Doomsday Bunker Upgrade

In a huge factory building, Chen Xin was walking through the same huge production line with several staff members, visiting the equipment being produced in the factory building.

"Academician Chen, this is currently the most advanced shield machine in our country." The staff pointed to a machine beside him that looked like a giant flat pipe and introduced to Chen Xin: "This shield machine uses our The latest design of the cutter head can cope with various complex geological conditions, whether it is hard rock formation or soft rock formation, it can have a good tunneling effect.

Moreover, on this shield machine, we improved the conveyor belt of the soil bin to speed up the conveying efficiency of the soil. At the same time, we also improved the structure of other parts, which greatly improved the working efficiency of the machine. Compared with the original model, this shield machine is more The tunneling speed of the machine and the speed of pipe laying 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 carefully before asking, "How fast is the tunneling speed of this machine?"

After all, the shield machine is used to dig holes, and the efficiency of natural excavation comes first, 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 excavate 1.5-1.75m every 20-30 minutes on average, and can excavate about 3-5m in an hour on average. It is currently the fastest shield machine in our hands. It's on." The staff was very proud when they introduced it.

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 role of the shield machine is mainly to excavate the tunnel, and in the process of excavating the tunnel, the prefabricated tunnel segments are laid into the excavated tunnel.

In this process, excavation, pipe jacking, follow-up construction and many other processes are added together, and it is already a very fast speed 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, he could even be said to be disappointed.

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

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

And considering that this is an attack, it is necessary to transport troops and various heavy equipment downwards, as well as a large amount of ammunition supplies and other materials used in combat, it is undoubtedly more appropriate to dig diagonally downwards than vertically.

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

Dig slowly, which of course doesn't mean it can't be done.

Although the military's plan is scheduled for half a year, the preparations before the attack, as well as the delays that may be encountered during the attack, combined with various factors, the time set by the military for its own plan is actually a predetermined time. Nine months are reserved and will be extended according to the actual situation.

In fact, although high-level officials demanded to shorten the time for counterattacking alien creatures, and the military has also accelerated their plans, they have already made preparations for at least a year of fighting.

Therefore, if Chen Xin's offensive plan can be completed within a year, it is still within the acceptable range of the high-level officials and the military.

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

Therefore, the speed of tunneling has become a key factor.

"Can this excavation speed be accelerated?" Chen Xin asked the staff, and at the same time he was using the system upgrade interface to look at the shield machine to see if the 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 lot to do with the material and structure of the cutter head. With our current technology, the current This cutter head is already the most efficient cutter head we can make.

If you want to speed up the excavation, you can only modify the cutter head, either by 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 cutter head currently used in this shield machine, as well as the details of its material and structure.

Although the staff didn't know why Chen Xin paid attention to the shield machine, there must be a need for it, so he tried his best to answer Chen Xin's questions.

Listening to the staff's explanation, Chen Xin frowned slightly. Although he could upgrade the material and structure of the cutter head to make it more efficient, it would not improve the efficiency much.

According to the staff, even if the cutter head is improved, no matter how the efficiency is improved, the propulsion 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 excavation of the entire tunnel can be completed within the originally planned time, and there may even be room for extra time.

But this was not enough for Chen Xin. After all, he needed to consider a very important factor, which was the combat time other than tunneling.

Whether it is the alien nest itself deep in the strata, or a 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 just to dig a tunnel, there is no doubt that there is not much 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 order to deal with the idea of ​​possible hostility in the Middle East.

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

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 digging, transfer troops and manpower to the defense line construction in the Middle East.

When the defense line is repaired and the progress of the excavation is almost the same, 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 for tunneling as much as possible.

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