Yang Jie also hopes to increase the production and sales of Huaxing Construction Machinery in shield machines to 100 units or even higher per year within ten years, and he is very confident in this.

Like the hard rock tunnel boring machine developed by Huaxing Construction Machinery is suitable for hard rock geological formations, suitable for railways and highways such as mountain tunnels and tunnel water diversion projects, integrating excavation, support and slag removal, which can realize the one-time forming of the tunnel, which has extremely high requirements for the reliability and long life of the equipment, and is also the crown jewel of the tunnel boring machine, the high cost is normal, and the output is not too large.

The volume of the shield machine is mainly suitable for soil, sand and other soft strata of the slurry shield machine, this is also the area that Ishikawajima Construction Machinery was good at before, and it has also launched a lot of products before.

Compared with the subway shield machine with a diameter of 6.2 meters, Huaxing Construction Machinery is also preparing to launch a micro shield machine with a diameter of 3 meters, mainly for the pipe network construction projects of domestic cities.

At present, the construction of underground pipe corridors in domestic urban construction usually adopts the "disembowelment" type of open excavation.

Cut-and-cover construction occupies the road to affect traffic traffic, and because the pipe network is buried in a shallow depth, resulting in pipeline accidents such as water pipe bursts, gas leakage, power and communication interruptions, so the road construction in the urban center of the country can only be partially relocated to the pipeline, and the construction period of each pipeline unit is different, often forming the "pull link" phenomenon of repeated excavation.

The micro shield machine operates underground throughout the whole process, which avoids the open cut of the area along the line and changes the construction method of "disemboweling" the road.

After the construction of the pipe network with the underground pipe gallery, the special line is dedicated, and at the same time the pipe network is buried deeply, the pipe network can be overhauled independently, avoid "kicking" with other pipe networks, minimize the relocation of pipelines, and then reduce the repeated excavation of the road and crack the embarrassment of pulling the link.

In addition to the shield shaft will occupy the sidewalk and the green belt, the construction scope is mainly located under the non-motorized lane and the sidewalk, which basically does not affect the traffic flow of the main road.

The domestic comprehensive pipe corridor is now only a few cities such as Emperor City, Jinshan City and so on have built a comprehensive pipe gallery, and the mileage of construction is very small.

The main reason is that there are different departments with their own interests and the law is not sound in this area, and there is no unified body to coordinate, and these municipal units repeatedly carry out excavation construction in urban construction.

In fact, in this regard, the neon country has been using shield machines to carry out underground construction to build a comprehensive pipe network since the seventies and eighties of the last century, and Ishikawajima Construction Machinery Company not only produces equipment in this area, but also has extremely rich experience in engineering construction.

Now Huaxing Construction Machinery will give Ishikawajima Construction Machinery to the acquisition, and it is naturally impossible to use this experience and technology.

Even if the national level does not explicitly implement the construction of the integrated pipe network for the time being, the domestic urban construction is in full swing, compared with the open cut method, the construction cost of the shield method is more economical, and the construction efficiency will be increased by more than 2 times.

Therefore, Huaxing Construction Machinery Technology Co., Ltd. is also designing a shield machine of this size after conducting market research.

Originally, the company wanted to directly use the design scheme that Ishikawajima had before, but now these companies that produce shield machines in Neon Country do not allow Huaxing Construction Machinery to use their products and technologies anymore, and Huaxing Construction Machinery has to redesign.

The micro shield is still being designed, and the design team demonstrated to Yang Jie a simulation of the shield machine working underground.

"Could the Microshield that you designed be able to advance 10 meters per day even more?"

Yang Jie looked at it for a while and then spoke.

Although the design index of this micro shield machine is that it can excavate more than 10 meters per day, and the maximum tunneling speed is 400 meters per month, which is at least 4 times higher than that of manual excavation, and greatly shortens the construction period, Yang Jie still feels not satisfied.

Mao Tsuka Tehiko glanced at Xu Guang at this time.

"Yang Shao, if the shield machine tunneling speed is too fast, the later assembly machine and assembly method are also to be improved, we are still carrying out research and development in this area, and the technology is not mature......"

Xu Guang said.

Yang Jie nodded: "Then these technologies will be used in the improved type." ”

Later, he also learned about the estimated cost of this micro shield machine, and learned that the cost of this shield machine with a total length of more than 80 meters was about 20 million, and he also nodded.

Although the cost of such a micro shield machine is more than 20 million, the cost of the municipal unit to relocate the route in the traditional way is much higher than this, and such a micro shield machine can also be reused.

Tianhong Real Estate Group Co., Ltd. also ordered several 10-meter slurry shield machines directly from Huaxing Construction Machinery, which is prepared for the undersea tunnel between XG Island and artificial island, and Yang Jie is also aware of the progress in this regard.

At present, the artificial island being built by Tianhong Real Estate Group is almost 10 kilometers away from XG Island, and Tianhong Real Estate Group is also preparing to use the shield method to build an undersea tunnel to connect the two.

The average depth of the seabed on the XG side is about 37 meters, and the undersea tunnel must be excavated at least 50 meters below the seabed.

However, if the shield machine was used to excavate the submarine tunnel, the space excavated behind the shield machine would immediately be collaged on the wall of the tunnel by arc-shaped cement segments, and the tunnel would be formed, but because of this, the shield machine could not retreat, and could only drill forward.

The previous construction was that two shield machines were working opposite each other at the same time, and these two shield machines were destined to never see the light of day again.

When they were about to join the division, they tilted their heads and burrowed into the tunnel next to them, and the remaining sections would not be used, and the TBMs were then permanently sealed in the cul-de-sac next to the tunnel.

Such a shield machine is hundreds of millions of equipment, and it is really a waste to see the light of day like this.

Yang Jie thought for a while and said to Mao Tsuka Tehiko and others: "I think these shield machines ordered by Tianhong Real Estate Group still need to be redesigned to maximize the recycling and reuse of shield machines. ”

"Yang Shao, the other parts are relatively easy to dismantle, but the narrow tunnel can't fit the crane. Because the cutterhead weighs 90 tons with the teeth, the heaviest piece to be moved for disassembly is more than 30 tons, and if there is no crane, dismantling and handling are difficult problems. ”

"Then design a machine that can remove the cutterhead in the tunnel. Yang Jie said.

"Yang Shao, the undersea tunnel is often 40 degrees Celsius high temperature, and the disassembly machine has to use flame cutting, smoke and fire, which is quite dangerous......"

"Then do not use flame cutting equipment, use high-power laser cutting equipment, and the high-power laser technology developed by our Huaxing Group is also very suitable for this. ”

Yang Jie said: "My requirement is that most of the more than 14,000 parts of the shield machine must be safely dismantled, packed and shipped back to the company to continue to assemble and use, like the shield shell that supports the tunnel wall can not be removed to stay in the tunnel to make the inner wall, and the other components are dismantled and shipped out one by one." ”

He looked at Mao Tsuka, Xu Guang and the others and said, "I know that no one has done this before, but I can't afford to waste it, so I have to work hard for you experts to re-design and develop." ”

“......”

Tehiko Geruzuka and others looked at each other, wanting to dismantle the shield machine with such a large cutterhead diameter, a total length of more than 100 meters, and a weight of about 1,500 tons, and transport it to the ground several kilometers behind them, which was really unheard of, and it was also a huge challenge for them, and of course, it was also a major innovation.