To overcome technical challenges, the team independently developed China's first shield machine saturated hyperbaric entry equipment, the "Deep Sea Space Station," achieving full localization of core equipment and technology, filling a technological gap in related fields in China, and accumulating valuable technical experience for the construction of high-water-pressure, long-distance strait tunnels in the country.
Upon completion and operation, the Yongzhou Railway will have profound significance for promoting the integration of Ningbo and Zhoushan, helping the two cities deeply integrate into the "Belt and Road" initiative and the Yangtze River Economic Belt development, and accelerating the integrated development of the Yangtze River Delta.
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