China's shield machine is increasingly widely used in underground engineering, and the spectacular scene of 52 shield machines being constructed at the same time has added luster to the development of China's manufacturing industry. The shield machine not only plays a key role in urban underground construction, but also makes great achievements in technological innovation. The 52 domestic shield machines built by China Railway Construction Heavy Industry Co., Ltd. formed a shield construction machine group to participate in the tunnel construction of Guangzhou Metro Line 18 and Line 22, showing China's leading position in the world.
In the face of the severe test of geological conditions, the technological innovation ability of China's shield machine has been perfectly demonstrated. The development of the refrigerated cutterhead offers an innovative solution for dealing with alternating hard and soft geology. In addition, the localization of key components such as the main bearing, motor and reducer of the domestic shield machine has also greatly enhanced the core competitiveness of China's shield machine. First of all, the application scale and technical level of China's shield machine in underground engineering have reached the world's leading position.
The spectacular scene of the simultaneous construction of 52 domestic shield machines not only shows the scale advantage of China's shield machines, but also demonstrates China's strength in the field of shield machine manufacturing. Especially in the tunnel construction of Guangzhou Metro Line 18 and Line 22, the technical level of China's shield machine is even more eye-catching. In the face of severe challenges such as the numerous underground urban buildings, the criss-cross of the underground municipal pipe network, and the complex geological conditions, China shield machine has shown its status as the "king of construction machinery" with its excellent performance and innovative solutions. Secondly, China's shield machine has performed well in technological innovation. The development of the refrigerated cutterhead provides an innovative solution for dealing with alternating soft and hard geological conditions, freezing the soil layer into a shell-like safe body, and then excavating the rock formation, effectively coping with the complex geological conditions. At the same time, in view of the problems such as cutterhead mud cake, the R&D team is equipped with an intelligent perception system for the cutterhead tool status to monitor the cutterhead temperature and tool wear status in real time, and assess the risk of cutterhead mud cake in advance. These technological innovations not only improve the construction efficiency of China's shield machines, but also provide strong support for tunnel engineering under complex geological conditions. In addition, the localization of key components of China's shield machine has also injected strong impetus into the development of China's shield machine. The localization of main bearings, motors and reducers not only reduces procurement costs and saves equipment delivery cycles, but also fills the domestic gaps in key technologies. The main bearing of the world's largest diameter and the heaviest monomer was rolled off the assembly line in Changsha, pushing the manufacturing level of key parts of China's shield machine to the world's leading level. In addition, the research and development of domestic motors and reducers has also achieved technological breakthroughs, which not only improve work efficiency, but also greatly reduce costs, laying a solid foundation for the further development of China's shield machine. The development achievements of China's shield machine not only reflect the strength of China's manufacturing industry, but also win more international discourse rights for China in the field of underground engineering. In the future, with the continuous rise of China's manufacturing industry and the continuous advancement of technological innovation, it is believed that China's shield machine will definitely show a more brilliant future.