I! Pretending to Be Reborn, Director of Doomsday Hoax

"Bio-nanofilm is a double-ionized layer membrane with a nanoscale interlayer distance, which can maximize the extensibility of water molecules and has strong charge adsorption."

"We have set up bio-nanofilms in areas that are heavily dusted, such as quicklime slaking, dust-soil construction areas, and areas such as loose cement and other fine-grained bulk materials that are easy to fly."

"Spraying the bionano film on the surface of the material can attract and agglomerate small particles of dust, making them aggregate into large particles of dust, which will settle due to increased self-weight."

"The dust removal rate of this technology can reach as high as 90.00% or more! The average operating cost is only about five cents per ton!"

This technology of Longguo is already very mature, so the cost has reached a level that cannot be lowered.

If other countries, such as Berry Country and Cherry Blossom Country, want to use bionanofilm to suppress dust, the cost per ton may exceed [-] yuan, which is ten times that of Long Country.

Or,

Most of the technologies of the Dragon Kingdom in terms of infrastructure have incomparable advantages over other countries.

Even, Dragon Kingdom has formed an absolute monopoly in certain top technologies!

This is also the strength of Dragon Kingdom as an infrastructure madman! !

Zou Botao had a proud smile on his face, and he continued:

"There is also cloud and dust suppression technology."

"This is through high-pressure ion atomization and ultrasonic atomization, which can produce ultra-fine dry fog between one micron and one hundred microns."

"Ultrafine dry fog particles are fine and dense, which fully increases the contact area with dust particles. Water mist particles collide with dust particles and condense to form agglomerates. The agglomerates continue to grow larger and heavier until they settle naturally to achieve the purpose of eliminating dust. "

"The last method is wet dust collection technology."

"Use the pressure drop to absorb the dust-attached air, and remove dust under the double action of centrifugal force and the mixing of water and dust gas; the unique impeller and other key designs can provide higher dust removal efficiency."

Xu Qiu showed appreciation.

During the construction of the dungeon, the health of the people in these projects should not be forgotten.

This is what a great country should do!

Zou Botao walked in front, leading the way for Xu Qiu, and introduced: "The east side is our underground city construction area."

"This area, about [-] square meters, is the initial construction headquarters."

Xu Qiu looked over.

The [-]-square-meter construction headquarters has already been built in sevens and eighties, with workshops, construction canteens, etc., which are quite complete.

Now, the construction steps of the Dragon Country Dungeon are to open up an initial area of ​​[-] square meters.

This area is used to accommodate giant machinery, workers, etc.

And the next underground city space of more than 100 square kilometers will be excavated by shield tunneling method!

If you don't know the details, you may think that a tunnel will be built in the dungeon.

Because in fact, the shield machine is indeed a high-tech machine used to build tunnels. Its working principle is that a cylindrical steel component is pushed forward along the tunnel axis to excavate the soil.

The shell of the cylindrical assembly is the shield, which acts as a temporary support for the excavated, unlined tunnel section, withstands the pressure of the surrounding soil and sometimes groundwater pressure and keeps it out.Excavation, soil dumping, lining and other operations are carried out under the cover of the shield machine shield.

But in fact,

The opening of the tunnel by the shield machine is only the first step in the formal construction of the dungeon.

This is not a simple refuge,

It's not the small underground Noah's Ark in Berry Country!

What Xu Qiu wants to do, what the Dragon Kingdom needs is a large underground city of more than 100 square kilometers, 100 hectares, more than [-] million square kilometers! !

This is the city!

It is an underground city that accommodates a large number of residents, and integrates food, clothing, housing, transportation, eating, drinking and entertainment, and is no different from the urban groups on the ground!

therefore,

The construction of a super dungeon is definitely not as simple as digging out the earth in the middle, and then building a building in this space.

Among them, it also involves bearing capacity, load, space stability, as well as mechanical properties, hydraulics, petrology and other issues.

Including geology, civil engineering, machinery, mechanics, hydraulics, electricity, control, measurement and other disciplines and technologies.

Moreover, above the underground city, in the soil layer of 50 meters, there is also a network of underground pipes.

These are all issues to be considered in construction.

Xu Qiu's plan is to open up the two ports of the dungeon through the shield machine first,

In the underground city of [-] square kilometers, there were about [-] shield machine tunnels in the early stage.

And these tunnels will play the role of bearing columns in the dungeon.

Just like the load-bearing structure of a house,

These thousand shield machine tunnels will become the key structure to maintain the stability of the underground city in the later stage, and also an important area to support the gravity load on the top.

A special technician of the shield machine said: "Our shield machine has a high-precision millimeter-level guidance and navigation system."

"A laser guidance system is also installed on the shield machine. The laser target is installed at a suitable position on the shield machine to receive the laser from the high-precision total station. The computer calculates the attitude of the shield machine and transmits the result to the shield machine's Operating platform O "

"At the same time, within a certain period, engineering surveyors will manually check the position of the shield machine to ensure that the tunneling trajectory of the shield machine meets the design requirements."

