Chapter 796

In a huge plant, Chen Xin is following several staff through the same huge production line to visit the equipment being produced in the plant.

"Academician Chen, this is the most advanced shield machine in China." the staff pointed to a machine that looks like a flat giant pipe and introduced it to Chen Xin: "this shield machine adopts our latest designed cutter head, which can deal with various complex geological conditions, whether it is hard rock or soft rock, and can have a good tunneling effect.

Moreover, on this shield machine, we have improved the conveyor belt of the earth bin to speed up the soil conveying efficiency. At the same time, we have also improved the structure of other parts, which greatly improves the working efficiency of the machine. Compared with the original model, the tunneling speed and pipeline laying speed of this shield machine should be increased by at least 12%

Listening to the introduction of the staff, Chen Xin clearly nodded, approached the shield machine, looked carefully and 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, and the standard to measure the efficiency is naturally how many meters this shield machine can advance in an hour.

"According to different rock strata, this shield machine can dig 1.5-1.75m every 20-30 minutes, and about 3-5M per hour. It is the fastest shield machine in our hands." the staff was very proud when introducing it.

Don't think this speed is slow. In fact, the tunneling speed of shield machine has been very fast at this level.

Under normal circumstances, it is common to dig only more than ten meters a day.

After all, the role of the shield machine is mainly to dig the tunnel, and the prefabricated tunnel segments are laid into the excavated tunnel in the process of digging the tunnel.

In this process, many processes such as excavation, pipe jacking and subsequent construction can be pushed more than ten meters a day, which is a very fast speed.

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

But Chen Xin is not satisfied with this, even disappointed.

The reason is very simple. The purpose of his trip is to prepare excavation equipment for his plan to dig holes and directly attack alien biological nests. He expects that the deepest point of alien biological nests is at least 1000 meters underground, or even deeper.

At such a depth, even if it is a vertical excavation, more than 1000 meters will have to be excavated for three or four months according to the propulsion speed of more than 10 meters a day, not to mention the possible battles encountered in the construction of supporting facilities and excavation.

Considering that this is an attack, it needs to transport troops and all kinds of heavy equipment downward, as well as a large number of ammunition supplies and other materials that will be used in combat, it is undoubtedly more appropriate to dig obliquely downward than to drill vertically.

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

Dig slowly. Of course, that doesn't mean No.

Although the time of the military's plan is half a year, the preparations before the attack and the time delayed by the difficulties that may be encountered during the attack are combined by many factors. In fact, the time set by the military for its own plan is reserved for nine months, and will be postponed according to the actual situation.

In fact, although the high-level demands to shorten the counter offensive time against alien creatures, and the military has accelerated its own plan, they are ready to fight for at least a year.

Therefore, if Chen Xin's attack plan can be completed within one year, it is still within the range acceptable to the high-level and the military.

But for Chen Xin himself, a year is still a little longer, and he must set aside spare time for the plan, and he can't completely expect the plan to go smoothly.

Therefore, the tunneling speed has become a key factor.

"Can the tunneling speed be accelerated?" Chen Xin asked the staff. At the same time, he was also looking at the shield machine with the system upgrade interface to see whether the tunneling speed can be improved by system upgrade.

The staff scratched their head and said with some distress: "we also want to speed up the tunneling speed, but the tunneling speed of the shield machine has a great relationship with the material and structure of the cutterhead. According to our current technology, the cutterhead used now is the cutterhead with the highest efficiency we can make.

If you want to speed up the excavation, you can only transform the cutterhead, either change the structure or improve the material, but neither of these can be completed in a short time. "

With that, the staff explained in detail to Chen Xin the advantages of the cutterhead now used by the 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 answered Chen Xin's questions as much as possible.

Listening to the explanation of the staff, Chen Xin frowned slightly. Although he can improve the material and structure of the cutterhead by means of system upgrading to make it more efficient, the efficiency that can be improved is not much.

According to the staff, even if the cutter head is improved, no matter how the efficiency is improved, it can only increase the propulsion speed by 50% at most, which is the limit.

This is already a very satisfactory result. As long as this speed can be guaranteed, the whole tunnel excavation can be completed within the originally planned time, and even there can be spare time to make room.

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

Whether it is the alien nest itself in the deep strata or the huge number of alien creatures scattered in the underground caves, the military's attack and suppression of them will take time.

If it takes more than half a year just to dig a tunnel, there will undoubtedly be little time left for the military to fight. This is obviously not in line with Chen Xin's idea of quickly solving the problem of the Dongting Lake theater in a short time to deal with the possible enemy situation in the Middle East.

Of course, if the problem of the Dongting Lake theater cannot be solved in a short time, Chen Xin is not without other solutions.

For example, the general's current offensive is suspended and turned into a defensive posture, blocking the possibility of alien creatures attacking the surface, and then while driving, he turns his troops and manpower into the construction of a defense line to prevent the Middle East.

When the defense line is repaired, the progress of excavation is almost the same, and then launch the offensive again to solve the problem of alien creatures in Dongting Lake area.

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

So he asked the staff a whimsical question: "can you replace the cutterhead with a drill bit?"

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