In the world, the railway and highway construction are one of the great trump cards in China's manufacturing, and in the construction of the railways and highways, it is not enough to dig the rocks and excavate the tunnels.
Generally speaking, shield machines are used to solve this problem. Shield construction safety, environmental protection, minimal impact on the existing buildings on the ground, in the railway and highway tunnel excavation stage of the role is very important. Although China's shield technology is extremely high, it has lagged far behind the west a decade ago. At that time, the market share of large shield machines was basically occupied by professional companies in the United States, Japan, Europe and other countries.
With the technical blockade, the price of imported shield machine is high and the quantity is very small. The shortage of machinery has made our infrastructure difficult, but China has never flinched. We set up a research group on its own. In a few years, the shield machine technology has been carried out in the world, especially the "Zhongyuan No. 1 shield machine", which not only fills the gap in the development and application of the ultra large diameter driving equipment in our country, but also is unprepared in the western countries. Compared to the imported shield machine, the technology of "Zhongyuan No. 1" is more advanced and lower in cost. At least 20 million cheaper than imported machines, and the price ratio is very high. Even in the Yuji intercity railway project, it is amazing that the technical difficulties of homework are numerous.
