On March 28, the earth pressure balance/single-shield dual-mode TBM "Jianghan Long'an" jointly developed by CRCHI and Sinohydro Bureau 14 Co., Ltd. rolled off the production line in Changsha, Hunan. The equipment will be used in Section 8 of the civil construction and metal structure and electromechanical installation of the Yangtze River-to-Han River Water Diversion Project, and is also the third TBM that CRCHI has provided for the South-to-North Water Diversion Middle Route Project.

Yu Tao, Party Secretary and Chairman of China South-to-North Water Diversion Group Jianghan Water Network Construction and Development Co., Ltd.; Song Zhizhong, Deputy Chief Engineer of Changjiang Survey, Planning, Design and Research Co., Ltd.; Bie Debo, Director of Beijing Haice Engineering Consulting Co., Ltd.; Tang Guanggao, Member of the Party Committee and Deputy General Manager of Sinohydro Bureau 14 Co., Ltd.; and Zhao Hui, Party Secretary and Chairman of CRCHI, attended the event. He Yongjun, Deputy Party Secretary and Deputy General Manager of CRCHI, presided over the rollout ceremony.

"Jianghan Long'an" rolls off the production line, with guests attending the event posing for a group photo

It is understood that the "Jianghan Long'an" rolled off the line this time has an excavation diameter of 12 meters, an overall length of 138 meters, a weight of approximately 3,580 tons, a designed minimum horizontal turning radius of 600 meters, and a total tunneling length of about 11.63 kilometers. It features two modes, earth pressure balance and single-shield TBM, and is the only earth pressure balance/single-shield dual-mode TBM in the Yangtze River-to-Han River Water Diversion Project.

The geological conditions along the Yangtze River-to-Han River Water Diversion Project are complex, characterized by large burial depth, long alignment, large tunnel diameter, numerous faults, and abundant soft rock. To cope with various adverse geological conditions in this section, such as long-distance rock strata, fault fracture zones, and toxic and harmful gases, the CRCHI R&D team carried out innovative research and made targeted designs for the TBM, including long-distance cutterhead tunneling, ultra-high-pressure entrapment release, advanced geological detection and reinforcement, collapse detection, and toxic and harmful gas detection. In addition, according to the construction characteristics of the earth pressure balance/single-shield dual-mode TBM, it is equipped with multiple intelligent technologies such as intelligent tunneling, cutterhead and cutter condition monitoring, intelligent slag fragment identification, digital drilling rig, and advanced detection system, providing strong support for intelligent construction of the project.

"Jianghan Long'an" being debugged in the workshop

It is reported that the Yangtze River-to-Han River Water Diversion Project is the first project to start construction among the follow-up projects of the South-to-North Water Diversion, and is an important landmark project for comprehensively promoting the high-quality development of the follow-up projects of the South-to-North Water Diversion and accelerating the construction of the main framework and major arteries of the national water network. Once completed, the project will provide a strong water security guarantee for comprehensively building a modern socialist country.

On March 28, the earth pressure balance/single-shield dual-mode TBM "Jianghan Long'an" jointly developed by CRCHI and Sinohydro Bureau 14 Co., Ltd. rolled off the production line in Changsha, Hunan. The equipment will be used in Section 8 of the civil construction and metal structure and electromechanical installation of the Yangtze River-to-Han River Water Diversion Project, and is also the third TBM that CRCHI has provided for the South-to-North Water Diversion Middle Route Project.

Yu Tao, Party Secretary and Chairman of China South-to-North Water Diversion Group Jianghan Water Network Construction and Development Co., Ltd.; Song Zhizhong, Deputy Chief Engineer of Changjiang Survey, Planning, Design and Research Co., Ltd.; Bie Debo, Director of Beijing Haice Engineering Consulting Co., Ltd.; Tang Guanggao, Member of the Party Committee and Deputy General Manager of Sinohydro Bureau 14 Co., Ltd.; and Zhao Hui, Party Secretary and Chairman of CRCHI, attended the event. He Yongjun, Deputy Party Secretary and Deputy General Manager of CRCHI, presided over the rollout ceremony.

"Jianghan Long'an" rolls off the production line, with guests attending the event posing for a group photo

It is understood that the "Jianghan Long'an" rolled off the line this time has an excavation diameter of 12 meters, an overall length of 138 meters, a weight of approximately 3,580 tons, a designed minimum horizontal turning radius of 600 meters, and a total tunneling length of about 11.63 kilometers. It features two modes, earth pressure balance and single-shield TBM, and is the only earth pressure balance/single-shield dual-mode TBM in the Yangtze River-to-Han River Water Diversion Project.

The geological conditions along the Yangtze River-to-Han River Water Diversion Project are complex, characterized by large burial depth, long alignment, large tunnel diameter, numerous faults, and abundant soft rock. To cope with various adverse geological conditions in this section, such as long-distance rock strata, fault fracture zones, and toxic and harmful gases, the CRCHI R&D team carried out innovative research and made targeted designs for the TBM, including long-distance cutterhead tunneling, ultra-high-pressure entrapment release, advanced geological detection and reinforcement, collapse detection, and toxic and harmful gas detection. In addition, according to the construction characteristics of the earth pressure balance/single-shield dual-mode TBM, it is equipped with multiple intelligent technologies such as intelligent tunneling, cutterhead and cutter condition monitoring, intelligent slag fragment identification, digital drilling rig, and advanced detection system, providing strong support for intelligent construction of the project.

"Jianghan Long'an" being debugged in the workshop

It is reported that the Yangtze River-to-Han River Water Diversion Project is the first project to start construction among the follow-up projects of the South-to-North Water Diversion, and is an important landmark project for comprehensively promoting the high-quality development of the follow-up projects of the South-to-North Water Diversion and accelerating the construction of the main framework and major arteries of the national water network. Once completed, the project will provide a strong water security guarantee for comprehensively building a modern socialist country.