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Chapter 1104 Major innovation!

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    Yang Jie also hopes to increase the production and sales of Huaxing Construction Machinery's shield boring machines to 100 units or more per year within ten years. He is very confident about this.

    The hard rock tunnel boring machine developed by Huaxing Construction Machinery is suitable for hard rock geological strata, railways and highways such as mountain tunnels, and tunnel water diversion projects. It integrates excavation, support, and slag removal, and can realize tunnel construction.  One-time molding has extremely high requirements on the reliability and long life of the equipment. It is also the crown jewel of the tunnel boring machine. It is normal for the cost to be high, and the output will not be too large.

    ??The most popular shield machines are mainly mud-water shield machines suitable for relatively soft strata such as soil and sand. This is also an area that Ishikawajima Machinery has been good at before, and it has launched many 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 pipe network construction projects in domestic cities.

    Nowadays, the construction of underground pipe corridors in domestic urban construction usually adopts the "open-and-open" method.

    Not only does open-cut construction occupy roads that affect traffic flow, but also because the pipeline network is shallowly buried, pipeline accidents such as water pipe bursts, gas leaks, and power and communication interruptions occur. Therefore, road construction in central urban areas in China can only partially relocate pipelines.  The construction period of each pipeline unit is different, which often results in the phenomenon of "zipper link" with repeated excavation.

    ??The micro-shield machine operates underground throughout the entire process, avoiding open excavation of areas along the line and changing the "eviscerating" construction method of the road.

    After constructing the pipe network with underground pipe galleries, dedicated lines are dedicated and buried deep underground. The pipe network can be inspected and repaired independently, avoiding interference with other pipe networks, minimizing pipeline relocation, and thus reducing repeated excavation of roads.  Cracking the zipper path is awkward.

    In addition to the shield shaft occupying two lanes of sidewalks and green belts, the construction scope is mainly located under non-motorized lanes and sidewalks, which basically does not affect the traffic on the main road.

    So far, only a few cities such as Imperial City and Jinshan City have integrated pipe corridors in China, and the mileage of construction is very small.

    The main reason is that different departments have their own entangled interests and the laws in this area are not perfect. There is no unified agency to coordinate. These municipal units repeatedly carry out excavation and construction during urban construction.

    In fact, in this regard, Neon Country has been using shield boring machines to carry out underground construction to build comprehensive pipe networks since the 1970s and 1980s. Ishikawajima Construction Machinery Company not only produces equipment in this area, but also in engineering construction.  The experience is extremely rich.

    Now that Huaxing Construction Machinery has acquired Ishikawajima Construction Machinery, it is naturally impossible not to use this experience and technology.

    Even if the national level has not yet explicitly implemented the construction of integrated pipe networks, domestic urban construction is in full swing. Compared with the open-cut method, the shield method is more cost-effective in construction, and the construction efficiency will be increased by more than 2 times.  .

    So Huaxing Construction Machinery Technology Company is also designing a shield machine of this size after conducting market research.

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

    This miniature shield machine is still under design, and the design team also demonstrated to Yang Jie the simulation animation of this shield machine's underground construction.

    "Can the speed of the micro-shield boring machine you designed, which can dig 10 meters per day, be increased?"

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

    Although the design index of this micro-shield machine is that it can tunnel more than 10 meters per day and has a maximum tunneling speed of 400 meters per month, which is at least 4 times higher than manual digging and significantly shortens the construction period, Yang Jie still feels dissatisfied.

    Maozuka Tehiko glanced at Xu Guang at this time.

    "Mr. Yang, if the shield machine digs too fast, the subsequent assembly machines and assembly methods will also need to be improved. We are still conducting research and development in this area, and the technology is not yet mature"

    Xu Guang said.

    Yang Jie nodded: "Then let's use these technologies on the improved version."

    ¡° Then he also learned about the estimated cost of this miniature shield machine. When he learned that the total length of this shield machine, which is more than 80 meters long, costs around 20 million, he nodded.

    Although the cost of such a micro-shield boring machine is more than 20 million, the cost of relocating the route by the municipal unit using the traditional method is much higher than this, and such a micro-shield machineThe micro shield machine can also be reused.

    Tianhong Real Estate Group also ordered several 10-meter-level slurry shield machines from Huaxing Construction Machinery to prepare for the undersea tunnel between Xg Island and the artificial island. Yang Jie is also concerned about the progress in this regard.  Understood.

    The artificial island currently being built by Tianhong Real Estate Group is almost ten kilometers away from Xg Island. 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 over there is about 37 meters, and the undersea tunnel must be excavated at least 50 meters below the seabed.

    However, if a shield machine was used to excavate an undersea tunnel before, the space excavated behind the shield body would be immediately patched up with curved cement pipe segments on the tunnel wall, and the tunnel would be formed. But also because of this, the shield machine  The machine can't go back, so it can only focus on drilling forward.

    The previous construction involved two shield machines working opposite each other at the same time. These two shield machines were destined to never see the light of day again¡ª¡ª

    When they were about to meet, they each tilted their heads and got into the tunnel next to them. They would not be used in the remaining short section. These shield machines were then permanently sealed in the dead end next to the tunnel.

    Such a shield machine costs hundreds of millions of dollars. It is such a waste to not see the light of day.

    Yang Jie thought for a while and said to Maozuka 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 the shield machines."

    "Mr. Yang, the other parts are relatively easy to dismantle, but the narrow tunnel cannot accommodate a crane. Because the cutterhead and the teeth weigh 90 tons, the heaviest piece to be moved for disassembly weighs more than 30 tons. Without a crane, it would be difficult to dismantle it.  It¡¯s difficult to solve and transport.¡±

    ¡°Then design a mechanical equipment that can dismantle the cutterhead in the tunnel.¡± Yang Jie said.

    "Young Master Yang, the undersea tunnel is often exposed to temperatures of 40 degrees Celsius. When disassembling the machine, you have to use flame cutting, which is very dangerous because of the smoke and fire"

    "Then instead of using flame cutting equipment, use high-power laser cutting equipment. The high-power laser technology developed by our Huaxing Group Company 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, and they can continue to be assembled and used. For example, if the shield shell supporting the tunnel wall cannot be dismantled,  Leave it in the tunnel to make the inner wall, and dismantle and transport the other parts one by one.¡±

    He looked at Maozuka Tehiko, Xu Guang and others and said: "I know that no one has done this before, but I can't stand waste, so I have to work hard for you experts to redesign and develop it."

    ""

    Mozuka Tehiko and others looked at each other. It was unheard of to dismantle a shield machine with such a large cutter head diameter, more than 100 meters in total length, and weighing about 1,500 tons, and transport it to the ground several kilometers away.  It is also a huge challenge for them, and of course a major innovation.  (Remember the website address: www.hlnovel.com
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