1966, May.

The atmosphere in the capital has become even more oppressive.

The streets are full of young men wearing green military hats, green uniforms, and armed belts around their waists.

They keep an eye on their surroundings and will immediately correct suspicious people.

On May Day, Yan Jiecheng and his family took their children to Lao Chang's house.

Today, Chang Kexin's eldest brother Chang Sheng has returned to Beijing, and Yan Jiecheng met this eldest brother for the first time.

In his thirties, his face was full of stories.

Seeing people, he was very affectionate, patted Yan Jiecheng's shoulder and shouted to his brother-in-law.

If his hand strength was a little smaller, Yan Jiecheng would probably really believe in his enthusiasm.

Although there is a revenge on Yan Jiecheng, it is really good for the two children.

This time I came from the south and brought a lot of gifts for the children.

This time, his work has been transferred, and he needs to report to the relevant places, so he has the opportunity to go home.

A few years ago, he had been fighting in the south, and now he is a deputy division commander.

This time he came back, it was said that it was a newly established branch of the army, and he was assigned a position as a battalion commander.

In the Chang family's study, Yan Jiecheng heard his uncle say the name of the new unit, and he knew that he, the battalion commander, was not a loss, but definitely made a lot of money.

I didn't expect that my eldest brother was still a mother's family.

Their new unit is specifically responsible for Miss Qiu's marriage.

Therefore, it can be regarded as a peer with Yan Jiecheng, and they are all engaged in transportation.

It's just that the eldest brother's family is doing express delivery, and the service attitude is good, and there has never been a bad review, and a mission must be achieved.

After talking about the eldest brother, Lao Chang said to Yan Jiecheng seriously: "You, keep a low profile during this time, and I won't come here often in the future." ”

Yan Jiecheng knew Lao Chang's recent situation, compared with Minister Lu, Lao Chang's life during this time was simply not human, it was too intense and tormenting.

Many people have been innocently implicated, and they are in the hands of the local government.

This is a test of human nature.

Nowadays, these people are often walking on thin ice, carefully maintaining the balance of all parties.

It is obvious that they are doing this to the dissatisfaction of all parties.

The above is already dissatisfied with him, all kinds of beating.

It's a hard time.

After Yan Jiecheng and his wife went home, they put the two children to sleep.

Chang Kexin leaned on Yan Jiecheng's shoulder and said softly, "When do you say this kind of day is a head?" ”

Yan Jiecheng thought about it, the most drastic was the first two years, and after 68 years, it was actually a lot more peaceful.

So he comforted: "It's okay, it won't be like this all the time, we have to believe in the organization." ”

All the disturbances in the world can't stop the lives of workers.

After May Day, Yan Jiecheng was sent on a business trip to the south of Caiyun.

This time, he went out to inspect on behalf of the department, mainly to inspect the construction of the Kunming Railway and sum up some experience.

The Chengdu-Kunming Railway is also a good thing and has experienced three ups and three downs.

In 53 years, after the trekking survey and geological research of the line selection experts, the Chengdu-Kunming Railway Project has formed three major line plans: the west line, the middle line and the east line.

In March of the same year, when the Chengdu-Kunming railway plan was decided, the experts led by Luo Gong and the woolly bear experts had a fierce dispute on the direction of the line.

The middle line plan insisted by Mao Xiong experts passed through Shuicheng Coal Mine, with short mileage, small project, short investment, fast benefits, and close to the Dongchuan Copper Mine that was about to be developed at that time.

The western route scheme supported by Luo Gong has the longest mileage, complex geology and steep terrain, sparsely populated and scarce products, passing through many areas with few singing and dancing.

However, the areas through which the Western Route passes are rich in untapped minerals and other natural resources, which can provide opportunities to develop the regional economy.

It was very important for the later development of the country, so Luo Gong advocated the Western Front plan.

However, due to the influence of the domestic implementation of the policy of learning from the woolly bear, the middle line scheme was adopted in the early stage of the construction of the Chengdu-Kunming Railway.

In 54 years, the preliminary design scheme according to the technical standards of the Maoxiong Railway was immediately sent to the capital for identification.

In June of the same year, the rich mineral resources of the ferry were confirmed, which promoted the Chengdu-Kunming Railway to switch to Luogong's western route plan.

In 58 years, the Chengdu-Kunming Railway Project was divided into the north and south ends of Xichang for preliminary testing and preliminary design, and the construction documents for key projects such as the Cheng'e section of the line and the Shamulata Tunnel were completed.

In July of the same year, the Chengdu-Kunming Railway Chengdu-Emei section started construction.

