The last human in the universe

Chapter 22 The Big Pit
The figure of [-] square meters is also a conclusion drawn after combining the existing engineering capabilities and food demand in the future.

When he first landed on Sedna, Zhao Changxing had no shortage of high-performance building materials, but extremely lacked engineering capabilities, so building on the surface was the best choice.But now, these two conditions are just reversed.

He no longer lacks engineering capabilities, at least not that much, but he is extremely lacking in high-performance building materials-the building materials produced at this stage are obviously not comparable to those produced by people in the Earth era, so it is natural to build underground.

To build a second planting base, the first thing that needs to be done is the planning drawings.In this regard, Xiaoxi's database stores a large number of various drawings. Basically, Zhao Changxing only needs to input his own requirements, input his existing materials, and click the mouse, and the drawings can be automatically generated.

Therefore, after each production line has entered a roughly stable production state, and two people are left to take care of these, and two people are left on the Pyro spacecraft to be responsible for mining minerals, Zhao Changxing took the remaining four Personally, I started the preliminary civil work.

Planting base No. 100 is only about [-] meters away from base No. [-]. After completion, the two will be directly connected through an underground passage.

Choosing to build the No. 3.5 plantation base underground means a huge amount of earthwork.After a simple calculation, it can be concluded that the No. 3.5 planting base covers an area of ​​7 square meters and is [-] meters high, and the earth volume is as high as [-] cubic meters.Calculated according to the density of rock formations in the selected area, the mass of these earthworks is as high as [-] tons.

The actual data will exceed this figure by [-]% to [-]%.

Even if the gravity of Sedna Star is extremely low, this is not something that can be done purely by manpower, it must be done with the help of machinery.And the only space vehicle, the Hongqi, must undertake the task of mining and transportation, and it is impossible to be transferred here.

Fortunately, Zhao Changxing had already considered this matter, and had a way to deal with it in advance.That is, use some spare parts of the Hongqi space vehicle, and then 3D print some parts to "save" a new construction machine.

The newly manufactured machine was named Red Star by Zhao Changxing.

The performance of the Red Star is obviously not as good as that of the Red Flag, and when driving it, there will always be abnormal noises and tremors from unknown sources inside, which makes people sitting in the cockpit have to wear space suits to avoid There are accidents, but it is still a machine, and its efficiency is still much higher than that of manpower.

At this moment, Zhao Changxing drove the Red Star space vehicle and started digging first.

The area where the planting base No. [-] is planned to be built has been marked with markers.Zhao Changxing drove the Red Star to come here, and the first thing he did was the crushing work.After the hard rock formation is broken, it is replaced with a bucket, and the rock is directly dug into the bucket.When the bucket is full, an auxiliary person will complete the connection between the space vehicle and the bucket, and the space vehicle will directly drag the bucket to transport the earthwork to other places.

The excavation depth of the first layer is one meter, until the entire planning area is dug down by one meter, and then the excavation work will start to dig one meter deeper, and so on, until the depth of five meters is dug.

This is a large pit with an area of ​​up to 3.5 square meters and a depth of five meters.The No. 3.9 planting workshop under planning has an internal height of [-] meters, and the final height is about [-] meters including the thickness of the walls.

When it is finally built, the excavated earth will be backfilled again until it is level with the ground.This means that there is a 1.1-meter-thick rock layer above the No. [-] plantation workshop, and such a thick rock layer can completely replace the radiation protection layer, and even play some sealing and insulating layers.

So on the Sedna planet, Zhao Changxing and an assistant—tentatively designated as Chen Feng, started the work of "repairing the planet" again.

On the first day, Zhao Changxing completed about 40 cubic meters of earthwork.

The next day, the pilot of the Red Star was replaced by Chen Feng, and Zhao Changxing took on the auxiliary work.With such a rotation, the two can basically complete dozens of cubic meters of earthwork every day.

Calculated at this speed, it will take about two years to complete the entire earthwork operation.

This time is acceptable.It is also planned.

Half a month into the earthwork, Zhao Changxing had an unexpected joy.He accidentally discovered that there were actually some pyrite deposits underground here.Although the quality is not too high, the advantage is that the distance is close enough and the access is convenient enough.

So another space vehicle, the Hongqi, was also transferred to fully support the earthwork operations here, so the amount of earthwork transported per day quickly climbed to nearly 100 cubic meters.

