Edited by Popular Science Speak loudly.
The Sichuan-Tibet Railway is the second railway connecting the first railway in China since the Qinghai-Tibet Railway. As a world-famous infrastructure power, China has completed countless difficult infrastructure projects, but when the construction of the Sichuan-Tibet Railway was announced, it was collectively ridiculed by the West, believing that China could not complete this road in 100 years, until the last section of the Sichuan-Tibet Line Yalin entered the project implementation stage, and the West completely lost its voice and was completely conquered by China's infrastructure strength.
The total length of the railway is 1,838 km. Construction started in 2014, with a total investment of nearly 300 billion, and has not yet been opened to trafficSo why did China spend a huge amount of money to open up Sichuan-Tibet after it already had the Qinghai-Tibet Railway?Compared with the Qinghai-Tibet Railway, how difficult is the construction of the Sichuan-Tibet line?What is the strategic significance behind it?
Although we already have experience in building the Qinghai-Tibet Railway, to a certain extent, the construction of the Sichuan-Tibet Railway is too difficult, and the entire railway line needs to be crossed from Chengdu in Sichuan Province to the Qinghai-Tibet PlateauSichuan BasinYunnan-Guizhou PlateauTibetan PlateauThree steps, across 7 mountain ranges, 6 rivers, and the geological conditions of the Hengduan Mountains are extremely complex, all over several fault zones and ** belts, not only that, the height difference of the whole line can be described as a deep valley and high cliff, the highest altitude to 4400 meters, the drop of more than 3000 meters, the cumulative climbing height of nearly 14,000 kilometers, and in such a complex terrain geology, the bridge and tunnel project accounts for as high as 81%, such construction difficulty even the Chinese engineers known as the "infrastructure madness", have been in trouble.
Compared with the Qinghai-Tibet Railway, which has relatively gentle terrain, the Sichuan-Tibet Line needs to face all the wayPermafrostAvalancheLandslidesCavesRockburst**BeltAnd so on complex geological conditions, in the world engineering community, ** has always been known as the "forbidden area", and when you set foot on the Sichuan-Tibet line, it is undoubtedly in the face of all kinds of floods and beasts in the forbidden area, just to see these words, you can feel the unprecedented huge construction difficulty. The relevant person in charge of the Sichuan-Tibet railway project once revealedThe great dedication of a person at the expense of one kilometer in a dangerous area is all moving.
Rockburst monitoring. In the Lhasa-Nyingchi section, the construction crew discovered a special phenomenon. The tunnel is located on a plateau at an altitude of 3,572 meters, and the external environment is very cold, the air temperature is usually kept below freezing, but the internal environment is as high as 56, and the rock temperature reaches up to 89You can steam a raw egg without much effort, and not only that, but this one is 16 years longThe 5-kilometer tunnel is a collection of geological problems that pose a great challenge to the construction crew.
The most immediate problem caused by the high temperature environment is construction, and in such an environment, continuous work will be faced if it exceeds 2 hoursChest tightnessDizzinessVomitingEvenFaintingIn order to ensure the smooth progress of the construction, the project department had to use the simplest physical cooling - 200 tons of ice cubes per day by truck, but even so, the temperature in the tunnel is still maintained above 30 degrees Celsius, once the transportation of ice cubes is stopped, it can almost steam people. This shows how small human beings seem in front of nature.
In addition to the effects of high temperatures, the most dangerous is the oneRockburst。Rockburst refers to the phenomenon of sudden failure in the empty rock mass in the deep or tectonic stress area of underground miningAs usual, without any warning, the rocks inside the tunnel burst out, and this phenomenon happened 3-40 times a day, and more than 16,000 times during the entire construction process, without exaggeration,Behind the construction of the Sichuan-Tibet line is the contribution of countless engineers.
As early as the 50s of the 20 th century, China put forward the initiative of "entering Tibet by road."。In the era of material scarcity, China is still gritting its teeth to build the Sichuan-Tibet Highway, which shows how important a good material channel is, and now only relying on the single-track railway of the Qinghai-Tibet Railway, it is not enough to meet the premise of the development of the western region, and the transportation capacity and efficiency are very limited.
With the construction of the Sichuan-Tibet Railway, it will be directly connected to Chengdu, the economic center of the southwest region, and the convenient external transportation can not only bring the input of external capital to the country, but also promote the development and utilization of mineral resources and tourism resources, and change the direction of economic development in the region in one fell swoop。At the same time, the construction process has also trained a large number of railway construction experts and technical personnel, which has undoubtedly injected huge energy into China's infrastructure industry, and even such a harsh environment we can overcome, which also means that in the world, China's ability to build a railway network has been among the top ranks. It will also make the Pan-Asian high-speed rail plan promoted by China go further, and the exchanges between the western region and South Asia and Central Asia will be closer, the development will be more comprehensive, and more opportunities will be ushered in!
"The east is prosperous, and the west is life and death. ”
China, as a traditional landlocked country, no matter fromEcological resourcesSpiritual coreFrom any point of view, the western region is the top priority in determining the strategic value of the country and is where the soul of the country lies.
Ten years have passed since the Belt and Road Initiative, such a project of the century, many aspects of the profound impact on many countries, including China, it not only for the countries to build mutual assistance to bring economic benefits and people's welfare, but also invisibly deepened the profound exchanges between countries, and in the future,The strategic promotion of the Belt and Road Initiative will inevitably start from the west, and the strategic initiative can be achieved through the Qinghai-Tibet Plateau, regardless of competition or opportunity.
For China itself, high-quality Belt and Road cooperation requires intellectual support and strategic determination. The opening of the Sichuan-Tibet high-speed railway will make China's land and the vast west completely connected, and the exchanges between the two regions will be unified through the Sichuan-Tibet line, making each other closer. The unification of the high-speed rail map will surely allow us to gain better advantages in the future development of globalization.
The Sichuan-Tibet Railway, let the world once again see China's epic engineering feats, is China's pride and glory, let us express our high respect for all the engineers involved in the construction of the Sichuan-Tibet Line!