Chen Yi, who still stayed in the underground city of Kubol Gold Mine, ignored the far north of the Far East after making sure that it would not be disturbed in a short time. He just did what he had to do.
Now, the next goal of the underground city is to extend the underground passage to the town of Bilibino and completely connect it to the outside world, whether in terms of transportation or communication.
After this incident, both the management committee and Chen Yi realized that it would be too slow to continue to be isolated from the world. Transportation can be tolerated, but communication must maintain smooth contact with the outside world.
Although the pattern of the far north in the Far East has become like this, it does not threaten the Kubol Gold Mine, but it has also sounded the alarm for everyone. Information exchange with the outside world is really inconvenient, and a lot of intelligence has a certain lag. .
In fact, the changes in the Chukotka Sea this time had already appeared, but it took three or four months to realize the seriousness of the problem. In the final analysis, the two sides focused on different concerns.
The Qinglong Study Group outside is mainly responsible for solving a series of demands put forward by the management committee here. For example, an increasing number of orders have forced a number of enterprises and institutions in the mainland, such as China Railway Engineering Equipment Group, to establish projects to develop products with longer service life and better maintenance. TBM with easier maintenance.
And the management committee had to worry about the entire dungeon system all day long, and their nerves were tense, fearing that something would go wrong that day, and everyone happily played gg.
This is not unfounded worry. Even though the entire underground city seems to be operating very stably now, the Sword of Damoryus hangs over their heads all the time.
This system is actually very fragile. A considerable number of people are assigned to various monitoring positions. Once an abnormality is discovered, they have to report it quickly. Often a big change in the data will cause everyone to panic.
Not to mention the severe cold on the ground, there is also the most torturous point: the entire underground city is in the permafrost layer instead of the bedrock layer, and it is still expanding.
In the Chukotka region, the depth of the frozen soil is about 500-700 meters. The construction of the underground city has brought a lot of heat. The layer of frozen soil close to the underground city has begun to melt, although other places have quickly stabilized here. There seems to be no change in the temperature, but some small changes in Chukotka since the four decimal places in the regional data are an unbearable burden for the underground city.
The resurgence of some ancient viruses and bacteria in the permafrost is nothing to worry about. Everyone just needs to pay attention to it.
The release of carbon dioxide, methane and other carbohydrates is nothing. It can be regarded as directly contributing to the heating of the underground city.
However, frozen soil is also a soil medium that is extremely sensitive to temperature and contains abundant underground ice. Therefore, frozen soil has rheological properties and its long-term strength is much lower than its instantaneous strength characteristics. Because of these characteristics, construction in frozen soil areas is difficult. Engineering structures must face two major dangers: frost heaving and melting.
But it's okay because the underground city is located underground, and it can't expand at all under the huge formation pressure. However, the fact that the contact surface is heated and the underground ice melts makes people scratch their heads.
This can easily increase the humidity in various areas of the underground city, causing corrosion of key parts of the equipment in some areas, affecting the normal operation of the system. Therefore, we must not only maintain the temperature, but also ensure that the humidity in each area is constant.
. . .
Boom boom boom——
Chen Yi was wrapped in a thick military coat and stood in front of a five-story tall guy with a tablet in his hand, carefully checking various data.
This is a tunnel under construction. The five-story tall thing in front of me is the horseshoe-shaped shield machine developed by China Railway Equipment Group nearly ten years in advance with the help of Chen Yikaihang.
Nine cutterheads are distributed in an orderly manner on a disc with a diameter of 15.3 meters. The largest diameter is 4.3 meters and the smallest is 1.1 meters. Each cutterhead is an independent control system and can be combined at will, simultaneously, individually and in different directions. The rotations together form a horseshoe-shaped cross-section.
Compared with the "extensive" construction of Blue Star's mainstream circular shield machine with a large cutterhead rotation and a set of control systems, the horseshoe-shaped shield machine can carry out precise excavation in the largest area and largest angle for different soil layers, which greatly improves the efficiency. Work efficiency, there is no need to dig a circular tunnel and then fill the bottom level as before, and it also reduces the difficulty of tunnel protection.
Behind the horseshoe-shaped shield machine is a nine-meter-long sealed body, followed by six carriages. This big thing is now crawling underground like a steel earthworm.
The cutting cutterhead on the head transports layers of wet soil and stones through the internal conveyor belt and directly into a muck truck. At the same time, pieces of prepared tube segments have already been placed on the open space. They are waiting for the small crane to load into the launch shaft of the TBM.
The segments are assembled through the handling device inside the shield machine. The six segments form a tunnel. If you look carefully, you can find some inconspicuous grooves on the surface of the segments, some of which go straight to the inside, forming a tunnel. Channel by channel.
Occasionally, there is an interface that can be connected to the pipe on the inside of a segment. These segments are made of soil excavated by shield machines.
This black steel earthworm keeps moving forward underground. The internal operators constantly adjust its direction of travel based on the data from the measurement system so that the route will not deviate.
Chen Yi looked at it for a while and then asked the person next to him: "Is the blade reserve still enough?"
"It is sufficient for the time being because the energy and power system structure has been simplified, which greatly increases the service life of the shield machine. However, the high scrap rate of the cutter head is also a problem. I think we should give full play to our energy advantages here. Can we design a Water jet or electric current bombardment of gravel excavation TBM?”
Chen Yi glanced at this buddy with the eyes of a god. This kid really dared to think, but this idea is not impossible in the current situation where there is no need to compromise with the energy system.
"Okay, I will go to the China Railway Equipment Group."
At this time, Chen Yi took another look at the pipe segments in the open space. These pipe segments were not only the supports for the entire underground city, but were also responsible for collecting the formation ice that melted due to sudden heating.
After the ice melts into water, it will enter the underground city along the channels formed by the grooves on the surface of the tubes. This is the only means to collect fresh water on a large scale before seawater desalination. It also reduces the evaporation of water, which is very important for regulating air humidity. effect.
It is necessary to maintain humidity in planting and breeding areas, but some production workshops or control centers cannot stand such humidity, especially some instrument panels that are easily affected.
There are fifteen working shield machines like this in the entire underground city. It is the largest shield machine currently owned by Blue Star. Even the China Railway Equipment Group has not started to make it public on the market because various domestic projects are We are waiting to see if this new toy will work, but the Kupol Gold Mine is still increasing its order volume.
However, recently, because the western region is also urging, the subway project departments of some cities are also urging, and even the mountainous traffic tunnel project is also urging, China Railway Equipment Group has prepared to finalize the final shape for the time being and then fully expand its production capacity, so it wants to make money The money for Wai Guo Ren will have to wait for some time. . .
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