Behind the scenes technology company

Chapter 78 Open to Traffic (Updated)
The hustle and bustle on the Internet did not affect the people who built the tunnel between the mountains, and they were building the most difficult tunnel to lay the magnetic levitation track.

China's high-speed rail network coverage for several years is inseparable from the construction and maintenance of railway personnel, who have built a bridge for communication between various regions.Most of the time, we joked that the country approved the construction of a high-speed railway from a certain place to a certain place. After planning the route and adding a few hundred million details, the high-speed railway line connecting the two places was built.But the hardships and dedication of the railway people are more in places we can't see.

In the face of complex and changeable terrain restrictions, mountains are opened when encountering mountains, and bridges are built when encountering water.The simple eight characters are faced with various complex problems. Bridges and tunnels are the crystallization of human wisdom in architectural engineering.It is also because of bridges and tunnels that more natural dangers are no longer obstacles, but magnificent natural scenery.

The maglev train belongs to the Huaxia High-speed Railway. The high-speed railway is a high-speed railway. According to relevant international regulations, a train with a speed of more than 200km/h is a high-speed railway. Another saying is that it reaches more than 250km/h.The running speed of the maglev train has reached 1000km/h, and the travel time from Kyoto to the Western Regions is estimated to be 2 hours and 30 minutes.

We can regard the maglev train technology as a small part of the whole high-speed rail technology. The high-speed rail technology is a huge system. The maglev train technology alone is only the upgrade and evolution of the high-speed rail technology, including railway construction technology, train manufacturing technology, and information collection. technology, scheduling control technology, operation management technology and maintenance technology, etc.

Today, high-speed rail has spread all over the country, and the former green leather trains have gradually disappeared. Although people in small cities and small towns have been affected by the suspension of trains and stations for a period of time, and the inconvenience of travel, With ten years of development, more efficient travel methods have connected the entire land of China.

Maglev train technology is the next development direction of high-speed rail technology. In terms of railway construction, train manufacturing, and repair and maintenance, superconducting materials have brought new upgrades, but the changes in operation management, information collection, and dispatch control are not so great. obvious.First of all, in terms of railway construction, superconducting maglev trains still rely on rails to achieve transportation connectivity. Compared with traditional track laying, the single-track two-way transportation mode makes superconducting maglev trains stand out among many next-generation train technologies.

This is a joint increase in speed and turnover, and superconducting materials are the cornerstone of this technology.On the basis of superconducting materials, the Huaxia Academy of Sciences and relevant railway departments have developed a new type of magnetic levitation track and a new type of train.After going through a series of route planning approval processes, the construction of the east-west line began.

The railway people began to trek across mountains and rivers. The construction of a [-]-kilometer track can not be completed with only the track, but more engineering and technical support is needed. The railway people are faced with complex terrain and changeable climate. The laying of the track on the ground became a problem before them, so the viaduct appeared.

Huaxia has the world's most comprehensive bridge design and construction technology and modern construction equipment. It can be said that in terms of bridge construction, the country's strong capabilities are beyond doubt. There are various reasons for adopting the viaduct structure. The viaduct greatly reduces the demand for land and saves a lot of cost in terms of land acquisition costs. Secondly, it gets rid of the terrain restrictions to a certain extent and lays the foundation for the laying of the track.

The most critical point is the construction speed. With the continuous development of science and technology, the mature technical application of viaducts can allow factories all over the country to carry out the prefabrication of viaducts, and assemble the prefabricated bridge piles and bridge body into building blocks. The laying of the viaduct can be completed faster.This standardized and spliced ​​design allowed the high-speed rail to appear in the land of China quickly, and also completed the gorgeous counterattack of China's high-speed rail in the world.

Grasslands, rivers, and hills were conquered one by one, and the next difficulty was the mountains.The maglev train track project is even more unique. There are two technical difficulties that need to be innovated and tackled. One is the length of the tunnel and the other is the size of the tunnel.

The length of the tunnel depends on the terrain, and there are mountains between Kyoto and Huntian Valley. If you want to pass through the mountains, you must open a tunnel to achieve a short-distance connection. This will be the largest tunnel group in the world, with an estimated length of 160km. A single tunnel The length of the project can reach 40km, and countless geologists and engineers are working day and night to tackle key problems, blasting, anti-seepage, anti-collapse, and to keep the natural landform from being destroyed to the greatest extent.

What makes the difficulty rise geometrically is the size of the tunnel. The single-track two-way track determines that the tunnel has a larger diameter than the traditional tunnel.The track will be built in the middle of the entire tunnel, leaving enough space below for the trains to travel together, and the roadbed is needed to build the track.The upper part needs to bear the pressure of the mountain itself to ensure the operation of the upper train, which has great requirements for engineering technology.

Although there are many difficulties in the tunnel construction project, after the technological replacement, China's industrial level has made new developments. The more sophisticated manufacturing industry supports the production of various types of materials. With a large number of theoretical calculations and support, People solved one problem after another. Although the tunnel was completed a month later than expected, the construction of the tunnel was officially completed.

