Courtyard light

Chapter 307 Tunnel Boring Machine (Second Update)
"We are specifically engaged in manufacturing, and we often deal with iron lumps." Liu Hai looked at his arms, which were indeed thicker than others.

"Last time I went to a compound, the cadres there were not good enough." The person in charge of guidance should have been a miner in the past.

Liu Hai and a few young people are digging the soil below. This is the same as digging a tunnel. It is not very wide, about 1.8 meters wide. If you dig twenty or thirty centimeters, you need to support a five centimeter thick wooden board at the top. There are wooden squares under the planks, and cylindrical wooden supports under the wooden squares.

There should be some support under the wood, and ventilation holes should be set up.

Erzhuzi heard this and was unconvinced, but now Erzhuzi was always on guard to keep his mouth shut.

But when he was working, Erzhuzi was like going crazy and kept working hard.

The excavated soil was transported out in baskets, and then there were women and other people transporting it to the tricycles outside the door.

"If it doesn't work, just get out of the way, you are grinding!" Xu Damao just came up and dug a few times, and then he felt that it was not working anymore. His hands were weak, and the second pillar was next to him, and he said angrily.

Liu Hai didn't know why Erzhuzi and Xu Damao got together, they just couldn't stand each other.

"Come! If you have the ability, come!" Xu Damao also threw away the things in his hand in anger.

"You are like this, and you still want to be a cadre?" Erzhuzi picked up the tools and continued digging.

I encountered a lot of copper coins, debris and broken tiles among the things I excavated, so it was difficult to dig in this place, and I used a mining pickaxe. Sometimes it seems that there is no problem, but if I dig hard, it might not work. Bounce up.

"This is the most difficult thing to dig. When we are mining, we encounter the interlayer of stone and sand, which is also a headache." The technician in charge of the guidance also said.

The young and strong men took turns digging underneath, then took down the wood and the like and dug forward bit by bit.

At noon, everyone in the yard gathers money to eat together, that is, each person contributes some food stamps or something, and the meal is cooked in the yard.

Nowadays, when visiting other people's homes, you often have to get food stamps. Food stamps are hard currency at this time.

At noon, Liu Hai and several people were all dirty. Several people were sitting at the same table. Liu Hai, Er Zhuzi, Xu Damao, the boss of the second uncle's family, the boss of the third uncle's family, and several other technicians responsible for guidance were also here. table.

What he ate was pig offal stewed with radish. The pig offal was brought back by Liu Hai from Dahongmen Meat Factory in the morning.

"You guys live a good life in this courtyard, and we are very united. When we went to the courtyard two days ago, they each ate their own food, and they even quarreled while working." The person in charge of guidance spoke while drinking.

At this table, Liu Hai is the only one who doesn’t drink. Even the second uncle’s boss wants to drink.

At this time, as long as boys reach a certain age and drink, no one will stop them. Some children drink and the adults show off when they go out.

"Most of the neighbors have some conflicts." Liu Hai said.

Xu Damao's lover came over with a bowl and put some pieces of meat into Xu Damao's bowl. Erzhuzi saw this scene from the side and was extremely depressed.

I have to say that Xu Damao has good taste. Teacher Ran must be tall and tall. Although his appearance is not very good, it is different when paired with the status of the teacher.

Teachers are very respected at this time, and parents of students will greet the teacher affectionately when they see them on the street.

Moreover, students at this time are afraid of teachers. If students are naughty and disobedient, they are really beaten. If they are beaten by the teacher in school, they dare not say anything when they go home. If they do, they will be beaten again by their parents.

After Teacher Ran made this move, several other married people with lovers also came to put meat in their men's bowls. Their bangs were so angry that they ate a mouthful of dog food.

When working in the afternoon, Erzhuzi stood up to Xu Damao and kept saying that Xu Damao was not a man and was not good enough.

Xu Damao was told that he gritted his teeth and insisted. The more this happened, the more trouble the second pillar got.

At the end of the night, when Xu Damao came out, he felt unsteady when walking.

After dinner in the evening, the second uncle assigned another task, that is, everyone would dig for two hours after get off work every day, and try to dig out all the vegetable cellars in the yard within a week.

