CCTV website news (focus interview): Linzhi is located in the southeastern region of Tibet. In the past, there was no railway here. It took 10 hours to drive from Linzhi to Lhasa. Now, a "Plateau Xintian Road" connects Lhasa. and Linzhi. The design speed of Lalin Railway is 160 kilometers per hour, and the shortest running time from Lhasa to Nyingchi is only 3 hours and 29 minutes. The opening of this line is a microcosm of the great development of my country's railway and transportation in the past ten years. As an important part of the Sichuan-Tibet Railway, the construction of the Lalin Line is unprecedentedly difficult: mountainous areas, plateaus, crossing the Brahmaputra many times, a large number of bridges and tunnels, and complex geological conditions. How was the Lalin Railway built through the mountains? After the opening, what changes has it brought to the lives of people along the route?
On the morning of July 22, 2021, General Secretary Xi Jinping came to Linzhi Railway Station, an important hub of the Sichuan-Tibet Railway. Report and study the relevant issues in depth. General Secretary Xi Jinping attaches great importance to the construction of the Sichuan-Tibet Railway. He pointed out that the planning and construction of the Sichuan-Tibet Railway is a major measure to promote the development of Tibet and improve people's livelihood. It is necessary to build this landmark project in the process of realizing the second centenary goal. Over the years, the builders have practiced the general secretary's entrustment with their own actions.
related data shows that there are more than 100 bridges on this 435.48-kilometer line, and the length of bridges accounts for more than 20% of the total length of the line.
To build railways in mountainous areas, advancing along the river valley is the most economical choice. Therefore, the Lalin Railway has crossed the Brahmaputra 16 times. The Yarlung Zangbo River is winding and twisting, and the geological conditions along the coast are very complex. Before the construction of the Zangmu Yarlung Zangbo River Bridge began, many designers paid hardships for the site selection of the bridge. Chen Kejian, chief designer of
Lalin Railway Bridge, said: "Finally, one day, there is a ridge, although it is a little dangerous, but it can be divided into two sides. It feels like God has reserved such a place for us. It is the only bridge position within the range.” After the location of the bridge was determined, and because the site was too small and there was not enough construction space, the builders decided to use the method of “decomposing first, then assembling” to erect the bridge. bridge.
Chen Kejian said: "First of all, the steel pipe unit is processed in Nyingchi, and then transported to a site 7 kilometers away from the bridge site to be assembled into sections. The maximum weight of a section is 248 tons, and then shipped by water When you arrive at the site, sections are assembled." The
Lalin Railway is located in the southeastern Tibetan valley between the Gangdise Mountains and the Himalayas on the Qinghai-Tibet Plateau. More than 90% of the lines are above 3,000 meters above sea level. Many builders are from the mainland, and the low pressure Hypoxia is another obstacle they face.
Wen Jun, project manager of Lalin Railway, China Railway No. 1 Bureau No. 5 Company, said: "After the construction workers came to the plateau, although they had undergone physical examinations before entering the site, many people still suffered from altitude sickness, so they were better than the mainland in terms of personnel. The reserve has been increased by nearly 30% to ensure the normal construction of the site.”
Lalin Railway also has an unimaginable data, that is, its total length of tunnels reaches 216 kilometers, and many tunnels are buried deeper than 1000 meters. Yu Yu, chief designer of the
Lalin Railway Tunnel, said: "The deeper the tunnel is buried, the greater the pressure underneath and the higher the temperature. In the area of the Brahmaputra, generally every 100 meters of buried depth increases the temperature by 3 degrees Celsius. The tunnel project has a great impact."
Wenjun said: "The temperature of the tunnel exceeded 40 degrees Celsius, and the construction workers had to work in the tunnel almost every two hours. At that time, the temperature outside the tunnel was about minus 5 degrees Celsius. The personnel were sweating profusely, and could only wear a protective suit and vest, carrying ice packs on their backs to cool down, and more than 100 tons of ice cubes were used in the cave every day to cool down.”
tunnel excavation in this environment, There is also a dangerous situation that may be encountered, which is " rockburst ". The so-called "rock burst" refers to the sudden release of energy accumulated in the rock mass under certain conditions, causing the rock to burst and eject.