"Within a month, we should be able to get through the east and west of the dungeon."

The person in charge of the construction technology department said:

"Director Xu, once the thousand tunnels are completed, we will carry out reinforcement work on the top of the dungeon space within ten days to solidify and stabilize the soil above us to ensure that the space above becomes one and will not collapse."

After all, this is an underground city of [-] square kilometers.

If this large space was dug out, if no special measures were taken to reinforce it, the soil above would have collapsed long ago.

Now, what needs to be worried about is soil collapse during construction.

After the arrival of the extremely cold era, the temperature on the surface of the earth became minus [-] degrees Celsius,

The soft soil will become solid frozen soil, and then these lands will really be integrated and cannot be shaken at all.

Xu Qiu nodded slightly and said:

"During the construction of the underground city, the soil layer about 50 meters above the underground city should also be started simultaneously."

"The laying of thermal insulation layer, thermal insulation layer, thermal insulation material, etc. shall be laid layer by layer in units of three meters."

"In addition, each layer is reinforced once to ensure the coagulation of the underground soil and prevent it from being soft and collapsing."

"In addition, the laying unit of the underground pipeline network is based on the number of layers. Within the range of 50 meters underground, underground rail transit, pipeline network systems and some simple refuge facilities need to be constructed."

Xu Qiu's eyes are deep. This design is actually quite important.

After the nuclear power dragon is opened, it can only pass through the dungeon, and it is absolutely impossible to enter the interior of the dungeon.

How to transport the materials transported by the nuclear-powered dragon to the interior of the dungeon is a big problem.

This problem has long been considered in Xu Qiu's blueprint of the super dungeon.

The underground rail transit and pipe network system within 50 meters underground, in addition to the ecological control of the entire underground city, the monitoring and adjustment of atmospheric circulation, etc.,

It is also responsible for the function of receiving materials from the dungeon and discharging some harmful substances that cannot be metabolized from the dungeon.

With the help of the nuclear power dragon, these harmful substances will be transported to the surface, and then they will be driven by nuclear energy, ejected to start, and thrown into the white ice field of the principle dungeon.

"Did you encounter any difficulties during the excavation of the shield machine?" Xu Qiu asked after inspecting the construction site for a while.

This is the main purpose of his visit this time.

Zou Botao was silent for a moment, and said: "Director Xu, we did encounter some problems during the excavation..."

"Go ahead."

"The first problem is to traverse the water-rich sand and pebble formation."

0.. ask for flowers...

It was not beyond Xu Qiu's expectation.

Shield construction of tunnels in water-rich sand and pebble strata is a difficult problem in subway construction and tunnel excavation all over the world.The so-called water-rich sand and pebble formation is the bottom layer with hard pebbles wrapped in fine sand grains, uneven strength, rich groundwater and high water table.It is very difficult for the shield machine to operate in such a stratum, especially the settlement is not easy to control, and the safety risk is extremely high.

There are many problems.

First of all, during the excavation process, the bottom layer of sand and pebbles will cause serious damage to the shield machine cutter head, props, and muck conveying system.

This results in a very high frequency of tool changes, with an average tool change every 150 meters.

Also, due to the high groundwater table, there may be complex groundwater accumulation issues.

This point is somewhat similar to the sections of Luding and Zhedo Mountains.

Once the machine is shut down when changing the tool, the groundwater will press down and cause a collapse.

In addition, because the formation is partially sandy pebble soil interbedded with sand through the lens, when passing through the formation, the problem of agglomeration is very easy to occur in front of the cutter head, resulting in low efficiency and so on.Crossing the water-rich sand and pebble strata, even in the whole world, there is almost no solution!

Zou Baitao said with a wry smile: "So, we have penetrated things within a month, which is actually very fast."

"According to the normal progress, it may take about a year just to open up such a large space."

"And we started construction on multiple road sections at the same time."

"In addition to starting shield excavation from both ends on the east and west sides, we also set up several shafts in the middle of the road, and started construction on multiple sections at the same time!" Get the job done."

Speaking of this, everyone was a little rejoiced.

The construction speed beyond the limit actually helped them avoid a very serious problem.

That is the deformation settlement of the tunnel!

According to the general progress, the construction of subway tunnels in units of years often encounters a problem,

That is, after a long time, the ground subsides, and the soil layer and rock layer collapse due to lack of timely construction.

However, there are a thousand tunnels in the dungeon, so there is no need to worry about this problem at all.

The solution is because Dragon Kingdom is too fast.

Bitterness was revealed on everyone's faces.

Crossing water-rich sand and pebble strata has troubled engineers all over the world for decades.

Since the invention of the shield machine, water-rich sand and pebble formations have been the nightmare of this machine.

Blades and other equipment need to be replaced every more than 100 meters. Not many construction companies can afford this kind of cost.