Correspondingly, in the industrial area, under the busyness of Qian Yue and others, a large amount of building materials were produced, ready to be used after the earthwork was completed.

It took Zhao Changxing nearly two years to dig this big hole before finally completing it.The next foundation and wall leveling work took another two months.Now, finally, the actual construction work of Plantation No. [-] can begin.

The follow-up work is cumbersome and troublesome, and it is also very delicate, which requires people to do it manually.For this reason, Zhao Changxing suspended the rest of the work as much as possible. Except for the two people who had to be on duty in the Pyro spacecraft and the two who continued to produce building materials, the remaining six people were all summoned to carry out follow-up work with him. construction work.

People first laid an isolation layer at the bottom of the pit to prevent the No. [-] planting workshop from directly contacting the rock formation.

When building No. [-] base, the isolation layer only needs to be laid on the bottom, but it is not enough for the No. [-] planting workshop. Not only the bottom, but also the walls on the front, back, left, and right sides, and the ceiling need to be laid.Because it is buried underground, all six sides are in contact with rock formations.

There is no need to consider the top for the time being. After the insulation layer on the other five sides is laid, it will be the sealing layer and the insulation layer.After these two layers are also laid, it is necessary to lay a large number of pipes and cables.

Originally, the pipes and cables were integrated into the board, but Zhao Changxing obviously does not have such advanced technical capabilities at this stage, so he can only settle for the next best thing, separating them and laying them separately.

Because the No. [-] planting workshop does not have independent energy, water supply, heat supply, garbage recycling and other capabilities, these things need to be completed by the equipment in the No. [-] base.The pipelines and cables that need to be laid are not only inside the No. [-] planting workshop, but must also be connected to the No. [-] base.

In particular, the factor of automation needs to be considered - the crops in the No. [-] planting workshop obviously cannot be taken care of by humans, and everything needs to be done automatically, which further increases the difficulty of construction and the amount of engineering.But there is no other way, Zhao Changxing can only choose to bite the bullet and do it.

This kind of once-and-for-all, troublesome at the beginning, saves trouble in the future, he thinks it is worth doing.

After the preliminary work has been completed on the other five sides except the top, it is time to build the top layer.And when the top layer is completed and has passed the airtightness test, people who come to work here can break free from the shackles of spacesuits and complete follow-up work with higher efficiency.

Before building the top floor, people first need to complete the fixing work of the support rods.

Originally, with the gravity of Sedna, the support rods don't need so many to support and fix the top floor.But counting the 1.1-meter-thick rock formation that will be laid on top of the top layer in the future, it will be different.

However, in order to prevent too many support rods from occupying too much available area and causing losses, in Xiaoxi's design drawings, these support rods were designed into the partition wall as much as possible, and the space between different areas was used as much as possible. Insulating walls take the place of support poles.

It took more than a month to install and fix the support rods.At this moment, the bottom of this "big pit" is densely packed with support rods arranged in a certain order and pointing straight to the sky, just like some traps used to catch prey.

After the support rods were installed, the support structures such as beams and trusses were installed, and the first ceiling panel was successfully laid to the predetermined position.It took several months, and finally all the ceiling panels with a total area of ​​[-] square meters were laid in layers.

"The leak test is ready."

Zhao Changxing thought to himself.

The final finishing work of this stage was completed, and the airtightness test started as scheduled.And these two days have also given people a rare rest.

Zhao Changxing once again held a hot pot meeting, using hundreds of catties of beef, mutton and pork to reward people for their hard work during this period of time.

This time the hot pot conference was so huge that it couldn't even fit in the cabin of the Tinder spacecraft.The main reason is that the 60 children of the third generation are now seven years old and can eat normally. Of course, they are indispensable for the hot pot conference.

The children of the second generation are now 17 years old and are about to usher in the moment of adulthood.

No way, Zhao Changxing had to adopt the method of eating in batches, first with the first generation of young people and the second generation of teenagers, taking care of the third generation of children to finish their meal first, and then put them into the entertainment area, so that They went to play with toys by themselves, and after watching TV, it was their turn to eat.

"The No. [-] planting base has reached a milestone stage. I believe that it won't take long before we can produce more food, more meat, eggs, and milk, which will support us to reproduce more people."

Full of joy, Zhao Changxing held up the water glass—it contained apple juice diluted with a lot of water, with only a little apple flavor—and signaled to all the youths and teenagers: "Come on, cheers!"

"cheers!"

The people cheered together.

(End of this chapter)