I! Pretending to Be Reborn, Director of Doomsday Hoax

The head of the Food and Material Reserve Department said quietly: "That's... a big agricultural country!"

Saito Gang didn't want to hear such words, as it would hurt everyone's morale, so he changed the subject and said: "Imitate Longguo, if something goes wrong, the price to pay is really too high!"

"Yes. They are building dungeons with the power of the whole country! The aging population of our Cherry Blossom Country is very serious, and domestic production and economy are supported by the younger generation. If they really run to build dungeons..."

"The national power of the cherry blossom country is declining!"

"The price is too high! Baga, you can't bet!!"

The director of the Sakura National Meteorological Agency said: "In my opinion, the underground city is either protected from nuclear strikes or severe cold!"

"The entire country is building dungeons. I think the probability of a nuclear attack is not high. Could it be... the severe cold across the country?"

"The temperature of the underground increases by two to three degrees Celsius for every 100 meters down. If the surface temperature is zero degrees Celsius, digging down 1000 meters, this is the most suitable place to live in an underground city!"

"However, the dungeons in Dragon Kingdom don't seem to have a depth of more than 100 meters!"

"This is reasonable. Because, with the current human technology, it is unbelievable to want to build a dungeon 1000 meters underground!"

"Could it be something catastrophic on the surface? A hurricane, a tsunami, or hail, or a blizzard?"

Others were also lost in thought.

Saito just sat in the first place, his body was shaking.

At this moment, the tremendous pressure he was facing and the wavering in his inner choice made him very painful!

"Everyone...let's also...build a dungeon"

Finally, Saito couldn't hold it anymore, his eyes were red, and he said.

"However, the prime minister will not agree to the construction of a dungeon across the country, and neither will the citizens. Therefore, first build a dungeon covering an area of ​​[-] hectares in the north!" Saito just left the meeting hall quickly.

He returned to the office, stared at the national flag, and said to himself in a daze: "My choice today, right?"

Dragon country time, six o'clock in the evening.

Xu Qiu was sitting in the office, with Lu Guangyuan and Li Bingqing standing next to him. On the screen in front of him was the main person in charge of the more than 1000 dungeons in this video conference.

These people come from all walks of life, such as rock mechanics, physics, architecture, mathematics, etc., who can be entrusted with important tasks and participate in this conference, they are all leaders in their respective fields!At this moment, there is only Xu Qiu alone in the video.

All the people attending the meeting looked solemn, looking at this stern and calm young man respectfully, waiting for him to speak.

Every meeting of this young director of the Strategic Dangerous Affairs Bureau will shake the whole country!

"See you again, everyone in charge."

The same lilting voice resounds across the country, in more than 600 cities, a thousand dungeon planning districts...  

Xu Qiu stared at the camera and said lightly:

"Now, the construction of the dungeon has started, and all regions will follow my design sketch of the dungeon, according to the local plate structure, energy composition, geological difference, soil hardness and even altitude, etc., according to local conditions, refine the design sketch, and build more suitable for the local area. underground city."

"However, as the underground city began to carry out regional planning, a new problem appeared!"

"Our country has a vast territory, and the development of various regions is uncoordinated and unbalanced, and the distribution of resources is not reasonable."

"This situation is especially prominent in today's era of convenient transportation and developed transportation!"

"What's more, everyone enters the underground city and lives in the underground city of more than 100 hectares?"

"At that time, if there were no supplies, transfers, and support channels between various dungeons, there must be local resources that are too rich, and there must be social turmoil in some dungeons due to lack of food and resources!" more than 1000 dungeons in charge Hold your breath.

Their admiration for Xu Qiu reached its peak at this moment.

When everyone is thinking about how to combine the local reality and build the prototype of the super dungeon,

Xu Qiu has already thought of a deeper and farther future! .

Chapter 64 How to break through a thousand dungeons?

The leader has a long-term view so far, why worry that the Dragon Kingdom dungeon cannot be completed? !

Everyone is full of confidence in the construction of the dungeon.

"call."