Yu Yu said: "The distance of its ejection can be long or short, as short as a few meters, and some can reach tens of meters. At such a high speed, these rocksAfter the block is ejected, it will cause great harm to the personnel and mechanical equipment working inside. "
Wenjun said: "We have increased the protection measures for personnel and equipment, equipped construction personnel with explosion-proof helmets and special protective clothing, and added steel plate welding and section steel welding protective frames to construction equipment, so as to ensure the normal construction. conduct. ”
On June 20, 2020, as a landmark project of the Lalin Railway, the main beam of the Zangmu Yarlung Zangbo River Bridge was successfully closed. The railway was officially opened, which is the result of six years of hard work by more than 100,000 builders. Haburi is a Tibetan college student. According to his memory, his uncle used to drive goods from Nyingchi to Lhasa, and it is estimated that it will take about 10 hours. He could be reached, but his family didn't hear from him until it was dark.
Haburi said: "His car broke down when he arrived at the foot of Mila Mountain , the weather was bad and there was no signal there, and it was early in the morning. He just waited for the next car and towed his car to his destination. Now there will be no such situation, because after the opening of the Lalin Railway, it will only take three and a half hours to go from Nyingchi to to Lhasa at the fastest.
Quji Dolma, Secretary of the Party Committee of Gongbu, a non-public enterprise in Bayi District, Linzhi City, Tibet, said: "Due to the remote geographical location, the road is not convenient, and the transportation costs of road and air transportation are relatively high. Specialties cannot be shipped in time. Now that it is open to traffic, we can ship Tibetan fragrant pigs, Tibetan eggs, Tibetan medicines, wild matsutake mushrooms, etc. produced in our hometown to all parts of the country in large quantities. "
On June 25th this year, the Lalin Line opened for a whole year, and Linzhi Station witnessed the changes that have taken place here.
China Railway Qinghai-Tibet Group Co., Ltd. Linzhi Station Director Zhu Lianxiang said: "The Lalin Railway operates by virtue of The advantages of fast speed and short duration have made it a normal practice for the people of Shannan and Nyingchi to travel by Fuxing. In the past year, Nyingchi Railway Station transported 293,000 passengers. "
After the Lalin Railway was put into operation, many builders invested in the construction of the section from Ya'an to Nyingchi, and continued to fight to complete the construction of the Sichuan-Tibet Railway. The history of railways, and after the opening of the Sichuan-Tibet Railway, it will be a new scene. People's travel time will be greatly reduced, and freight capacity will also be greatly improved. On the roof of the world, builders have experienced unprecedented challenges. At the same time, they have also created a miracle that has attracted worldwide attention. In the past ten years, China's railways and highways have increased by about 1.1 million kilometers. The coverage rate of high-speed railways and highways in cities with a population of more than 200,000 exceeds 95%.
By the end of 2021, the national railway operating mileage will reach 150,000 kilometers, including 40,000 kilometers of high-speed railways. The density of the road network will reach 55 kilometers per 100 square kilometers, an increase of 24.6% over 2012.
In the past ten years, civil aviation has built and relocated transport airports There are 82 airports, and the total number of airports has reached 250; more than 3,000 new routes have been added, and the total number of routes has reached 5,581. By the end of 2021, the navigable mileage of China's inland waterways will reach 128,000 kilometers; there will be 20,867 production wharf berths, including 10,000-ton and The above 2,659 berths have basically formed world-class port groups such as the Yangtze River Delta, Tianjin-Hebei, Guangdong, Hong Kong and Macao. China has moved from a transportation powerhouse to a transportation powerhouse. The Hubei Daily client pays attention to major events in Hubei and the world, and not only pushes for users Authoritative policy interpretation, fresh hot information, practical and convenient information, and also launched a series of special functions such as handheld newspaper reading, reporting, learning, online interaction, etc.
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