"Frozen ground?"

Mr. Liu and Mr. Ouyang were stunned for a moment, and glanced at each other, but they didn't expect Shucheng to pop out of the frozen soil!

The problem of frozen soil has been plaguing the domestic railway subgrade designers, and the country wants to open up the sky road, precisely because the frozen soil problem has not been solved, and a section has not been connected. Pen & Fun & Pavilion www.biquge.info

If Shucheng's guess is correct, the design institute is now working hard to solve the problem of plateau permafrost. Three years after the construction of the high-speed railway, the last section of the Tianlu plan was really closed, and the permafrost difficulties were also overcome at that time.

"You know about permafrost?" Liu Lao said with a surprised look.

At this time, everyone couldn't stand it, so they got three Mazha and asked Shu Cheng to accompany Liu Lao and Mr. Ouyang to sit down and discuss there.

As for the other members, some of the big leaders also had Mazha to sit down, and as for some project managers such as Lei Jun, because Maza was not enough, they could only stand.

So there was a very strange phenomenon at the scene, a large group of leaders were sitting, among them there was Shu Cheng, when Song Guanglin, the chief engineer of the fourth department, arrived at the scene, he thought he was wrong.

Liu Changzheng, the deputy commander of the company, and Kong Xu, the chief engineer, were all standing on the side, and Shucheng was actually sitting in Mazha, chatting with the two old men, and it seemed that the conversation was quite pleasant.

"I've heard that the country has always wanted to open up the road to heaven, so I also pay attention to the plateau permafrost, and I have also seen some foreign events about the construction of railways on the permafrost." Since he had already said that he had leaked his mouth, Shu Cheng could only say it head-on.

But this time, Shu Cheng didn't dare to say it too quickly, for fear of saying some ways to solve the frozen soil matter, the ghost knows if these methods have been studied now, if they are not studied, it will be in big trouble at that time.

The so-called frozen soil is that in winter, it will freeze and form a whole hard state, and at this time, there is no problem with the situation of the railway above.

However, with the increase of temperature, the shape of the permafrost will change, become soft and deformed, and there is no bearing capacity at all, so it is unrealistic to build a railway on it, because once the railway is deformed, it will not be able to drive, and even the line will twist and sink.

The permafrost contains a lot of water under the plateau, and in winter, this water will solidify into ice and consolidate, but in summer, it is normal for the ice near the surface to melt because of the sun.

It is completely unrealistic to build a railway in such a place.

It is also unrealistic to build bridges in such places, because many places are perennial frozen soil, with a depth of more than 100 meters, and the budget for building bridges in these places is absolutely astronomical, and it must be constructed in winter, because these areas are difficult to enter in summer.

One of the most important reasons is that once these frozen soils are destroyed, it is very likely to have a chain reaction, and it will be more troublesome for construction at that time!

This is one of the reasons why the Pilgrim's Road has been stranded.

"It seems that Xiao Shu is quite broad, recently we are also studying the plateau permafrost in terms of design, Xiao Shu you will talk about how to deal with the permafrost problem with your ideas and contact information, and provide some of your ideas." The more Liu Lao looked at Shucheng, the more satisfied he became, and said to Shucheng.

For the problem of frozen soil, Liu Lao has little hope for Shucheng, just now the new roadbed protection, can still think of these methods, but the plateau frozen soil, has not experienced the first line, it is difficult to imagine, to solve these problems difficult!

Under the convening of Liu Lao, the design institute has set up a team of more than 30 people to conduct research on the plateau permafrost for three years.

In Liu Lao's opinion, Shu Cheng is still young after all, and he has studied this aspect, and it is already very good to have ideas in this regard, but it is quite difficult to really ask the other party to put forward feasible suggestions.

If the plateau permafrost had been so easy to solve, the heavenly roads would have been connected a long time ago.

"Liu Lao, what does the design institute want to do with the frozen soil now?" Shu Cheng asked.

"In fact, if the depth of the frozen soil is not deep, the bridge can be solved, the key is a section, the depth of the permafrost is accumulated, the depth is too large, the budget for building bridges is too large, and the excavation is not realistic, it is really not possible, only a detour, but to bypass the frozen soil area, the line is extended too much, and the budget consumed is too large." Liu Lao sighed.

Liu Lao said, Shu Cheng nodded, these are indeed facts.

Shu Cheng pondered for a moment and said, "Old Liu, in fact, I've always been curious, since it's best not to disturb the frozen soil, why do we have to disturb it, just let the frozen soil stay in this state forever, isn't it good?" ”

"Preserving the original form of the permafrost?" Mr. Ouyang frowned slightly.

"In fact, the method you said has also been discussed by our design institute, but it is not so simple to retain the original form of the frozen soil." Liu Lao said.

When Shu Cheng heard this, he saw that Liu Lao actually considered this, but he was not surprised, after all, in terms of roadbed, people are big guys.

In fact, the treatment of frozen soil in later generations is to control the soil temperature and use some special equipment to melt the frozen soil under the roadbed because of the increase in temperature!

