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Chapter 796 Shield Excavation

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    In a huge factory, Chen Xin was following several staff members as they walked through the same huge production line, visiting the equipment being produced in the factory.

    "Academician Chen, this is the most advanced shield machine in our country." The staff pointed to a machine next to him that looked like a giant flat pipe and introduced to Chen Xin: "This shield machine uses our  The latest designed cutter head can cope with various complex geological conditions, and can achieve good excavation effects whether it is hard rock strata or soft rock strata.

    Moreover, on this shield machine, we have improved the conveyor belt of the soil bin to speed up the transportation efficiency of the soil. We have also improved the structure of other parts, which greatly improved the working efficiency of the machine. Compared with the original model, this shield machine  The machine's excavation speed and pipeline laying speed must be increased by at least 12%.  "

    Listening to the staff's introduction, Chen Xin nodded clearly, and at the same time approached the shield machine, looked at it carefully and then asked: "How fast is the tunneling speed of this machine?"

    After all, the shield machine is used to dig holes. The efficiency of natural excavation is the first priority, and the standard for measuring efficiency is naturally how many meters the shield machine can advance in an hour.

    "Depending on the different rock formations, this shield machine can dig 1.5-1.75m every 20-30 minutes on average, and can dig 3-5 meters an hour on average. It is currently the fastest tunneling shield we have.  The machine is ready." The staff showed great pride when introducing the machine.

    Don¡¯t think this speed is slow. In fact, the tunneling speed of the shield machine is already very fast at this level.

    Under normal circumstances, it is common to dig only a dozen meters a day.

    After all, the main function of the shield machine is to excavate tunnels, and during the tunnel excavation process, prefabricated tunnel segments are laid into the excavated tunnels.

    In this process, excavation, pipe jacking, subsequent construction and many other processes are added together, and it is already very fast to be able to advance more than ten meters a day.

    Therefore, this shield machine can advance an average of 3-5 meters per hour, which is really a very fast speed.

    But Chen Xin was not satisfied with this, and could even be said to be disappointed.

    The reason is simple. The purpose of his trip is to prepare excavation equipment for his plan to dig holes and directly attack the alien creature's nest. The deepest point of the alien creature's nest that he expects to be at least one thousand meters underground, and may even be deeper.

    At such a depth, even if it is vertical excavation, it will take three or four months to dig more than 1,000 meters at a speed of more than ten meters per day, not to mention the battles that may be encountered during the construction of supporting facilities and excavation work.

    Considering that this is an attack that requires the downward transportation of troops and various heavy equipment, as well as a large amount of ammunition supplies and other materials used in combat, it is undoubtedly more appropriate to dig downwards diagonally than to dig holes vertically.

    But if it is diagonal, according to the Pythagorean theorem, this diagonal tunnel will undoubtedly be much longer than the vertical shaft, and the construction period will also be extended a lot.

    Digging slowly, of course, doesn¡¯t mean it¡¯s not possible.

    Although the military's plan is scheduled for half a year, due to various preparations before the attack, as well as the delays that may be encountered during the attack, and multiple factors, the time set by the military for its plan is actually predetermined.  Nine months are left and will be extended based on actual circumstances.

    In fact, although high-level officials have requested to shorten the counterattack time against alien creatures, and the military has accelerated its own plans, they have already made preparations to fight for at least a year.

    Therefore, if Chen Xin's offensive plan can be completed within a year, it will still be within the scope acceptable to the top brass and the military.

    But for Chen Xin himself, one year is still a long time, and he must leave extra time for the plan and cannot completely expect the plan to go smoothly.

    Therefore, the excavation speed has become a key factor.

    "Can this excavation speed be accelerated?" Chen Xin asked the staff. At the same time, he was also using the system upgrade interface to look at the shield machine to see if its excavation speed could be increased through system upgrades.

    The staff scratched their heads and said with some distress: "We also want to speed up the excavation speed, but the excavation speed of the shield machine has a great relationship with the material and structure of the cutterhead. With our current technology, the current  This cutterhead is already the most efficient cutterhead we can make.

    If you want to speed up the excavation, you can only modify the cutterhead, either changing the structure or improving the material, but neither of these two points can be completed in the short term.  "

    With that said, the staff explained to Chen Xin in detail the advantages of the cutterhead currently used in this shield machine, as well as the details of its material and structure.

      Although the staff did not know why Chen Xin paid attention to the shield machine, there must be a need in this regard, so he still answered the questions raised by Chen Xin as much as possible.

    Listening to the staff¡¯s explanation, Chen Xin frowned slightly. Although he could use system upgrades to improve the material and structure of the cutterhead to make it more efficient, the efficiency that could be improved was not much.

    ?According to the staff, even if the cutterhead is improved, no matter how the efficiency is improved, the advancement speed can only be increased by 50% at most, which is the limit.

    This is already a very satisfactory result. As long as this speed can be guaranteed, the entire tunnel can be completed within the originally planned time, and there can even be extra time left.

    But this is not enough for Chen Xin. After all, he needs to consider a very important factor, which is the combat time besides excavation.

    Whether it is the nest of alien creatures deep in the earth itself, or the large number of alien creatures scattered in underground caves, it will take time for the military to attack and eliminate them.

    If it would take more than half a year to just dig a tunnel, there would undoubtedly be little time left for the military to fight. This is obviously not in line with Chen Xin's desire to quickly solve the problem in the Dongting Lake theater in a short time.  to cope with possible enemy situations in the Middle East.

    Of course, if the problem in the Dongting Lake theater cannot be solved in a short time, Chen Xin does not have other options.

    ??For example, the military's current offensive is suspended and turned into a defensive posture to block the possibility of alien creatures attacking the surface. Then, while digging, the troops and manpower are diverted to building defense lines in the Middle East.

    After the defense line is repaired and the excavation progress is almost complete, the offensive will be launched again to solve the problem of alien creatures in the Dongting Lake area.

    However, this plan is only an alternative plan. Before that, Chen Xin still hopes to shorten the time required to dig the tunnel as much as possible.

    So he asked the staff a whimsical question: "Can the cutter head be replaced with a drill bit?"

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