Another thing happened that night, that is, the third uncle stole the wooden boards to be used to build a vegetable cellar, but was discovered by the second pillar, and he was almost sent to the police station.

In the end, the second uncle made the decision and asked the third uncle to look at the materials. If the materials were missing, the third uncle would be responsible.

Liu Hai was also speechless. He was sleeping well, but he was woken up just because of this.

The next day, Liu Hai arrived at the maintenance department, picked up a stack of drawings and reported to the leader.

Sun Aiguo didn't seem to have slept well either. He was probably digging the vegetable cellar when he got home from get off work.

"Director." Liu Hai called at the door before going in.

"Xiao Liu, you're here, sit down quickly, you are a rare visitor. It's been a long time since I came to my office." Sun Aiguo knew that Liu Hai must have something urgent to do with him, so he poured tea for Liu Hai first, and then said.

Liu Hai put down the information, quickly picked up the tea cup, and then poured the water for himself by Sun Aiguo. He said: "I dug the cellar yesterday. I have some ideas and I want to report it to the leader."

"Tell me about it?" Sun Aiguo's eyes lit up when he heard this.

"Boss, I want to build a tunnel boring machine here." Liu Hai didn't say anything about a shield machine or anything like that.

"Tell me carefully." Sun Aiguo didn't know what a tunnel boring machine was. When he heard the name, he knew it was unusual, so he quickly asked Liu Hai to explain.

Liu Hai took out a few drawings. These were just a few simple drawings for easy introduction.

"Tunnel boring machines are specialized in digging tunnels. They were first used in the 19th century. They can be used to build subways and dig tunnels...!" Liu Hai took out a picture and pointed at it to introduce it to Sun Aiguo.

After half an hour of introduction, Sun Aiguo understood that this thing was definitely a good thing.

"How sure are you of this?" Sun Aiguo finally asked.

"This mechanical system is not complicated. It is mainly composed of hydraulic equipment and the modules of the tunnel wall behind it. It is just a little more complicated to operate. In addition, it may not be as fast as blasting the tunnel."

"But there are also advantages. The first is that it is very safe. The second is that if an explosion is used to excavate a tunnel, the stone wall will explode and cause cracks. And I believe that with the development of technology, this equipment may eventually be developed into a fully automatic equipment." In fact, the current tunnel boring machine is simply not as fast as drilling holes and firing blasts.Why are TBMs so popular in the future?On the one hand, it is related to the large-scale construction of subways at that time. After all, most of the areas under the subway are dirt, and a safe operating environment is needed.

Moreover, most of the subways are under the city. The safety factor of equipment such as shield machines is much higher. If other methods of excavation are used alone, it is likely to cause surrounding collapse or other situations.

In addition, there are restrictions on explosives, as well as the safety risks of gunfire, and after the shield machine, the tunnel is basically formed in one go, which can greatly shorten the construction period.

"Since you have confidence, then do it." Sun Aiguo made the decision directly after hearing this.

"Whatever you want to study over there, just do it yourself. You can arrange your own time, and I won't arrange any tasks for you here." Sun Aiguo is still expanding production because of the high demand for many things produced here. They are all very big, and the products of motorcycle factories are basically exported now.

The excavators produced by other factories in the mainland are all different. They are mainly supplied domestically, and the products exported to other countries with good friends are all produced by motorcycle factories.

And according to the wishes of the leaders above, we are expected to return to the United Nations General Assembly in the next few years.

It can be said that the motorcycle factory has a greater contribution. The motorcycle factory exports products to brotherly countries, such as exporting a batch of excavators and Sibei. The brotherly countries get the mines and then sell the excavated ores to us. It is basically barter. supplies, and then we give more mining equipment to our brother countries.

These brotherly countries like these construction machines very much. After all, mining is definitely more profitable than farming.

After Liu Hai finished his report, he returned to the maintenance department and took out the aircraft engine drawings.

"Section Chief? What is the purpose of this engine layout?" Li Dali and others asked strangely when they saw the drawings Liu Hai took out.

"This is an opposed piston engine, mainly used for aircraft." Liu Hai said very calmly.

Li Dali and others were stunned and asked in disbelief: "Section Chief, are we going to build an airplane?"

