The tunnel of the domestic section of the China Laos Railway has finally been opened, how many days

This railway lasted more than 1,500 days and is an important railway connecting China and Laos, showing the deep friendship between China and Laos, so this tunnel in China is called the Friendship Tunnel.

On September 13, 2020, the tunnel of the domestic section of the China-Laos Railway was officially opened to traffic, and after 1,543 days of working day and night by more than 1,200 workers, the construction of the China-Laos Railway was completed, adding another touch of green to China's railway construction.

It took 1,543 days to build the project by 1,200 builders over a long period of time.

On the morning of September 13, after 1,543 days of hard work, the friendship tunnel of the China-Laos-Kunming (Ming) Wan (Xiang) Railway was safely completed. So far, the tunnel project of the domestic section of the China-Laos Railway has been completed, laying the foundation for the completion and opening of the whole line.

The China-Laos Friendship Tunnel was safely completed and lasted 1,543 days. In the hard work of the builders, the tunnel was safely penetrated, laying the foundation for the completion and opening of the whole line.

Summary. 3. The China-Laos Railway Tunnel and the Xishuangbanna Tunnel are connected to benefit the well-being of the people. The China-Laos Railway connects Kunming, China, and Vientiane, Laos, with a total length of more than 1,000 kilometers.

The main line of the Chinese section is 414 kilometers long in Laos, and the design speed is 160 kilometers per hour for the general speed railway, which is a national railway-level electrified railway. The total investment of the project is 100 million yuan, and the construction period is 5 years.

With a total investment of 40% jointly invested by the two countries, it is the first international railway with Chinese investment and construction, the whole line adopts Chinese technical standards, uses Chinese equipment and is directly connected to China's railway network, and will be completed and opened to traffic by the end of 2021. After completion and opening to traffic, it will only take about 3 hours from Kunming City in Yunnan Province to Jinghong City in Xishuangbanna Dai Autonomous Prefecture.

The favorable impact of the more China-Laos railway tunnels.

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1. The China-Laos Railway Tunnel is a breakthrough of the Yuxi-Mohan section of the China-Laos Kunxi-Ming-Vientiane Railway, and the Hele Tunnel is creating conditions for the construction of bridge erection and track laying. The tunnel is the first long tunnel at the northernmost end of the Yuxi-Mohan Railway, and is known as the "Yukou" tunnel of the Chinese section of the China-Laos Railway by the builders.

2. It provides a guarantee for China's "Belt and Road" initiative. There are 93 tunnels and 136 bridges in the Chinese section of the China-Laos Railway, from Yuxi to Mohan Railway, with a ratio of bridges and tunnels. At present, the whole line base, bridge Liangshan, tunnel sock key lead road project has been completed, of which, 65 of the 93 tunnels have been completed, 3, the China-Laos railway tunnel and the Xishuangbanna tunnel have been connected, benefiting the well-being of the people.

The China-Laos Railway connects Kunming, China, and Vientiane, Laos, with a total length of more than 1,000 kilometers. The main line of the Chinese section is 414 kilometers long, and the design speed is 160 kilometers per hour, which is a national railway-level electrified railway. The total investment of the project is 100 million yuan, and the construction period is 5 years.

With a total investment of 40% jointly invested by the two countries, it is the first international railway to be built with Chinese investment as the main investment, the whole line is converted to China using Chinese technical standards, using Chinese equipment and directly connected to China's railway network, and will be completed and opened to traffic by the end of 2021. After completion and opening to traffic, it will only take about 3 hours from Kunming City in Yunnan Province to Jinghong City in Xishuangbanna Dai Autonomous Prefecture.

4. The China-Laos Railway Fighting Youyun Road Tunnel will provide a strong boost to the economic development of Laos. China and Laos have always maintained a good foundation of the best relations between the grinding and grinding, but also to provide great support and help for the construction of Laos' railway, for the two countries to build a bridge channel, will bring a strong boost to the economic development of the regions along the line.

