Build a railway to Lhasa!

200 1 10 18, the wind volcano under the blue sky and white clouds, wrapped in silver, is particularly enchanting. Colorful flags were flying on the construction site, and hundreds of young commandos in orange uniforms and dozens of large construction machinery were waiting.

With an order, bursts of blasting sound resounded through the snowy plateau, and the excavation of the Fenghuo tunnel was completed. A long "Iron Dragon" starts from Golmud, an industrial new city deep in the Qaidam Basin, crosses the towering Kunlun Mountain, will pass through here, cross the Qinghai-Tibet Plateau, the "roof of the world", and reach the snowy holy city Lhasa. This is the Qinghai-Tibet Railway, the landmark project of the western development, and this is the Qinghai-Tibet Railway that benefits the broad masses of the people.

Wind-volcano tunnel has to pass through permafrost regions, and there are all kinds of complicated frozen soil layers in front, so the construction is extremely difficult. Blasting again and again, what is blown out is not stone, but hard ice slag. No wonder some western media predicted that it is impossible for China people to dig tunnels under such bad geological conditions!

Building a railway to Lhasa is really not a simple matter. What is being built is a plateau frozen soil railway with the highest altitude and the longest route in the world. The key to the construction of Fenghuoshan tunnel is temperature control. The technicians directed the commandos to spray concrete on the wall of the tunnel that had just been dug. Because the temperature is too low, concrete can't set. They brought a heater to heat the tunnel, and the ice rock on the tunnel wall melted when heated, causing the tunnel wall to collapse and slide. Wind volcano, this 10,000-year-old iceberg has revealed its ferocious face, giving the road-building army a duel!

However, all this is not difficult for our road-building army. Scientific and technical personnel observed day and night in the tunnel and found the temperature change law of ice rock. After repeated observation, analysis and experiments, they finally found the best temperature for shotcrete and subdued the frozen soil that had been raging for a while.

Build a railway to Lhasa! The morale of the road-building army is high, and the tunnel is extending bit by bit.

Bad weather and extreme lack of oxygen in turn attacked the team. There are often strong winds around the wind volcano. The newly-built 150 square meter thermal insulation greenhouse was torn to pieces by the strong wind overnight. In the newly-built generator room, the iron tile on the roof is missing. The sky was clear in Wan Li just now. All of a sudden, dark clouds were all over the place, and large and small hailstones swept down. The wind volcano is 4905 meters above sea level, and the oxygen content in the air here is less than half that of the plain. The deeper the tunnel is dug, the thinner the air in the tunnel is. Although they are ready for lack of oxygen, the situation in the construction still makes them unexpected. The oxygen provided by the oxygen cylinders on the workers' backs is only a drop in the bucket. All commandos have chest tightness, shortness of breath, headache and leg pain. The wind gun used by two people can only be answered by four people now. Labor efficiency drops rapidly. The life of the road-building army is facing a serious threat.

The lights at headquarters are on all night. Can you build a large oxygen station? Headquarters and University of Science and Technology Beijing formed a joint research group to overcome this new problem. Scientific and technological personnel forget to eat and sleep, experiment day and night and tackle key problems. After more than 200 failures, the world's first large plateau oxygen station was built! Sufficient oxygen is continuously fed into the tunnel along the long pipeline. Wind volcano, this huge stumbling block lowered its proud head again and again!

Build a railway to Lhasa! Build a railway to Lhasa! Commandos and technicians shouted the same wish over and over again. On June, 2002, 65438+1October, 65438+1October, 09, 1338-meter-long Huo Feng Tunnel was finally successfully completed!

The "iron dragon" of the Qinghai-Tibet Railway is constantly moving forward, and Lhasa is in sight. ...