Chapter 798: Shield tunneling

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.

"Academician Chen, this is the most advanced shield machine in our country."

The staff pointed to a machine that looked like a giant flat pipe beside him

and introduced to Chen Xin: "This shield machine uses ours. The latest design

of the cutter head can deal with various complex geological conditions,

whether it is a hard rock layer or a soft rock layer, it can have a good

excavation effect.

Moreover, on this shield machine, we have improved the conveyor belt of the

soil bin to speed up the efficiency of soil transportation. At the same time,

we have also improved the structure of other parts, which greatly improved the

efficiency of the machine. Compared with the original model, this shield

machine Both the boring speed of the machine and the pipe 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, and after a closer look, he asked,

"How fast is this machine's boring speed?"

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 an hour.

"According to the different rock formations, this shield machine can excavate

1.5-1.75m every 20-30 minutes on average, and it can excavate about 3-5 meters

in an hour on average. It is currently the fastest tunneling shield in our

hands. The machine is off." The staff was very proud when introducing them.

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 dig a dozen meters a day.

After all, the role of the shield machine is mainly to dig tunnels, and to lay

the prefabricated tunnel segments into the excavated tunnel during the tunnel

excavation process.

In this process, the excavation, pipe jacking, follow-up 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 3-5 meters in an hour on average,

which is really a very fast speed.

However, Chen Xin was not satisfied with this, or even disappointed.

The reason is simple. The purpose of his trip is to prepare digging equipment

for his plan to dig a hole directly into the nest of alien creatures, and he

predicts that the deepest part of the nest of alien creatures is at least one

kilometer above the ground, and may even be deeper.

At such a depth, even if it is digging vertically, it would take three to four

months to dig more than a thousand meters at a speed of more than ten meters

per day, not to mention the completion of the battles that may be encountered

in the construction of supporting facilities and the excavation work.

And considering that this is an offensive that requires downward transport of

troops and various heavy equipment, as well as a large number of ammunition

supplies and other materials that will be used in combat, digging diagonally

downward is undoubtedly more suitable than digging vertically.

But if it is diagonal, according to the Pythagorean theorem, this diagonal

tunnel is undoubtedly much longer than the vertical shaft, and the

construction period will also be much longer.

Dig slowly, of course this is not to say no.

Although the military’s plan is scheduled for half a year, the preparations

before the offensive and the time delays that may be encountered in the

offensive process are combined with various factors. The military’s time set

for its own plan is actually predicted There are nine months left, and will be

postponed according to the actual situation.

In fact, although high-level officials requested to shorten the time for

counterattack against alien creatures, and the military accelerated their

plans, they were already prepared to fight for at least one year.

Therefore, if Chen Xin's offensive plan can be completed within a year, it is

still within the acceptable range of the high-level and military.

But for Chen Xin himself, the year is still a bit longer, and he must set

aside extra time for the plan, and he cannot fully expect the plan to go

smoothly.

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

"Can this speed of excavation 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 it could increase its excavation speed through system

upgrades.

The staff scratched their heads and said with some annoyance: "We also want to

speed up the tunneling speed, but the tunneling 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 tunneling speed, you can only modify the cutter

head, either by changing the structure or by upgrading the material, but

neither of these can be done in the short term. "

With that said, 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 did not know what Chen Xin was concerned about with the

shield machine, there was definitely a need in this regard, so he answered as

much as possible to the questions raised by Chen Xin.

Listening to the explanation of the staff, Chen Xin frowned slightly. Although

he can upgrade the material and structure of the cutter head by system upgrade

to make it more efficient, the efficiency that can be improved is not much.

According to the staff, even if the cutterhead is improved, no matter how

efficient it is, it can only increase the advancing speed by 50% at most,

which is the limit.

This is already a very satisfactory result. As long as this speed can be

ensured, it is possible to complete the excavation of the entire tunnel within

the originally planned time, and even have plenty of time to leave room.

But this is still not enough for Chen Xin, after all, he needs to consider a

very important factor that is the combat time in addition to tunneling.

Whether it is the nest of alien creatures deep in the ground itself, UU

reading www.uukanshu. Com is still a huge number of extraterrestrial creatures

scattered in underground caves, and 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 down, then there

would undoubtedly not be much time left for the military to use for combat.

This obviously does not meet Chen Xin’s desire to quickly resolve the Dongting

Lake theater issue in a short time. To deal with the idea of possible

hostilities in the Middle East.

Of course, if the problem of the Dongting Lake theater cannot be resolved in a

short time, Chen Xin is not without other plans.

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 transferred to the

defense line to prevent the Middle East.

When the defense line is repaired and the progress of the excavation is about

the same, the offensive will be restarted to solve the problem of alien

creatures in the Dongting Lake area.

However, this plan is only an alternative plan. Prior to this, Chen Xin still

hopes to shorten the time required to drive the tunnel as much as possible.

So he asked the staff a whimsical question: "Can I replace the cutter head

with a drill?"