"call."

Some were short of breath.

They were waiting for what shocking design Xu Qiu was going to come up with.

At this moment, Xu Qiu, who was sitting on the chair, showed a smile.

He already had a plan, but he still wanted to hear what kind of different solutions these old people who represented the top IQ of the Dragon Kingdom would give.

"Seniors, there must be transportation routes extending in all directions between a thousand dungeons. This is the key to maintaining the balance between different dungeons, and it is also an important channel to maintain the emotions of people everywhere!"

"If you have any good ideas, you can mention them."

After a long silence, the old acquaintance Professor Huang Yuan spoke.

"Hi, Director Xu."

Huang Yuan called out respectfully, and spoke loudly, saying:

"My idea is very simple, build a railway."

"Everyone can refer to the Qinghai-Tibet Railway in our country!"

"This is also a miracle of our Longguo infrastructure, a well-known world-class engineering miracle! Back then, I was fortunate to participate in the construction of a section of the Qinghai-Tibet Railway, and I was a close friend with the chief designer!" "At that time The Qinghai-Tibet Railway, the biggest problem is the permafrost!"

"And along the Qinghai-Tibet Railway, there are a lot of permafrost layers..."

"Everyone knows that the density of water is higher than that of ice. Therefore, the volume of water will increase during the process of condensing into ice. In addition, water will migrate from the unfrozen area to the freezing front and freeze on the freezing front. Block, correspondingly, the volume of the soil will also expand."

"And this will cause deformation of the railway subgrade built on permafrost, affect the development of the project, cause the base soil layer to compress, and damage the railway foundation. Longitudinal cracks appear on the left side of the road on the sunny side."

"We have spent 42 years gathering units such as the First Railway Survey and Design Institute, Longtie Northwest Scientific Research Institute, Long National Academy of Sciences Cold and Arid Area Environment and Engineering Research Institute to study the meteorology, ground temperature and solar radiation of the permafrost. Carry out long-term, uninterrupted surveys, observations, and research."

"Furthermore, overcoming difficulties with professionals in the fields of permafrost thermodynamics, mechanics, permafrost engineering, temperature and heat flow, and finally edited the "Detailed Rules for Railway Survey and Design in Permafrost Areas of the Qinghai-Tibet Railway"!"

"therefore!"

"I have full experience in the design of railways on permafrost. Our country's research and construction in this area are at the international leading level!"

As soon as this plan was exported, it immediately aroused doubts from everyone.

"After the sun goes out, the temperature on the surface of the earth will slowly drop to minus two hundred degrees Celsius!"

"Yeah, minus more than 200 degrees, it's not comparable to the temperature along the Qinghai-Tibet Railway!"

"Professor Huang's words are very good, but at a low temperature of minus two hundred degrees, any existing machinery and equipment, including rails, train pipelines, etc., will be destroyed by the extreme low temperature!" First engineer of the Ministry of Railways of Longguo Luo Hesong turned on the camera. He once designed high-speed railway lines for Tiandu and Modu, two first-tier cities.

"Director Xu, I also have an idea."

"Since the surface environment is harsh, can we put this traffic route underground?"

"In your design, the underground zero to 50 meters is the underground rail transit, pipe network system and refuge facilities. Since this area can become the transportation channel of the underground city, why can't each underground city be opened up from the ground, and also use The way of underground rail transit connects every dungeon!"

"We can dig a long pit outside the rail transit originally designed for the underground city, lay a huge pipeline in the pit, adopt the support form of bored piles + step support + steel support, and then lay Get on the tracks, install signaling systems, build platforms, and more!"

"And this will become a passage leading to various dungeons!"

"In the underground of the country, dig out a subway passage that can reach any place in the motherland... Our Dragon Country has such strength!"

Luo Hesong's plan did not satisfy everyone.

"How to ensure the ventilation system, drainage and water supply system, and the supply and oxygen supply system?"

"Engineer Luo, don't overlook one point. The snow on the surface will gradually accumulate and become thicker. It will be fine for five years, and it will be fine for ten years. If it snows continuously for 20 years, how much pressure will the pipeline bear? ?"

