Video spoilers history, starting with the blitzkrieg on Poland

The sky continues.

[It can be seen that it is quite difficult to build such a large-scale railway in a plateau environment. ]

【But we know that the Qinghai-Tibet Railway was eventually built successfully. 】

[So, how did our country solve this impossible task? ]

【First, the frozen soil problem. 】

[Traditional frozen soil railways adopt a "passive insulation" strategy, such as laying insulation materials under the roadbed, but this can only delay the melting of frozen soil and cannot solve the problem. ]

[Chinese engineers went the other way and proposed the concept of "active cooling" - keeping the frozen soil at a low temperature forever.]

[Because after a large number of experiments, it was found that frozen soil is relatively stable at -2°C. ]

[Temperatures above this may have an impact on the railway.]

【The builders used a lot of insulation boards.】

[The insulation board can effectively prevent heat transfer and keep the frozen soil in a low temperature and stable state. ]

[It's like putting a thick cotton-padded jacket on the frozen soil. ]

【At the same time, the heat sink also plays an important role. 】

[The heat sink is like a small air conditioner. When the temperature of the frozen soil rises, it can dissipate the heat and maintain the stability of the frozen soil.]

[According to statistics, the incidence of frozen soil diseases has been reduced by more than 80% on roads that use insulation boards and heat sinks.]

[In areas where the permafrost is most unstable, bridges are built directly.]

[Let the railway float in the air to prevent the melting of frozen soil from affecting the roadbed. ]

[For example, the Qingshui River Bridge, the longest bridge on the Qinghai-Tibet Railway, is 11.7 kilometers long and was built to avoid frozen soil.]

[Additionally, a gravel ventilated roadbed is used, a gravel layer is laid in the roadbed, and air convection is used to dissipate heat. ]

[These innovations have made the permafrost section of the Qinghai-Tibet Railway far more stable than similar projects abroad.]

[The train can reach speeds of over 100 kilometers per hour, far exceeding the 60-kilometer speed limit on Russia's Siberian Railway.]

【The second is the issue of survival in the plateau. 】

[In order to cope with plateau hypoxia, China has established the world's most intensive plateau medical network along the railway. ]

[A medical point is set up every 10 kilometers, and hyperbaric oxygen chambers are installed along the entire line. 】

[The construction camp is equipped with a hyperbaric oxygen chamber, and construction workers go in regularly to breathe oxygen to relieve altitude sickness.]

[In the Fenghuoshan Tunnel at an altitude of 4905 meters, China has developed the world's first plateau oxygen generator. ]

[It can produce 24 cubic meters of oxygen per hour, bringing the oxygen content in the tunnel close to the level of the plain. ]

[In addition, all workers must undergo a step-by-step adaptation process before taking up their posts.]

【Train at low altitudes first, then gradually move to the plateau to avoid acute mountain sickness. 】

[These measures have miraculously achieved “zero deaths from altitude sickness” in the construction of the Qinghai-Tibet Railway, setting a record in the history of world engineering]

Outside the sky.

Tang Dynasty.

Li Shimin saw the picture on the sky curtain, where workers were working hard in the plateau environment.

See the cooling rods along the railway line.

See the carefully designed railway infrastructure routes.

Although Li Shimin himself was not a professional road construction talent.

But I still couldn't help but marvel at the ingenuity of the road construction.

"Exquisite, wonderful! It turns out that on the Tibetan plateau, it is possible to build roads like this?"

"Wearing a cotton jacket on Lu, how did you come up with this idea?"

“He’s simply a genius!”

After seeing the top-notch logistical support measures during the construction process, Li Shimin also thought of his uncle.

"Uncle Guangshen, look at China in the future. They also need super projects."

"But their engineering was carefully considered."

“How hard are you working on logistics?”

"The Sui Dynasty you took over was at least a prosperous dynasty. It's not like it can't survive."

"Why were you so anxious at the beginning?"

……

The sky curtain also continues.

【The third is ecological protection.】

[In order to protect the plateau ecology, China has made unprecedented adjustments in railway design:]

[In order to reduce damage to the grassland, they cut the turf into small pieces and stored them properly.]

[After the rails are laid, the turf will be laid back on the slope.]

[Since the roots and attached soil of the turf were not seriously damaged, the turf gradually recovered under the nourishment of rain.]

[According to statistics, the survival rate of turf transplantation along the Qinghai-Tibet Railway has reached over 90%.]

[In order to protect the migration routes of wild animals, builders set up dozens of wildlife passages along the railway. ]

[Some of these passages are in the form of culverts, and some are in the form of bridges, allowing wild animals to cross the railway freely.] [After the railway was put into operation, the population of Tibetan antelopes did not decrease but increased, proving that these measures are indeed effective.]

