Seeing this situation, Professor Jin went to Yan Jiecheng and explained the situation to Yan Jiecheng.
It turns out that the tunnel design drawings were not independently designed by Professor Jin and others.
They just improved the old drawings.
After Professor Jin’s detailed explanation, Yan Jiecheng understood that in October 1956, Mao Xiong sent experts to help us build the subway.
The bear experts who came to the capital at that time were all experts involved in the construction of the Moscow subway and had rich practical experience.
As soon as they arrived in the capital, they began to work on the subway construction.
They first spent a lot of time inspecting, measuring, and surveying the terrain of bJ.
Determine where the subway can be built, determine the route of the subway, and how to connect the new city with the old city.
In addition, the subway is underground after all, and higher safety must be considered to prevent collapse.
Therefore, strict planning was carried out for the depth, tunnel, and structure selection of the subway construction.
Moreover, the underground structure is complex and changeable, including sewers, underground water systems, loose soil, etc. These are all factors that need to be considered when building a subway.
With the help of experts from Mao Xiong and after a long period of inspection and survey, the China Railway Corporation Subway Engineering Bureau was officially established in 1958 and prepared to start building the subway.
Unfortunately, the good times did not last long.
In those three years, due to serious mistakes and widespread natural disasters, the country fell into a serious economic disaster.
It is said that food is the most important thing for the people, and only by filling their stomachs can they have the strength to work, not to mention the huge cost and labor volume of subway construction.
Therefore, the construction of the subway had to be temporarily stopped.
Until last year, the economy had gradually eased and the country had passed the most difficult moment.
For transportation and military defense. Therefore, the project was restarted and construction of the unfinished subway continued.
After listening to Professor Jin's words, Yan Jiecheng understood why these people doubted him.
These days, domestic technology is lagging behind, so we all learn from our teacher, Mao Xiong.
Yan Jiecheng actually said that there was something wrong with the tunnel drawings designed by Mao Xiong experts. Without even thinking about it, Yan Jiecheng must have been wrong.
It can’t be that Teacher Mao Xiong is wrong, right?
Yan Jiecheng also understands this very well.
At the same time, he also knew that if his own judgment was correct, it would mean that all more than 30,000 drawings related to the structure would have to be revised.
This is very cruel to the technicians who have been working hard for a long time.
However, science cannot be taken lightly.
Yan Jiecheng set out to prove that his theory was correct.
Several trucks were requested from the headquarters to pull people from the tunnel design office to the first three water channels under construction.
Just when everyone was puzzled, Yan Jiecheng conducted an experiment.
The cross-section of this water channel is a straight cross-section. Yan Jiecheng made a projection of these sections onto a flat surface.
The technicians at the tunnel design office could easily see that the projection difference was twenty to thirty centimeters.
After Yan Jiecheng's experiment, these people were so surprised that they couldn't help themselves.
They never expected that the woolly bear expert would make a mistake.
The facts were right in front of them, and they had no choice but to agree with Yan Jiecheng's theory.
I had no choice but to bury my head in the sand and quickly change the picture.
After three months of hard work by everyone, all 30,000 drawings have been revised, and the original planned start date has naturally been delayed.
Fortunately, the higher authorities allowed mistakes to be made and did not hold the Tunnel Design Department accountable.
This subway was a combat readiness project, and Yan Jiecheng did not dare to delay it for a day. After he organized people to review the revised plans, he reported the situation to the commander-in-chief.
The commander-in-chief directly called the heads of several construction units on site and announced the start of construction.
As for the review of construction unit drawings, according to the commander-in-chief's wishes, let them review while construction is underway.
The construction units are mainly several units including the 12th Railway Corps Division, Metro Engineering Bureau, and Beijing City Urban Construction Bureau.
None of them raised any objections, and the real construction began naturally.
After all, it's nothing to them. They often encounter that kind of three-sided project, so it doesn't count.
As the chief designer, Yan Jiecheng knows very well how abnormal this subway is.
This thing really can't be called a subway, it's simply an underground fortress, with all kinds of dark rooms underground.
The subway is designed according to the highest standards of three defenses, which can prevent atomic radiation, chemicals and bacteria.
Every door underground is made of the same sealing material as a submarine.
This line also connects the Xishan garrison station and the Beijing Railway Station.
Can transport troops quickly.
Yan Jiecheng secretly calculated that during wartime, the built Beijing subway could transport the troops of 5 army reorganized divisions from Xishan to the urban area every day.
Thinking of this, Yan Jiecheng was shocked.
Why do you want to commit suicide?
Although as the chief designer, I actually know almost everything I should know.
But it’s best not to know this terrible thing.
However, Yan Jiecheng also knew that it would take several years for this project to be partially declassified.