The 173-meter Humaling Tunnel of the Lanyu Railway took 6 years to open up, and there is a reason why it took so long

In September 2008, the Lanyu Railway Project officially started. After completion, it will run through Gansu and Chongqing, with a total distance of 800km, passing through 22 counties and cities in Gansu, Shaanxi, Sichuan and Chongqing along the way.

Although the journey is not long, the difficulty of construction should not be underestimated, because there are many mountains and rivers to pass along the way, so there are as many as 200 tunnels and 300 bridges alone. Tunneling under normal conditions is not a particularly difficult task, but if it is, it is necessary to"Water-rich silty fine sand"A tunnel is drilled in the stratum, that's another story. Digging a tunnel in such geological conditions is like digging a hole in a tofu brain, and if you are not careful, the entire section may collapse.

Punch holes in the tofu brain"The most typical example is the Humaling Tunnel in Lanzhou, Gansu Province, which can be said to live up to its name"The ghost gate is closed"。

The finely crushed rock mass is like powder, and without exquisite technology, let alone open a tunnel, even if you take a stone from it, there is a danger of collapse.

This section is 173 meters"The devil is sad"The mountain does give us a difficulty, because the soil is too loose, I don't dare to pull the shovel vigorously, even the top abroad"Specialists"There is nothing to be done. And the most infuriating thing is that they just sit idly by, but they start to gloat, those"Specialists"I just want to see our jokes.

At this time, the expert Xia Li came to the construction site, and he and his father Fu Xiahua were appointed to serve as the chief engineer and surveyor of the Humaling Tunnel. They took over the No. 1 inclined shaft and the No. 2 inclined shaft, which were the most difficult to build, and the two wells were 173 meters apart, which was very difficult to get through, and the construction personnel were helpless and shook their heads again and again.

But Xia Li just had the strength to not admit defeat, he rose to the challenge and vowed to get through this last paragraph.

Xia Li thought about it carefully, and finally created a new name for the first time"Nine-square grid operation method"The technology perfectly solves this world problem. So-called"Nine-square grid operation method"It is to divide a large working face into zero, separate 9 small working faces, and excavate at the same time, and carefully complete the excavation task of each working face under the condition of ensuring the stability of the rock formation.

In June 2017, after six years of working day and night, the last section of the Humaling Tunnel was opened. Three months later, the Lanyu Railway was completed in its entirety, and trains roared through what was once called"The ghost gate is closed"The Humaling Tunnel.

And one person's name will forever go down in history, and that is the expert"Xia Li"。

Everyone cheered and admired the expert Xia Li. The news soon spread abroad, and those who were once invincible wanted to see our jokes"Specialists"Dumbfounded, surprised, and ashamed at the same time, they were ashamed and embarrassed, and this time they were slapped in the face again.

The completion of the Lanyu Railway condenses the hard work and sweat of our construction personnel, and also engraves the wisdom and courage of the experts, highlighting the spirit of great craftsmen. At the same time, let there be"Infrastructure Maniacs"The Chinese builders, known as the Chinese builders, are once again well-known abroad, go to the world, praise them!

Recently, the Lanyu Railway Humaling Tunnel has been on the hot search, the reason why this tunnel can be on the hot search, is because China, which is known as the infrastructure madman, took six years to successfully open this tunnel, and this tunnel is actually less than 180 meters in length, and now the train only takes about four seconds to pass, but it did take six full years when it was built, which is actually because the construction of the Lanyu Railway Humaling Tunnel is too difficult, and there are countless landslides inside. At that time, it also went through a lot of design and tribulation to successfully complete this task, which was praised as impossible by foreign experts.

First of all, according to the engineer, in the Humaling Tunnel of the Lanyu Railway, there will basically be a collapse of about one meter, that is to say, the 173-meter tunnel will face at least 173 collapses, such a tunnel, not to mention the construction is very dangerous, the progress is also very, very slow, almost a construction will be stopped for many days, such a huge difficulty also makes the construction of the Humaling Tunnel of the Lanyu Railway become a recognized unachievable task. Even foreign experts believe that this tunnel will not be possible.

