[National Builder] Beijing-Zhangjiakou Railway, come on! Youth shines on the construction site.

　　CCTV News:Jing-Zhang Railway is the first railway in China, which was built under the auspices of Zhan Tianyou. This century-old railway once carried the glory and dream of China’s modernization. Today, the Beijing-Zhangjiakou high-speed railway from Beijing is under construction. It is an important supporting project for the 2022 Beijing Winter Olympics, and it is also the world’s first high-speed railway with a design speed of 350 kilometers per hour. The rail laying of Guanting Reservoir Bridge of Beijing-Zhangjiakou High-speed Railway will be completed in one month. Construction here is a group of young people with an average age of less than 30. Let’s take a look at the different youth stories on the construction site.

　　At the construction site of Guanting Reservoir Bridge of Beijing-Zhangjia high-speed railway, after a heavy rain, the bright moon was in the sky and the bridge was even colder. However, once the concrete was poured, the scene immediately became hot.

　　Wang Hailong is a technician at the construction site. He is 23 years old. On the Guanting Reservoir Bridge of Beijing-Zhangjiakou High-speed Railway, workers are pouring concrete on the track bed. Suddenly, the straw that was pouring concrete stopped discharging.

　　The mechanical arm of the pump truck is more than 50 meters long, and there is some residual concrete in the pipe. If it is not cleaned in time, concrete will condense in the straw, which will block the pipeline and damage the equipment. In order not to delay the construction, Wang Hailong urgently transferred a waterwheel to clean the residual concrete in the pipeline.

　　For more than two hours in a row, Wang Hailong made more than a dozen phone calls and successively transferred three engineering vehicles. Keep an eye on the faulty pump truck, clean it up and leave the scene.

　　Although there was an emergency, Wang Hailong was busy but not chaotic. His sophistication makes it hard to believe that this is a "rookie" who just graduated from college and has been working on the construction site for only two months. Near one o’clock in the morning, the pump truck urgently transferred from other construction sites was also in place. Wang Hailong this just felt a burst of unstoppable tiredness. Wang Hailong, who is unabashedly tired, is like a real post-90s generation.

　　journalist: "This situation just now, if you don’t handle it in time, will bring a lot of trouble?"

　　Hailong Wang: "Yes, like this problem, if the waterwheel is not poured in time, the problem that the pump truck just now will block the pipe will be very serious, and this pipe will be scrapped."

　　Adding a military coat, Wang Hailong hurried back to the construction site. Fortunately, everything has returned to normal, Wang Hailong was relieved. Due to equipment damage, the construction was delayed, and the concrete pouring didn’t end until seven o’clock the next morning.

　　Guanting Reservoir Bridge of Beijing-Zhangjiakou High-speed Railway is located in Huailai County, the "Fengkou District" where Zhangjiakou enters Beijing, with a total length of about 9 kilometers. The main bridge of the completed bridge has 8 arches, and the 19-meter-high arched steel truss girder spans the Guanting Reservoir and becomes a beautiful landscape.

　　In another month, the high-speed rail will start laying, and before laying, it is necessary to simulate and install a tool rail first, and use it to adjust the direction and height of the rail.

　　Guanting Reservoir Bridge is the first ballastless track bridge running at 350 kilometers per hour in China, which is also the advanced track technology in the world today. It can avoid splashing ballast, with good stability and long service life. The distance between the two rails is 143.5cm, and the construction error cannot exceed 2mm.

　　I was criticized by the teacher because Wang Hailong and his new colleagues were inexperienced. After the high-speed railway is opened to traffic, in order to avoid interference with railway signals, the steel bars of the ballast board should be insulated. There was a section of steel bar that was not insulated properly, and Wang Hailong did not detect it.

　　In order to accumulate more experience, Wang Hailong has become the person who asks the most questions among the new employees. Sometimes, his questions are so many that they are even annoying.

　　Huailai County is located in the tuyere area where Zhangjiakou enters Beijing, and more than half of the construction site of Guanting Reservoir Bridge is windy with a magnitude of five or six. Every day in the construction site, only two months after going to work, Wang Hailong has changed from a scholar with a full face of collagen when he graduated to a "little black" in everyone’s eyes.

　　The people who participated in the construction of Guanting Reservoir Bridge with Wang Hailong, with an average age of less than 30, are a very young team.

　　From 7 pm to midnight, there is no light interference, and the temperature is relatively constant, which is the fine adjustment time of the track. After fine tuning, the high-speed rail will go more smoothly in the later operation process.

　　Whenever night falls, Li Lei and his friends set off.

　　Measurement is the eye of engineering. In order to ensure that there is no error, the fine adjustment needs to be measured three times each time. 80% of the section of Guanting Reservoir Bridge is a curved track, and the height of the outer track is 160mm higher than that of the inner track. When the track is finely adjusted, the allowable range of the track difference between the two sides is 2mm. However, Li Lei requires that the accuracy error must be controlled within 0.5 mm..

　　Surveyor Li Lei: "why should I control it at 0.5 mm? Because it will be more convenient to fine tune the long track after we finish tuning. In the future, if you are address unknown, people will be more comfortable sitting on it. "

　　By November this year, the track laying of Guanting Reservoir Bridge of Beijing-Zhangjia high-speed railway will begin, and at that time, Wang Hailong and his colleagues will also move to other construction sites. The 174-kilometer Beijing-Zhangjia high-speed railway will be completed and opened to traffic by the end of 2019. The Beijing-Zhangjia high-speed railway is a major national project, but its quality depends on the builders on the spot to check every small detail.

　　Technician Sun Zixiao: "Everyone has done his job in a down-to-earth manner, which adds up to a very remarkable achievement."

　　Hailong WangAfter the completion of this bridge, during the Winter Olympics, friends from all over the world will take this high-speed train to and from Zhangjiakou and Beijing, and many people will shuttle through this bridge. I want to say a word: Jing Zhang, come on! I came to see you with the world. "