The information I know is completely rotten in my heart.
It will be changed later, and Yan Jiecheng will probably be restricted from leaving the country.
Even if there were no restrictions, Yan Jiecheng would not dare to go out. After going out, he would definitely be remembered by many people.
There’s no telling if I’ll be able to come back!
With the review of the drawings completed, the Beijing Metro quietly began full-scale construction.
Because this tunnel is buried shallowly, open cut and cover construction is used for on-site construction, and it will be filled after construction is completed.
After the main structure design was completed, Yan Jiecheng turned his attention to aspects such as electromechanical, electric power, communications, signals and interior decoration.
Of course, he also needs to communicate with the tunnel construction unit at any time to understand their on-site construction conditions.
Except for the necessary staff from the Tunnel Design Office of the Design Department, everyone else was transferred to the construction site.
Yan Jiecheng thought that completing the design would make his work easier.
As a result, I am even busier now.
In particular, professionally designed solutions such as electromechanical ones made a domestic mass manufacturer very desperate.
Everyone shouted: I can't do it.
Yan Jiecheng communicates with these factories every day to negotiate and resolve these technical problems.
These problems are really a headache. For example, when installing a vertical ladder in a limited underground space, the motor provided by the manufacturer is too large and there is no place to install it.
This requires him to contact new cooperating units, or ask the original factory to step up technology research and development and specially manufacture motors suitable for their projects.
Chang Kexin has become pregnant these days.
The third aunt is worried about her daughter-in-law, or maybe she is worried about the child in her belly.
After cooking for the family in the afternoon, she would go to the small courtyard to cook for Chang Kexin and Yan Jiedi.
As for Yan Jiecheng, he comes home very late every time.
It is difficult to take care of his wife.
Although he felt ashamed, there was nothing he could do about it.
On this day, Yan Jiecheng went on a business trip with comrades related to civil air defense facilities to visit the Third Steel Rolling Plant in Beijing.
Their project requires waterproof, fireproof, poison-proof, and smoke-proof doors, and they need to be produced near the capital.
Therefore, everyone came to the steel rolling mill with drawings to assign tasks.
The Beijing subway is a key military project, and all factories in the capital need to cooperate.
Naturally, the headquarters sent a driver to drive this time.
Sitting in the car, Yan Jiecheng looked at the environment around the steel rolling mill and felt filled with emotion.
When the car arrived at the gate of the steel rolling mill, the doorman was still Uncle Yang.
When the old man saw the car approaching, he quickly walked out of the duty room. The driver stopped the car and was about to negotiate.
Yan Jiecheng said, "Xiao Wu, let me go and talk to him."
After Yan Jiecheng finished speaking, he opened the car door and got out.
He turned to Old Man Yang and said, "Uncle Yang, it's me, Yan Jiecheng."
As he said that, he took out his cigarettes and handed one to the other party.
When the old man saw Yan Jiecheng taking out his cigarette, he suddenly remembered. After all these years of guarding the door, the action of taking out a cigarette still depends on Yan Jiecheng.
The action of buttoning the rope is so vivid in my memory.
Old Man Yang took Yan Jiecheng's cigarette and said with a smile: "It's you, kid. I heard they said you have become a cadre."
When Yan Jiecheng saw this old man, he felt particularly friendly.
He lit a cigarette for himself and said with a smile, "It's all about serving the people."
The old man laughed after hearing this.
He could tell that although Yan Jiecheng's smile was not serious, his tone was sincere.
At this moment, Director Yang and others from the steel rolling mill arrived at the door.
When he came here before, Yan Jiecheng had already called the steel rolling mill, so Director Yang had already asked the security department to pay attention to the situation at the door.
So when I got the news, I hurried out.
The old man Yan Jiecheng shouted: "Minister Yan, Minister Yan, you are welcome to come back to guide the work."
Seeing Director Yang's enthusiasm, Yan Jiecheng also went up to him and said, "Director Yang, you are my old boss. You are here to go back to your parents' home today, so I don't dare to offend you."
As they spoke, the two of them shook hands warmly.
Everyone walked into the factory together.
When they arrived at the conference room, Yan Jiecheng saw that Director Yang and Secretary Yang were both there.
He asked his fellow driver Xiao Wu to act as a guard and guard at the door.
Seeing Director Yang's and his others' expressions change, Yan Jiecheng said, "Director Yang, you should also know the purpose of our visit."
Factory Director Yang said: "Today the bureau gave us a notice, asking us to do our best to cooperate with the higher authorities."
Factory Director Yang actually knew very little. Today, the city bureau leader only told him that the person coming was Minister Yan and asked him to cooperate. Don’t ask more questions.