[During the construction process, in order to protect Namtso, a sacred lake in the eyes of the Tibetan people, a detour of more than 70 kilometers was deliberately made.]

[According to statistics, the environmental protection investment during the construction of the Qinghai-Tibet Railway reached 20 billion yuan, accounting for 8% of the total investment of the project. ]

【It is the railway with the highest environmental protection standards in China. 】

[So, after spending so much effort to build the Qinghai-Tibet Railway, what has changed? ]

【On July 2006, 7, the Qinghai-Tibet Railway was fully opened to traffic. 】

[This railway not only ended the history of Tibet without trains, but also profoundly changed the fate of Tibet. ]

[After the railway was opened to traffic, the number of tourists in Tibet soared from 2005 million in 180 to 2019 million in 4000, and the GDP grew by more than 10% annually. ]

[75% of the materials entering Tibet are transported by rail, reducing freight costs by half.]

【The prices in Tibet have been effectively reduced. 】

[Tibet's GDP has increased from 2006 billion yuan in 342.19 to 2023 billion yuan in 2430.07, with an average annual growth rate remaining at a high level]

【At the strategic level, railways have greatly improved the logistical supply capabilities of the Chinese military. 】

[The time required to transport supplies to the border has been shortened from several weeks to just a few days.]

[The construction of the Qinghai-Tibet Railway is not only an engineering miracle, but also a manifestation of a country's will. ]

[It proves China's engineering and technological strength in extreme environments.]

【It also demonstrates the country's firm commitment to border development and national unity. 】

【A railway.】

[To some extent, it can also represent the determination of a rising country! 】

……

The video ends here, and comments start to fly out:
This is indeed a magical road to heaven!

"Salute to the workers who built the Qinghai-Tibet Railway!"

《Salute to every Chinese railway soldier! 》

"Comrades! If you ask us where we are going, we will go to where the motherland needs us most...Comrades, let's take big steps forward. The railway soldiers have great ambitions!"

"Hot Rod is such a classic, I remember this test point."

《Does the heat sink need to be replaced? 》

"As long as it doesn't leak, it doesn't need to be replaced. It's very similar to the copper pipes in a computer."

"I recommend you to watch the TV series Snowy Sky Road, which is about the Qinghai-Tibet Plateau Railway. "

"Now there are even high-speed trains."

"I took this ride once last year and was really shocked when I passed by the Cuo Lake. It was like a paradise on earth."

"There is a question on Zhihu: What has the Qinghai-Tibet Railway brought to the people in the snowy areas, besides material things?"

"Besides material things"? It's obvious that the author of this thread is not holding back his fart! "

"The classic "putting the facts aside", this is what it looks like."

"I have seen that question. Many of the answers below are from local people. I was really moved after reading their answers..."

"Outside the window is nature's masterpiece, inside the window is China's masterpiece!"

"I advise all foreign experts not to make hasty conclusions about the Chinese people."

"Strategic Railway! The three brothers on the border are eyeing you covetously. If you are not strong, they will not show mercy!"

When will the Sichuan-Tibet Railway be completed?

And outside the sky.

During the Qin Dynasty, Ying Zheng stood with his hands behind his back.

His eyes were fixed on the image of the Qinghai-Tibet Railway on the sky, and he couldn't help but feel amazed and envious.

"This railway is truly miraculous, it was built in such a high and steep place."

“And the construction process is so exquisite.”

"Who would have thought that Lu could wear clothes?"

"I have traveled across the world and unified the six kingdoms. I have seen countless wonders, but I have never imagined that there would be such a grand project in the world."

"This railway stretches for thousands of miles, shuttling between snow-capped mountains. If our Great Qin had such technology, why would we worry about not being able to govern the territory more firmly?"

"But I also know..." Ying Zheng couldn't help but smile at himself.

"The Qinghai-Tibet Railway has a complex terrain, is high and cold, and lacks oxygen. The transportation of materials and the allocation of manpower are both big problems."

"At present, Daqin does not have the ability to build straight roads and galloping roads on the snowy plateau."

"I heard from Tianmu that the construction of this kind of railway is inseparable from the railway troops?"

"This is similar to the Lingnan Army of our Great Qin..."

Next to Ying Zheng, Fusu couldn't stop exclaiming in amazement.

“Only difficulties can make a person great.”

"As long as you have determination and wisdom, there is nothing you can't accomplish."

"There is still much, much more that the Qin Dynasty can learn from China in the future..." (End of this chapter)