Later, due to the domestic economic situation, there was no later.

The start of work is a stoppage, so Luo Gong is idle and has nothing to do, and goes to the rolling mill to be responsible for the upgrading of the line.

This year, the construction of this railway is really on the right track, and Yan Jiecheng looked at the report materials, and the number of construction personnel alone reached more than 359,700 during the same period.

As many as a county in later generations.

This line has gone through so many twists and turns, so the ministry asked the inspection team headed by Yan Jiecheng to check the construction situation.

Of course, the construction of the Guikun line is also within the scope of their inspection.

Minister Lu also explained some things to Yan Jiecheng in private.

It's not something to be seen for, it's just to ask him to pay attention to the work of the road bureau along the way.

Let's take a look at the specific situation of the impact on the operation of the road bureau.

Yan Jiecheng promised on his lips, but he resisted in his heart.

He's going to have a lot of names as experts.

Construction Safety Specialist, Accident Investigation Specialist, Railway Design Specialist, Railway Construction Expert.

He knew that soon they would be affected by the experts.

It's the so-called pretending to be cool for a while, and the crematorium afterwards.

On this business trip, Yan Jiecheng and them were all honest, and they didn't have the feeling of being a leader from the capital at all.

I was also cautious when I saw the young man, for fear of being cleaned up.

The journey along the way was miserable.

They didn't dare to sit on the sleeper, they were all small benches and hard seats.

Along the way, there was a miasma, and the transportation was more or less affected to varying degrees.

The dining car on the car also lost those delicate side dishes, which were all deliberately made difficult to eat. Millet porridge also has stones in it, so be careful when eating.

The beautiful name: bittersweet memories!

Next to the meal, there was a teenage girl staring at everyone.

Anyone who dares to dislike the food is not delicious will be scolded at least and taken away at worst.

On the train, from time to time, there are young people in the carriage, criticizing and abusing passengers.

Everyone also pretended not to care, and the people who cared had already been cleaned up.

They are all teenagers and half-sizes, and no one dares to give their lives to these people.

When it comes to the destination, the atmosphere here is relatively normal.

On the construction site, most of them belong to the railway corps, and the discipline is still very strong.

The person in charge of this project is high-level and terrifying, even if they Minister Lu comes, they still need to salute.

Therefore, Yan Jiecheng didn't dare to disturb them.

A group of them went directly to the construction site to check.

Of course, everyone is also learning and communicating with the technicians on the construction site.

Yan Jiecheng and these technicians really admire these construction personnel.

This is the Central Yunnan Plateau, which is known as the railway forbidden area.

According to the current technology, breaking this eternal isolation between steep mountains and rivers is undoubtedly a difficult long march.

The railroad soldiers opened the mountain and split the rocks on the edge of the cliff, and behind them was an abyss, and they used their flesh and blood to forge this road.

These people are now completely trained, and they have all participated in the previous line selection, design and construction.

Therefore, they can be said to be the mainstay of the railway construction industry.

"Team Leader Yan, I really didn't expect that they would actually build a bridge in such a dangerous place."

The members of the inspection team who came together looked at the Yingshui River Bridge in front of them and said.

After hearing this, Yan Jiecheng also sighed: "This idea is simply incredible, breathtaking? ”

Yan Xie Cheng saw that some people in the group didn't understand, so he said, "Don't just look at the location of this bridge, look at its structure. ”

As he spoke, Yan Jiecheng pointed to the bridge and said, "This is the new structure, the new process, and the new material.

Compared with the steel riveted girders of the same span, the weight of this bridge can be effectively reduced by 30%.

What is this concept?

In other words, while reducing the steel material by 30%, it also increases the load. ”

Others don't know, Yan Jiecheng knows the technology of this bridge at a glance.

The bridge is built using the bolt-welded beam method, which can be connected without a single rivet and by spiral connections.

The successful construction of the Yingshui River Bridge is not only a thing worth celebrating for the railway soldiers.

For our entire bridge construction industry, it is also worth celebrating.

It marks the complete success of China's first trial construction of bolt-welded beam bridges.

Since then, China's bridge construction has mastered a new technology.

After listening to Yan Jiecheng's words, the members of the group asked Yan Jiecheng to tell everyone about this structure.

As a technician, since everyone asked, Yan Jiecheng also told everyone.

"The total length of this bridge is 203.4m, and the main hole is a 112m bolt-welded rigid beam flexible arch composite system.

The north and south side holes are 24m and 40m respectively for the steel truss.

The flexible arch rib line type is a secondary parabola, with an arch span of 96m and a vector of 1:6.

