Tiejian Heavy Industry Tunnel Boring Machine is about to go offline

It is 7 meters in diameter and weighs 135 tons. The huge cutterhead that is being built in the iron construction workshop is the rock tunnel boring machine - the "teeth" of TBM. A roadheader like this can chew 2,800 cubic meters of rock a day and fill an international standard swimming pool.

In China's Tiejian Heavy Industry, the project of “Ultra-long-distance, ultra-long-life open hard rock tunneling machine (TBM) development” is progressing in an orderly manner. The new long-distance TBM will soon be off the assembly line and will be put into the Xinjiang water supply tunnel project to help the west. The regional national economy is developing rapidly and sustainably.

In order to promote the rapid and sustainable development of the national economy in the western region and realize the long-term stability of the society, it is urgent to build a number of inter-basin water transfer projects, and Xinjiang is a key area for the construction of inter-basin water transfer projects in China. Most of these projects need to excavate long distances. Diversion tunnel.

Li Shenyuan, deputy director of the TBM Research Institute of China Railway Construction Heavy Industry Group, told the author that “the average TBM general tunneling distance is 15 km to 20 km, which means that after the tunnel is dug, it is basically scrapped. What we are studying now is Extra long distance boring machine from 20 km to 35 km."

Tiejian Heavy Industry Rock Tunnel Boring Machine

A TBM has a 230-meter-long body, more than 50,000 parts, and the long standby life, which determines that it must go through a long and complicated process. As the first enterprise in China to “eat crabs”, Tiejian Heavy Industry spent more than a year on the research and development team of more than 500 people in order to lay down this hard bone.

“There are more and more long-distance tunnels that need to be excavated now. TBM has to work for 20 consecutive kilometers. Our design life will have to reach 30 kilometers to ensure the completion of the project.” Li Shenyuan introduced that because the distance of the tunneling becomes larger, he All parts are twice as long as the original ones. They are the aircraft carriers in the construction machinery industry. They are the most difficult, including mechanical, electrical, hydraulic, etc., involving a wide range of disciplines.

It is understood that as early as the end of 2014, the first domestically-developed independent intellectual property rights open TBM was launched in Changsha's Tiejian Heavy Industry, ending the history of China's large TBM application country but unable to design and manufacture large-diameter TBM. Up to now, Tiejian Heavy Industry has occupied 85% of the domestic market share, and the domestic TBM production capacity has reached more than 5 billion yuan, driving the domestic upstream and downstream supporting output value to exceed 1 billion yuan.

At present, Tiejian Heavy Industry has formed a production base mainly based on Changsha headquarters, with Lanzhou, Urumqi, Xi'an, Baotou and many cooperative factories across the country, with an annual production capacity of 260 units, the largest in China. The self-developed shield machine has occupied half of the domestic market for four consecutive years; TBM and large-diameter shield machines with a market share of more than 85% have become the first domestic brands, and are widely used in more than 30 provinces and cities in China. Key projects such as railways, coal mines and water conservancy.