China Railway Equipment will design and manufacture China's largest diameter shield machine

The author recently learned from Zhengzhou Economic Development Zone China Railway Equipment Group that the group has recently won the bid for the shield purchase project of the Shenzhen Spring Breeze tunnel project. The winning bidder is a slime-balanced shield machine with an excavation diameter of about 15.8 meters, a total of about 4,300 tons, and a length of about 140 meters. This will be the largest diameter slurry balance shield machine independently designed and manufactured in China by far. It will break the situation that foreign brands have unified the world's super-large-diameter shields over the years, which indicates that the design and manufacture of China's Shield Machines will go toward high-end, and it is fully occupying the commanding heights of the world's roadheaders.

It is understood that the large-diameter slurry-balanced shield machine has the characteristics of small impact on the surrounding environment and high degree of industrialization. It has unique advantages in the construction of a series of cross-river and cross-sea tunnels in China and is a key development in the “Made in China 2025” plan. High-end equipment. Previously, the core technology of the ultra-large diameter slurry balance shield machine has been monopolized by a few developed countries. In order to change this situation, the China Iron and Steel Equipment Group has an advantageous R&D team that has broken through many core technologies. This equipment integrates the five major innovations of ultra-high pressure capacity system integration design, atmospheric pressure tool changer technology, telescopic swing type main drive technology, dual air pressure control technology, and high degree of intelligence to fill domestic large diameters. Slurry balance shield machine developed blank.

The Spring Breeze tunnel project is one of the major transportation projects in Shenzhen's “Eastward Strategy”. The construction party of the project is the China Railway Tunnel Group. The tunnel will span Shenzhen Futian and Luohu Districts, with a total length of approximately 5,078 kilometers, including a total length of 3,583 kilometers. (Zhang Qian)