November 1

Organized by China State Railway Group Co., Ltd.

On-site teaching of the senior railway construction management training program

Visited the Yangtze River Tunnel project

of the Chongqing-Qianjiang Railway, constructed by China Railway 14th Bureau Group

Wang Tongjun, Vice General Manager and Party Leadership Group Member of China State Railway Group, relevant heads of the Construction Management Department and the Engineering Management Center, construction supervisors of all railway bureau groups across the network, and principal leaders of railway companies, totaling more than 100 people, participated in the event. Wu Yankun, Party Secretary and Chairman of China Railway 14th Bureau Group; Li Fangdong, Vice General Manager; Li Qingmin, Vice General Manager and Chief Engineer; and Xue Feng, leader of the Group Company, accompanied the visit.

During the visit, Wang Tongjun and his delegation successively went to the project's information center, physical display area, assembly cavern, shield tunneling construction site and other locations to gain an in-depth understanding of the project overview and key difficulties, the working principles of the shield machine, construction techniques, comprehensive information management, and technological innovation. The delegation spoke highly of a series of advanced technologies and research and development achievements, including the large-slope inclined shaft transportation plus in-tunnel assembly and disassembly scheme and the comprehensive information management platform, and affirmed the concepts of 5S management, SOP standard operating procedures, and TPM refined equipment management adopted by the project.

The Chongqing Yangtze River Tunnel is located in Yuzhong District and Nan'an District of Chongqing. It is a controlling project of the Chongqing-Qianjiang section of the Chongqing-Hunan High-Speed Railway, the first high-speed railway tunnel crossing the Yangtze River in the upper reaches of the Yangtze, and the first high-speed railway shield tunnel crossing the Yangtze River. It is known as the "No. 1 High-Speed Railway Tunnel Under the Yangtze River" and features the complex characteristics of crossing mountains, cities, rivers and water bodies. It passes through complex geological structures, traverses unfavorable geology over long distances, and repeatedly crosses water-rich karst sections. The large-slope inclined shaft transportation of the shield machine and the in-tunnel hoisting construction are highly difficult and carry high safety risks.

Responsible personnel from the Chongqing-Guizhou Regional Headquarters, the Fourth Company, and the Large Shield Tunneling Company of China Railway 14th Bureau Group participated in the visit.

Technological Innovation + High-Standard Management

The No. 1 High-Speed Railway Tunnel Under the Yangtze River Is "Unique"

Feature One: Digital Management

Relying on a technical research and development platform integrating "two stations, two institutes, one laboratory and one association," the project has built a comprehensive information management platform covering six major modules: participating units, progress management, equipment and maintenance management, digital shield tunneling, the China State Railway Group engineering management system, and safety and quality management.

Feature Two: Technological Innovation

During construction, based on the project characteristics, the project department innovatively adopted the large-slope inclined shaft transportation plus in-tunnel assembly and disassembly scheme. For the first time in China, a large-diameter shield machine was hoisted, assembled, launched, tunneled, received and disassembled inside a mountain cavern, filling a gap in the industry.

Feature Three: "Standardized + Refined" Management

The project actively promotes "standardized + refined" management and proactively introduced management procedures such as 5S management, SOP and TPM, better ensuring safe and efficient shield tunneling and effectively applying the principles of "normalized civilized construction, factory-style site management and standardized construction operations" on the construction front line.

Feature Four: Application of Technological Innovation Achievements

In recent years, relying on its construction experience in large-diameter shield tunneling projects, China Railway 14th Bureau Group has innovatively developed and applied an intelligent cutterhead welding robot, a test platform for simultaneous dual-liquid grouting during shield tunneling, a green intelligent production line for super-large-diameter shield tunnel segments, and socket-type segments, effectively improving project quality and construction efficiency, ensuring process standardization and saving construction costs.

Supporting high-quality development with technological innovation

Building benchmark projects with high-standard management

The Chongqing-Qianjiang Railway project

will continue to deeply advance standardized site management

With high standards and high quality

It is committed to building an ecological railway

and a premium project in the difficult and dangerous mountainous areas of Southwest China