"Keep your voice down. This aircraft has been used internationally for many years. Let's give it a try first. If it works, it will be great." Liu Hai quickly told several people to keep quiet.

The people in the maintenance department nodded excitedly when they heard this.

"Go to work and remember to keep it secret." Liu Hai asked a few people to make relevant parts of the aircraft.

As for wings and the like, Liu Hai is not in a hurry. Once two engines are manufactured, one will be tested and the other will be used to build airplanes.

The wings and fuselage are all made of plywood, which is mainly for low cost.

Such piston engines are actually used in a wide range of applications. Even in 2020, because the cost of use is very low, they are widely used in patrol, fire protection, agriculture, sightseeing, etc., and this kind of engine has an extremely long life, and some have been used Still in use for decades.

Nowadays, anything that can fly in China is considered good, and piston engines are not a problem at all.

Liu Hai is planning to design a shield machine. The shield machine mainly consists of the hydraulic system and the cutting tool on the front. These two are the core.

Nowadays, semi-automatic vehicles do not have high electrification system requirements at all.

The degree of automation behind it is high, and it actually replaces manual work to a large extent.

While Liu Hai was secretly building an airplane here, details about the assault gun finally came out.

The superior leaders were very concerned about the situation of the assault guns, so the unit leaders took a brief look at the information when they got it and then reported it.

"The results of the actual combat verification of the assault gun surprised us. It is simply great. Especially this low-light night vision sighting system, which is many times more advanced than the big brother's infrared headlight system. I recommend that this technology be included in the list. Top secret, otherwise some people might..." The leaders of the army are bloody, and they are also very disgusted with Big Brother's increasingly bad attitude.

The superior leader was reading the information and nodded: "Then it will be classified as top secret. The new one from Big Brother is not a good thing. He has often targeted us in the past."

Today's leaders already have the awareness of confidentiality. The reason why there was no such awareness in history is because nothing is as confidential as others, and it has no great effect.

However, historically, key areas were kept secret from Big Brother, such as mushrooms in the Northwest. Although Big Brother's planes often came over to take a look, the specific situation was not reported to Big Brother.

As for the earthquake monitoring system, which was developed in the 70s when the boss and the second boss were at their fiercest, there is no earthquake monitoring system yet.

"The lifespan of the gun barrel has also reached the world's advanced level. It can still be used after 800 rounds, which greatly reduces the maintenance costs of our tanks."

"In addition, this automatic loading system can be used on larger artillery to develop our self-propelled artillery."

"Also, this engine material technology can be applied to our tanks, and it is expected to increase the service life of the tank engine."

"The assault gun is fast and equipped with special armor-piercing projectiles. No matter which tank is hit, there is no chance of survival."

"I suggest manufacturing a large number of assault guns. Of course, tanks are also needed. In the worst case, we will have to fight against the opponent."

"In addition, Comrade Xiao Liu also designed two other models, one is a crawler model. I suggest that we also make a batch of this type and send it to the plateau."

"There is also an amphibious one, which is also the best for amphibious landing operations."

"Can amphibious vehicles drive directly from the sea?" When the superior leader heard this, he asked in disbelief.

"There is no test data yet. It is judged based on the parameters designed by Comrade Xiao Liu. If the sea conditions are not very complicated, it is completely OK. If the sea conditions are too complicated, it is still not possible. However, there is no big problem at all in inland rivers and lakes."

"Do it, we must do it!" The superior leader said immediately after hearing this.

"My suggestion is also to do this. With this kind of amphibious assault gun, rivers and other things can basically not restrict us." The troop leader also nodded.

"In addition, Comrade Xiao Liu has also done some research on armor. He has designed a kind of composite armor, which is to mix two layers of other materials in the middle of ordinary armor. The relevant units are currently studying it."

"Comrade Xiao Liu is really an all-rounder." When the superiors heard this, they also praised him greatly.

"Comrade Xiao Liu, I found that he is good at discovering the advantages of things. Assault vehicles were widely used during World War II. However, after the end of World War II, assault vehicles were abandoned by other countries. After Comrade Xiao Liu improved the ammunition, assault vehicles If nothing else happens, it will definitely occupy a place in the war in the future.”

"Which factory is going to produce this assault vehicle?" the superior leader asked again.

(End of this chapter)