Doomsday Bunker Upgrade Chapter 695: Shield Tunneling

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

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

And on this shield machine, we have improved the conveyor belt of the soil bin to speed up the conveying efficiency of soil. At the same time, we have also improved the structure of other parts, greatly improving the working efficiency of the machine. Compared with the original model, this The tunneling speed and pipe laying speed of each shield machine must be increased by at least 12%. "

Listening to the introduction of the staff, Chen Xin nodded knowingly, and at the same time approached the shield machine, took a closer look and asked, "How fast is this machine going?" /

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

“According to the different rock formations, this shield machine can dig 1.5-1.75m every 20-30 minutes on average, and it can dig about 3-5 meters in an hour on average, which is currently the fastest in our hands. The shield machine." The staff was very proud when introducing.

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 only excavate a dozen meters a day.

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

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

So this shield machine can push 3-5 meters per hour on average, which is really a very fast speed.

But Chen Xin was 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 a hole and attack the alien creature's nest directly. Possibly deeper.

At such a depth, even if it is vertical digging, 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 possible encounters in the construction of supporting facilities and the excavation work. fighting.

Considering that this is an attack, troops and various heavy equipment need to be transported downward, as well as ammunition supplies and other materials that will be used in a large number of operations. It is undoubtedly more suitable to dig down diagonally 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, of course, that doesn't mean it can't be done.

Although the time for the military's plan is half a year, the preparations before the attack, as well as the time delayed by the failures that may be encountered during the attack, combined with many factors, the military has set its own plan. The time is actually reserved for nine months, and it will be extended according to the actual situation.

In fact, although the high-level demands to shorten the counter-offensive time against alien creatures, the military has also accelerated their plans, but they have already made preparations for at least a year.

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

But for Chen Xin himself, a year is still a bit longer, and he must allow extra time for the plan, and he can't fully expect the plan to go smoothly.

As a result, the driving speed becomes a key factor.

"Can this tunneling speed be accelerated?" Chen Xin asked the staff. At the same time, he was using the system's upgrade interface to look at the shield machine to see if the tunneling speed could be improved 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 cutter head we are using now is already the most efficient cutter head we can make.

In order to speed up the excavation speed, the cutter head can only be modified, either by changing the structure or by improving the material, but neither of these can be accomplished in a short period of time. "

Speaking, the staff explained to Chen Xin in detail the advantages of the cutter head currently used by this shield machine, as well as the details of its material and structure.

Although the staff didn't know why Chen Xin was concerned about the shield machine, there was definitely a need for this, so he still tried his best to answer the questions raised by Chen Xin.

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 improvement was 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, it is possible to complete the entire tunnel excavation within the original planned time, and even have extra time to leave room for it.

But for Chen Xin, it's still not enough. After all, a very important factor he needs to consider is the combat time in addition to the excavation.

Whether it's the alien lair itself deep in the ground ~IndoMTL.com~ or the huge number of alien creatures scattered in and underground caverns, it will take time for the military to attack and clear it.

If it only takes half a year to dig a tunnel, then there will 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 of Dongting Lake in a short time. theater issues to deal with the idea of ​​a possible hostile 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, suspend the military's current offensive, turn it into a defensive posture, block the possibility of alien creatures attacking the surface, and then divert troops and manpower to prevent the construction of defense lines in the Middle East while excavating.

Wait until the defense line is repaired and the progress of the excavation is about the same, and then start the offensive 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?"