TBM (TunnelBoringMachine, hard rock tunnel boring machine) as the country's heavy weapon, its core technology has been monopolized by foreign countries for more than a century, and the domestic market has long been dominated by foreign manufacturers. After nearly 20 years of technology precipitation, China has independently designed TBM for the first time. After the shield, it once again broke the monopoly of foreign technology. Dahe reported that the TBM will be off the assembly line in Zhengzhou at the end of this year or early next year.
TBM global bidding, domestic enterprises won the bid for the first time
In January of this year, the TBM construction of the Jilin Water Supply Project was open to the public.
In the past, the bidders were all “solo dances†of foreigners. Today, they have one more dance partner – China Railway Engineering Equipment Group Co., Ltd. (China Railway Equipment).
After many expert reviews, multiple optimizations, and multiple communication with the owners, on the stage of global bidding, China Railway Equipment's plan competed with well-known foreign manufacturers. After the evaluation of the owners and experts, it finally won the first in China. Taiwan-made TBM orders.
He Fei, director of the China Railway Equipment TBM Research Institute, said: Because there are no construction cases, many owners have doubts about domestic equipment and do not hesitate to import foreign equipment at high prices. The night is over, the plan has been done, and the bidding has been made, but it often sinks into the sea, and it is not a long-term investment. Is it abandonment or continued?
On the one hand, China has become the country with the greatest demand for TMB. On the other hand, foreign technology monopoly has led to high market prices. Since 2011, China Railway Equipment has started to independently develop TBM. "From the introduction of equipment, to their own transformation and maintenance, to joint production, and then to independent research and development." He Fei said that this is the domestic TBM research and development process.
The first "king machine" will be off the assembly line in Zhengzhou
Take the train through the mountains and take the subway to the city. These huge tunnels are built thanks to the giant pangolin, the tunnel boring machine, which contains the shield and TBM. In China, it is customary to refer to tunnel boring machines used in soft soil layers as shields and TBMs to be used in rock formations. It uses high-tech achievements in the fields of machinery, electrical and hydraulics. It is a complete set of equipment integrating excavation, support, slag discharge and transportation. He Fei said that according to relevant regulations, TBM construction is preferred for tunnels longer than 10 kilometers. Compared with traditional drilling and blasting methods, TBM is fast, high quality, economical, safe, environmentally friendly, automated, and highly informative.
“TBM is called the king of the roadheader. If an equipment manufacturer only has the production capacity of the shield and cannot produce TBM, it means it is not strong enough.†He Fei told the author that in March this year, China began to design TBM independently. At present, China Railway Equipment Co., Ltd. is producing the first self-designed TBM in China in the Zhengzhou workshop. It is expected to be off the assembly line in Zhengzhou at the end of this year or early next year.
Compared with the shield, the TBM is more technically difficult, and the cost and size are three to five times that of the shield. Last year, the world's largest rectangular shield independently developed by China Railway Equipment has been successfully applied to the construction of the Zhongzhou Avenue in Zhengzhou City, opening the precedent for the construction of domestic municipal roads.
In the next decade, domestic TBM demand is huge
The first TBM introduced in China was used in the Qinling Tunnel of Xikang Railway in 1997, when the market price was 260 million yuan. At present, there are 30 TBMs in China, which are completely imported from abroad. Most domestic manufacturers undertake the processing tasks of some structural parts, and do not involve core manufacturing technology. Last year, China Railway Equipment acquired Germany's Wilter Company and became the No. 1 and No. 2 boring machine manufacturer in the world. In March this year, it began to design TBM independently.
Previously, in April 2008, China's self-developed and designed “China Railway No. 1†shield was successfully applied to the construction of Tianjin Metro in the new countryside line in Henan, filling a major gap in the field of composite shield manufacturing in China, breaking the “foreign†Shield" dominates the situation of the world.
The more technically difficult TBM, on the basis of the shield, has taken a step forward. It is estimated that the first domestic TBM market with independent intellectual property rights will sell for more than 150 million yuan, which is at least 50 million cheaper than imports. Due to the price advantage, China Railway Shield has become a representative of Chinese equipment in the domestic market, and foreign brands have gradually withdrawn from the Chinese market. In addition, under the monopoly of technology abroad, there are often phenomena such as untimely service and high price of accessories.
At present, China is the country with the largest demand for TBM, accounting for 50% of the world. At present, the economic development needs of the western, southwestern and mountainous areas of China, the construction of infrastructure such as railway transportation, highway transportation, water conservancy and hydropower, and large-scale water transfer projects have been fully rolled out, large-diameter, large-buried deep and long-distance full-section tunnel engineering. TBM construction is increasingly being used,
“In the next ten years, the domestic market demand for TBM is huge.†An industry source pointed out that the demand for roadheaders in the domestic market will reach 250 units in the future.
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