The rigid beam truss is 8m high, the internode length is 8m, and the truss center distance is 5.75m.

The oblique rod and arch rib at the end of the beam are box-shaped sections, and the other rods are H-shaped sections.

The main truss, longitudinal and transverse beams and coupling systems are made of 16mn bridge steel, with a maximum thickness of 24mm.

The steel beam is installed using the temporary pier semi-cantilever assembly method.

After the rigid beam of the whole bridge is assembled, the camber is adjusted, and then the arch rib and the boom are assembled; Then adjust the reaction force of the two temporary piers, so that the internal force of the arch rib reaches the design value, and then the arch is formally connected. ”

After listening to Yan Jiecheng's explanation, everyone was also a little shocked, this structure was too ingenious.

If Yan Jiecheng was asked to evaluate this bridge, Yan Jiecheng would only want to say one word.

Industry style.

Road and bridge trends.

Elite in the industry.

World famous bridges.

Of course, these days, it was not only the Yingshui River Bridge that surprised Yan Jiecheng and them.

The route spans the snow-capped mountains, canyons, jungles and other complex landforms of Shuzhong and Yunnan.

Yan Jiecheng wished to call it one of the most dangerous railway lines on earth.

The railway has a slope of more than 1,000 kilometers and a maximum climb of 5.9%, the most famous of which is the central Yunnan region between the Sichuan-Chongqing region and Dali in Yunnan.

The slope is 5.9%, and many people may not know what the concept is.

But Yan Jiecheng knew that the design code for urban rail transit and railways in later generations stipulated that the maximum slope was 3.5%.

One can imagine how difficult it was to build this railway.

These days, Yan Jiecheng has had a lot of deep exchanges with these builders.

Everyone is doing technology, there are not so many twists and turns, and when it comes to technology, they are all open and honest.

Just as Yan Jiecheng thought, the engineers here are facing unprecedented tests in the construction of the Chengdu-Kunming Railway.

Such as bad weather, cliffs, geological disasters, etc.

They even had to build piers and flying ropeways to support the planned bridges and tunnels.

At the same time, it has to compete with summer floods and mudslides.

So when Yan Jiecheng and their inspection team left, Yan Jiecheng said to the local engineer who was in charge of the work: "You are great, you have created amazing miracles. ”

In his report to the ministry, he truthfully recorded all this, and he made no secret of his admiration for all the personnel of the Chengkun Line.

In the report, he said that the Chengkun Line is a miracle in the history of human architecture, and wrote his own views on this line.

Yan Jiecheng wrote that this would be an extremely difficult project in history.

It will surely become one of the models in the history of China's railway construction and one of the amazing architectural miracles in the world.

Looking at Yan Jiecheng's report, none of the people in the inspection team refuted it, and they also signed behind Yan Jiecheng's name.

Of course, in addition to these proud achievements.

There was also something that made Yan Jiecheng collapse for a while.

The construction of this railway was too miserable.

It can be said that it is made of flesh and blood.

According to Yan Jiecheng's understanding during this time, too many lives were sacrificed for this railway.

On average, three or four lives are lost in one kilometer of the line.

You know, this railway is 1,200 kilometers.

Yan Jiecheng silently gave these people a name in his heart: the person who built the ladder.

This cannot be said to be a production accident at all.

This is collective martyrdom.

Because everybody knew there was going to be sacrifice, and they all scrambled to get ahead.

This made Yan Jiecheng very touched.

The group spent more than a month online.

It was not until the beginning of August that he returned to the capital.

The atmosphere in the capital remains tense.

Yan Jiecheng asked Minister Lu several times to report the results of the investigation, but he couldn't find anyone.

Only later did I learn that they had been taken away for education.

It's scary to think about, some of the young people in the ministry have formed their own organizations.

At the beginning, they were big yard disciples, and these people were full of passion for their careers.

Later, there were some children who also followed suit.

Their biggest preference is to pull Minister Lu to study.

The head of a dignified department, but to suffer such a thing, it is also sad to think about it.

Director Dai Zhuo's son Dai Mao is now the leader of it, and he has severed relations with Director Dai.

At first, Lao Dai could still throw a few teacups and get angry, but then he probably mourned more than he died, and the whole person lost his former spirit, and he looked silent every day when he stayed in the ministry.

The ministry's general adjustment room is completely ruined.

They can't move any trains anymore, and it has become the norm to stop trains on rails across the country.

Some lines have even been interrupted for dozens of hours.

It's messed up, it's all messed up.

It's a mess in the ministry all day long. r All of them have no backbone, and their work is perfunctory.