Therefore, he did not know Yan Jiecheng's current specific situation and the specific purpose of coming.
The Yan Jiecheng he knew was also the director of the Railway General Cadre Training Academy.
Seeing this, Yan Jiecheng motioned to the accompanying technicians.
The comrade, seeing Yan Jiecheng's signal, took out a document from his bag and handed it to Director Yang.
After reading it, Director Yang handed it to Secretary Yang aside.
After seeing the two of them reading it, they both clearly understood the value of this document.
Knowing this, they had to actively cooperate, so they all became very serious.
Yan Jiecheng then said: "Now that you two have understood the situation, let me tell you our requirements."
Afterwards, Yan Jiecheng asked the accompanying technicians to give the drawings of the civil air defense door to Director Yang and explained the requirements to the two of them.
However, these two are not professionals and do not know much about technology.
Therefore, this technical explanation stopped.
Director Yang apologized to Yan Jiecheng and the others and asked Secretary Yang to accompany them.
I quickly organized a reliable technical team to complete the technical explanation work.
Factory Director Yang is very capable. He organized the technical team in half an hour and brought it to the conference room.
Yan Jiecheng was a little surprised to see that Yi Zhonghai was included in the technical team of the steel rolling mill.
But thinking about it, as a newly promoted eighth-level fitter in the steel rolling mill, it is normal for Yi Zhonghai to participate in it.
Yi Zhonghai was also stunned when he saw Yan Jiecheng sitting in the main seat.
As an eighth-level fitter, he always walks with his head raised in the factory.
He felt successful.
But when he saw Yan Jiecheng, who was sitting in the main seat, looking at these people with a scrutinizing gaze, his heart suddenly felt like a deflated ball, and he followed everyone to sit down obediently.
"Dear leaders, this is the technical backbone of our factory. Our technical briefing can continue."
Yan Jiecheng nodded, and the technicians on the side immediately told the people at the steel rolling mill about the size, thickness, steel type, steel plate strength, and work tolerance requirements of the civil air defense doors.
These technicians and some old masters in the steel rolling mill couldn't help but be speechless when they heard the request.
This is really demanding!
Yan Jiecheng looked at these people carefully and saw that their faces were normal. It seemed that there were no enemy agents.
Yan Jiecheng believed that Factory Director Yang knew what he was looking for and was looking for employees with a clean foundation.
In fact, it doesn't matter even if there are enemy agents.
After all, this door defense is just some iron doors. What can you do if you know it?
After the explanation, Yan Jiecheng and the others have not left yet. They are waiting for an internal meeting in the steel rolling mill to discuss the results.
If Director Yang can't take the job, Yan Jiecheng and the others will need to go to another rolling mill.
About half an hour later, Director Yang quickly walked to the conference room where Yan Jiecheng and the others were resting.
He said, "I'm sorry to have kept you waiting for so long, Director Yan. Our factory technicians have just demonstrated that these security doors can be made in our factory."
After hearing this, Yan Jiecheng smiled and said, "Then I'll trouble you."
Yan Jiecheng turned to look at his colleagues who were coming with him, and said with a smile: "Now that this person's matter of guarding the door has been settled, let's go without disturbing Factory Director Yang and his colleagues."
After hearing Yan Jiecheng's words, several people got up and prepared to leave.
When Factory Director Yang saw it, he quickly said: "Minister Yan, leaders, you see it's dinner time. You will also miss the meal when you go back. Why don't you just make do with it in our factory."
What Factory Director Yang said makes sense. It's indeed meal time, and there should be no food when we return to the headquarters.
So everyone looked at Yan Jiecheng. After all, he was the leader, so he still had to make the decision on this matter.
Yan Jiecheng looked at his watch and said, "That's troublesome."
Director Yang said happily: "It's not troublesome, it's just a small matter."
Although Yan Jiecheng decided to have lunch at the steel rolling mill, he still couldn't save the necessary procedures.
Then he took out some money stamps, handed them to Director Yang and said, "These are our food stamps and food expenses at noon. Please accept them, Director Yang."
Lao Yang likes to win over people with the food in the cafeteria. How could he accept it?
Yan Jiecheng finally said, if you don't accept the food stamps and money, we won't eat, so Director Yang accepted it.
Now that Yan Jiecheng is looking forward to his official career, he also knows how to cherish feathers, so how can he still be greedy for such small advantages as before.
Director Yang collected the things and went to arrange lunch.
When several people saw that Yan Jiecheng had paid for them, they quickly said, "Mr. Yan, this is my money ticket."
Yan Jiecheng smiled and said, "Just think of it as me treating you to a meal."
Several people listened. They were all senior technicians. They didn't care about the small amount of money, so they didn't object and thanked Yan Jiecheng.