Second, although the Humaling Tunnel of the Lanzhou-Chongqing Railway is an unlikely task, when is China's infrastructure not completing the impossible task? After so many years, only China has become an infrastructure maniac, and only many of China's infrastructure have become world-renowned projects, so the construction of the Humaling Tunnel of the Lanzhou-Chongqing Railway has not been abandoned.

According to the data, the construction team also failed again and again at that time, and gradually found experience, and finally relied on experience and excellent technology to slowly repair the tunnel.

Finally, the 173-meter-long Humaling Tunnel of the Lanyu Railway is only four or five seconds old when the train passes through now, but behind it is the hard work of countless engineers and designers for more than 2,000 days and nights.

Maybe it's because there's so much dirt here, so you have to spend a lot of time to get through here.

Some tunnels are located in remote locations, and tunnels require certain tools, and personnel travel is also a problem, and it took six years to complete over time.

Why did it take 6 years for the train to pass through the tunnel in 5 seconds, the first tunnel to pass through was a mountain, and he had to take safety as the premise to ensure that the premise would not collapse. Second, the drill bit for exploring the mountain is very expensive.

The longest railway tunnel in China, the Taihang Mountain Tunnel, is a total length of kilometers.

China's longest highway tunnel, the Qinling Zhongnanshan Tunnel, is designed with two tunnels and two lanes up and down, with a total length of 18,004 kilometers in a single tunnel.

China's longest railway tunnel - the Qinghai-Tibet Railway Xinguanjiaoshan Tunnel, with a total length of kilometers, is the world's highest and longest railway tunnel! Secondly, there are kilometers of Taihang Mountain tunnels.

Guanjiao Tunnel in Tianjun County, Qinghai Province 32,605m Sig Double Tunnel, under construction.

West Qinling Tunnel Wudu District, Longnan City, Gansu Province 28,236m Lanyu Railway Double Cave, under construction.

Taihang Mountain Tunnel The downlink line is 27,839m, and the uplink line is 27,848m, and the Shitaike special double cave has been opened to traffic (at the junction of Hebei-Shanxi provinces).

It takes 40 seconds for a train to cross a 180-meter-long bridge and 48 seconds to cross a 300-meter tunnel at the same speed, and this train has a speed of 15 meters and a length of 420 meters.

The calculation process is as follows:

The speed of the train is:

15 (ms).

The length of the train is: 15 40-180 = 600-180 = 420 (m) so the speed of this train is 15 m sec with a length of 420 m.

47 seconds, (930 + 245) 25 = 47, the train passes through the tunnel of 930 meters completely plus its own length.

Each tunnel duration is indefinite and consists of a variety of factors.

Tunnel refers to the passage dug in the existing building or earth and stone structure, which is used for three-dimensional traffic, crossing mountains and mountains, underground passages, crossing rivers, crossing the sea, pipeline transportation, cable undergrounding, water conservancy projects, etc.

The tunnel construction period is generally to do a good job in the preliminary work, to see what the length of the tunnel is, how big it is, the nature of its use, the general tunnel is basically stone, although there is mechanical help, but it is still very dangerous, generally dig two meters to reinforce it in order to operate in the next step, can not be dug through the reinforcement at one time, are dug and reinforced in the digging, so the tunnel is to be dug for several years.

Tunnels are classified by kind:

1. According to the geological conditions of the tunnel: soil tunnel and stone tunnel.

2. According to the length of the tunnel: short tunnel (railway tunnel regulations: l 500m; Highway Tunnel Regulations:

l 500m), medium and long tunnels (railway tunnel regulations: 5003, according to the International Tunnelling Association (ITA) definition of the size of the cross-sectional area of the tunnel: very small section tunnel (2 3), small section tunnel (3 10), medium section tunnel (10 50), large section tunnel (50 100) and extra-large section tunnel (greater than 100).

That colleague knows how long the Nanyangshan tunnel is to build and tell Ha Thank you, the cave is close to opening! All opened to traffic in November, Lanzhou to Linxia about 1 hour and 20 minutes.