The laying of the entire track is still short of the last extremely critical link, the sound barrier.It is not that the limit speed of the maglev train is 1000km/h, but that the designer has limited the value below the speed of sound. This is a generation of maglev train designed for the accumulation of supersonic maglev technology.When an object is running at high speed and close to the speed of sound, a sound barrier will occur. The propagation speed of sound is 340m/s, which is 1224km/h when converted into kilometers per hour, which is Mach 1.

The speed of the maglev train has exceeded Mach 0.7, and the appearance of the sound barrier is inevitable, so the problem to be solved by the track is to offset the impact of the sound barrier, so that the surrounding and the body will not be affected.The vibration caused by the sound barrier has great destructive power to the whole project, especially in the tunnel, where the vibration generated by high-speed operation brings a very high challenge to the entire tunnel structure.

Supersonic airliners are banned in various countries. This is due to the impact of the sound barrier, and the high concentration of sound brings annoying sonic booms.The superconducting maglev train has made a breakthrough in speed and is even quieter than traditional trains, but the resonance of air and sound caused by the speed itself is a problem that needs to be solved.

The simplest way is to use vacuum pipeline transportation. Without the resistance of the air, there will be no speed to cause the vibration of the air to produce a sonic boom. The speed of the train can even be increased to the extreme, but the actual application value is not high. There are fewer stations, such channels are more suitable for international traffic rather than domestic traffic, and the high operation and maintenance costs of vacuum pipelines restrict the possibility of this technology.

Another design is to modify the train itself and the track environment so as to reduce the occurrence of sonic booms and prevent the spread of the sound barrier, which is fundamentally unavoidable. The streamlined design of the train is to reduce air resistance and increase the speed of the train. At this stage While the sound barrier cannot be eradicated, the country has made considerable efforts to this end.

The speed limit, the establishment of the sound insulation belt, the sound wave absorbing device of the porous structure, and the reduction of air resistance have made various efforts and designs on multiple levels. After the construction of the sound barrier system is completed, the entire railway construction project declare the end.

The entire maglev train uses the "Kunpeng" series of chips provided by the behind-the-scenes technology company, and a new operating platform developed by the state-approved railway department in conjunction with the Huaxia Academy of Sciences as part of the new transportation system.This is also the place where information collection, operation management, and scheduling control have changed the least. The performance improvement brought by superconducting materials is more in response speed and operating speed. Simply put, it reduces stuttering, which will bring people A smoother experience.

The internal testing links have been carried out one by one after the phased construction. The traffic speed test, material loss test, and basic building test are all carried out smoothly along with the built track. As the tunnel problem is overcome, the laying of the entire track is completed. In early July, we finally entered the full testing phase.

It has been 2029 months since the "ground breaking" plan was announced on April 4, 1.It's time for the superconducting maglev train to be tested.The acceptance step is not only a comprehensive test, but also a one-month trial operation after the comprehensive test.

Don’t underestimate the trial operation stage. If the comprehensive test is the acceptance and safety inspection of the engineering project, then the trial operation stage will make up for the shortcomings of various systems and minor differences. The former pays more attention to safety, while the latter pays more attention to revenue. The state spends so much The huge price is not just as a pilot, but also needs to maintain its own operations and generate income, although it is basically unrealistic to achieve profitability.

The date of the comprehensive test was set on July 7. At the railway command center in Kyoto, a large number of engineers, geologists, scientists, and people who devoted their efforts to the maglev track gathered together, and the leaders came to the site in person.This is the first part of the "groundbreaking" plan, and everyone is sweating for this comprehensive test.

"All work is ready, the train is on track, please instruct."

"Start testing." Following the leader's order, everyone in the command room stared closely at the large monitor screen.

"The opening and closing are normal, ready to start."

"Starting normally, accelerating normally."

"There is no abnormality in the data and it is running smoothly."

"The first stage has been passed, and the second stage has been smoothly entered."

"The second stage has passed, and we are about to enter the tunnel group." Two hours have passed at this time, no one has noticed the passage of time, and the leader is staring at the monitoring screen intently. With the fixed camera in the train, he toured the motherland The magnificent scenery, at the moment of entering the tunnel, the entire camera screen went black, and the leader trembled accordingly, followed by dots of tunnel lights.

"I have entered the tunnel, all the data are normal, the speed is 788km/h, and the estimated time to pass through the entire tunnel group is 12 minutes." Accompanied by the stars, the people in the command center are still not relieved, and the entry and exit of each section of the tunnel affects everyone's heart , This is an extremely long twelve minutes.

"The tunnel has passed and the data is normal."

"The terminal has been reached, and the first full test is over."

Cheers rang out, the burst of joy after depression, just like the successful launch of a rocket, the leaders were even more excited, which means that the maglev train will bloom all over the country in the near future.The leader who left in a hurry couldn't hide the smile on his face, and prepared more plans.

"Inform all departments to conduct road inspections, conduct a second test in three days, prepare for trial operation related work, and strive to open to traffic next month. Our task is about to be completed." The bosses in charge of the maglev train project know that it is not time to be happy yet , but their irrepressible smiles and trembling voices revealed their inner excitement and joy.

　TM’s toothache is killing me. I added content today, but I didn’t recommend it. It’s going to be on the shelves next week. I’ll add more, and everyone can watch more. After that, it’s time to eat.

　　


(End of this chapter)