In this way, the frozen soil will remain frozen all year round, and there will be no thawing of the frozen soil and deformation of the roadbed.

In this way, the construction of a railway on it can solve the problems of settlement caused by the thawing of permafrost and the deformation of the tracks.

"Tell me what you think about how to preserve the frozen soil in its original state." After pondering for a while, Liu Lao raised his head and said to Shu Cheng.

At this time, the core content of the problem is really deepened. For this aspect of the content, Shu Cheng does know how to solve it, but he can't say it, once he says it, what will Liu Lao and Mr. Ouyang think of themselves, and they don't think they are demons.

After sorting out his thoughts, Shu Cheng spoke: "Old Liu, in fact, I have been guessing that the refrigerator can control the internal temperature, why can't we wrap the roadbed with something, and then control the temperature in this area through electricity or other facilities?" ”

When Shu Cheng said this, it was actually an assumption, because the plateau roadbed was controlled by constant temperature, and Shu Cheng had no other way but to use the refrigerator, because he found that he couldn't find anything else that could be used as an example.

"Ice... Refrigerator? Mr. Ouyang was stunned, he didn't expect Shu Cheng to give such an example, this thing sounds a little awkward.

This railway embankment has a few cents to do with the refrigerator, perhaps because of the mindset, Mr. Ouyang does not have this association.

When Liu Lao heard Shu Cheng's words, he pondered for a long time before he looked up at Shu Cheng and praised with a smile: "I really don't know what you have in your head, we only think about not disturbing the original roadbed, but we can't keep a large area of frozen soil at the original temperature, which is completely unrealistic." Therefore, there has been little progress in research in this area. ”

For this problem, Shucheng has also heard that in the early stage of the investigation, the design institute did consider a large area of cooling, and control the temperature of the frozen soil in summer, but the frozen soil in a place is tens of hundreds of kilometers in a radius, and you can't keep them in a constant state all the time, which is completely unrealistic.

Even if it can be done, the consumption in this area is not something that ordinary people can imagine, it is better to let the railway bypass, or drill hundreds of meters of pile foundation for support.

Of course, drilling into a pile foundation of several hundred meters, is also completely unrealistic, and now there is no talk of dry pile foundation hundreds of meters, this is not one or two, it is hundreds of thousands, and it has to be done until the year of the monkey.

Besides, such a construction will inevitably affect the frozen soil, which is not a long-term solution.

Now Shucheng's idea is very simple, can you wrap the roadbed within the line in a box, and then cool down this box, so that even if this box has heat dissipation, the consumption is also countable, and it can be replenished!

So it seems that the problem can be solved?

"Listening to you say this, theoretically speaking, it should be feasible, but what will happen in practice, it is still unknown, and it needs to go through a lot of experimental research until safety is ensured, and on-site construction can be carried out. But what you said to me to suggest a method, this method is worth scrutinizing, after I go back, I will discuss with that group of old guys, listen to their opinions, if the test section is really successful, Comrade Xiaoshu, on behalf of our designers, thank you. Liu Lao said very seriously.

"Liu Lao, I don't dare to take this seriously, I'm just guessing, as for whether it will work or not, you have to really practice, after all, practice is the best way to verify the truth." Shu Cheng didn't dare to hold it up, and hurriedly said modestly.

"Comrade Xiao Shu, don't be modest, a suggestion is very likely to shorten our research time for several years, my old bones, I can see the road to heaven before I go, and I can also look at it." Liu Lao sighed.

The railway connection, known as the Heavenly Road, has always been the wish of DG, and it is also the long-cherished wish of Liu Lao.

For so many years, the problem of permafrost has been plaguing well-known designers in domestic design institutes, but there has been little progress.

"Teacher, your body is still strong, the Heavenly Road Project, soon, you will definitely be able to break through." Mr. Ouyang saw that Liu Lao was a little excited, and hurriedly reassured.

"Teacher, why don't you come here in the morning, it's already past eleven o'clock, let's eat first, and after eating, how about discussing with Xiao Shu?" Mr. Ouyang suggested.

From nine o'clock to the present, except for the road from the second part to the first part, Liu Lao is walking and riding Mazha at other times.

Liu Lao is now seventy-eight years old, and the perennial overtime work makes him look older, and it is not easy to hold on for so long.

Therefore, Mr. Ouyang took the opportunity to interrupt the conversation between the two and made such a suggestion.

"Okay, then let's eat first, and we'll talk when the time comes." Liu Lao said reluctantly.

So, everyone finally began to clean up, and the place to eat had already been arranged, just now Li Haifu asked Mr. Ouyang, and Mr. Ouyang requested.

Everyone got into the car one after another, Shu Cheng looked at Liu Lao's back, and sighed secretly, there is only so much he can help, as for the result, it depends on the test results of Liu Lao and others, after all, the technical work is not said by mouth, it needs to be proved by practice. (To be continued.) )