Tiejian Heavy Industry Successfully Launches the First Domestic Open Hard Rock Tunnel Boring Machine with Minimum Diameter

On January 14, China's first open-diameter hard rock tunnel boring machine (TBM) was successfully rolled off at China Railway Construction Heavy Industry Group in Changsha, Hunan.

Hard Rock Tunnel TBM (TBM) brings together multi-discipline cutting-edge technologies such as “mechanics, electrical, and hydraulic” and continues to excavate rock layers with a rotating cutterhead to achieve rapid excavation, excavation, and support operations for hard rock formations. "Long" has the characteristics of safety, rapidity, and environmental protection. It has become a weapon for tunnel construction and has been widely used in the construction of highways, railways, urban subways, water conservancy and hydropower, and municipal pipe galleries.

It is understood that this open-ended hard rock tunnel boring machine (TBM) with independent intellectual property rights, excavation diameter of 4 meters, length of 290 meters, weighing about 750 tons, the total installed power of about 2400 kilowatts, will be used for a total investment of 18.05 billion The construction of the water resources allocation project in the northern Hubei Province of Hubei Province, with a total length of 270 kilometers in the yuan and water transmission lines. The complex geological conditions of the project, the narrow tunnel space, the difficulty of manual drilling and blasting operations, and the difficulty in ventilation and material transportation. China Railway Construction Heavy Industries & Construction Group has tailor-made TBM for the project, which is 10.56 kilometers. According to Cheng Yongliang, general manager of China Railway Construction Heavy Industry Group, this open TBM technically overcomes the “small-diameter TBM system integration”, “the arrangement of personnel logistics channels,” “ventilation and dust removal pipe layout” and “small-diameter cutter-disc conjoined knife boxes. "Design" and other problems have the characteristics of fast hole formation, high quality, and safety and environmental protection, and are fully adapted to the project requirements. This is the first time in China that the smallest diameter open TBM is used in tunnel construction.

The successful launch of China's first open-minimum-diameter hard rock tunnel boring machine (TBM) marked the complete upgrading of the independent innovation capability of China's high-end underground equipment manufacturing, and greatly expanded the roadheader in China's engineering field, especially the construction of water conservancy projects. The application enhances the overall competitiveness of “Made in China”.

It is reported that Tiejianzhong is the global provider of tunnel construction equipment and has the largest global product category, the strongest production capacity, and the largest footprint of the tunnel equipment manufacturing base. In recent years, Tiejian Heavy Industry has always focused on the positioning of non-standard, special, customized and personalized high-end underground equipment products, and created three major industrial plates: “boring machine, special equipment and track equipment”, and it takes more than 30% per year. The rapid growth rate has created a miracle in the industry that develops a new product or a new product each week. At present, Tiejian Heavy Industry has built high-end underground equipment manufacturing bases in Changsha, Zhuzhou, Longchang, Lanzhou, and Urumqi. With its core technology and superior research and development capabilities, Tiejian Heavy Industry is leading the way in manufacturing high-end underground equipment in China. Majestic, striding forward in the great journey of building a manufacturing power. (This article comes from the Railway Construction Publicity Brand Division Yu Mingjun Huang Xinglin)