"That's right, not to mention glaciers, mountains and other terrains! The rail transit inside the dungeon is small. If you open up such a large traffic road between dungeons, the load and carrying capacity will be greatly reduced. Once The collapse will even affect the dungeon below!"

Mu Zishi, the chief designer of the Sichuan Railway, retorted: "I would like to ask the biggest question. The altitude of our country is very surprising, and the terrain and geology are different between different regions. The southeast coast is sea level, and the Qingzang Plateau Three 5000 meters!"

"Such a huge disparity of surprise, how to pass it on?"

"What's more, what if there are mountains and lakes between the different dungeons? Could it be possible to punch through the mountains and bypass the lakes?"

"Moreover, during the process of excavating the pipeline, there are magmatic rocks for a while, sedimentary rocks for a while, metamorphic rocks and even granite for a while, how to deal with it?"

"We are running out of time now, and it is impossible to waste it on these time-consuming, labor-intensive but thankless projects!".

Chapter 65 Shield technology, viaducts, pipeline slides and power towers

Huang Junran, director of Tiandu Rail Transit Shield Technology Research Institute, nodded and said: "Our Longguo has advanced shield machines and leading shield technology, which are the biggest contributors to our victory over complex geology. However, even so, I want to It is almost impossible to build an underground transportation route through the whole country!"

Lin Shubin, director of Pengcheng Rail Transit Technology R&D Center, said: "The shield excavation process will be full of hardships. Let alone eleven months, even 11 years, it may not be completed!"

Luo Hesong did not give up easily, he took out the blueprint, which was the design draft of the Tiandu Automobile Crossing Street Tunnel Project he had designed.

In the video, he used a pen and ruler to continuously mark and measure. The first engineer of the Longguo Railway Ministry only had a passion for infrastructure and engineering in his eyes!

"If the shield method is adopted, the originating shaft and the receiving shaft are excavated at the start and end of each urban tunnel, and then the shield components are hoisted into the originating shaft and assembled completely. It's not impossible to build the subway!"

"All of them are replaced with reinforced concrete structures. The cross-section of the tunnel design can be larger than that of the Tiandu Automobile Crossing Tunnel...the length, width and height are lengthened, 1650cnM50cm."

"If this underground passage is buried in shallow ground, the allowable bearing capacity of the foundation must be increased. The bearing capacity of ordinary tunnel engineering is generally about 200kpa. Considering the perennial snow accumulation, the weight will continue to increase!"

"The foundation bearing capacity of this underground passage can be increased to a limit...50,000kpa!"

"...The base cushion is made of C15 plain slabs, and the channel structure is made of C30 waterproof slabs. The penetration level is greater than P12! The compactness and pore structure of the concrete will be even better!"

"At the same time, all the places where the channel is in contact with the soil are replaced with waterproof materials, and 12cm thick C20 fine stone steps are used as protection on the top, ground and sides of the channel!"

"Director Xu, what do you think?"

Luo Hesong asked with bright eyes.

Xu Qiu shook his head, "Professor Luo, your idea is very good, but... it is too difficult to implement."

"Taking Guangdong No. [-] Underground City as an example, if an underground passage is to be built here, it must pass through the urban ring road, pass through the Pearl River system three times, and pass through Pazhou, Yuancun, Shiweitang, Nanjin Road, etc. During the excavation process of the shield machine in the road section, it was very difficult because of the high water pressure at the bottom of the river, which caused the shield tail seal to fail, resulting in slurry leakage at the shield tail."

"Furthermore, in areas with water systems, the soil structure is soft and the pressure varies, and the shield machine cannot be fixed, which may easily cause the shield tunnel to shift, or even create gaps, colluding with the Pearl River!"

"And once the tunnel seeps, the entire underground passage will be collapsed, and even the river bottom will collapse!"

"In addition, the water pressure at the bottom of the river is high, which will easily cause the segments to float up and make it difficult to control the attitude of the shield machine."