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The Que'er Mountain is the lifeline for Tibet's entry into Tibet, the only way to get there on State Highway 317. The Que'ershan Tunnel Project is located between Ganzi and Degegangto and is a key project that climbs over the Que'er Mountain. This is the first super-long road tunnel in the world with an altitude of 4,300 meters above sea level. The project includes two major sections of the tunnel and the approach road. The tunnel is 7 kilometers long and is a two-way two-lane road. The total investment is 1.15 billion yuan, which can meet the daily traffic demand of 5,000 vehicles.
For a long time, Que'ershan was the “bottleneck†of this lifeline. It took more than one hour to cross the Que'er Mountain at normal speed. In the winter, after the road is frozen, the time to climb the mountain will be nearly 3 hours. Once the traffic control is implemented, this lifeline will be completely interrupted. On November 10, this status changed. After more than 10 years of scientific research and five years of arduous construction, the Queer Mountain Tunnel with a total length of 7,079 meters was formally completed. If the construction is successful, it can be opened to traffic by the end of 2017, and the long-term traffic bottleneck will be completely eliminated. Poverty-stricken counties opened up major arteries.
The significance of the Queer Mountain Tunnel is self-evident. However, if the altitude is high, and the average annual temperature is minus 18 degrees Celsius, for the smooth construction, the first thing that needs to be addressed is oxygen supply. Because once the oxygen is thin, not to mention people do not work hard, even the machines may not "turn." “Oxygen content in the tunnel is estimated to be about half that of the Chengdu Plain.†The relevant person in charge of the Southwest Institute of Science and Technology, which participated in tunnel research, said that as early as 2004, the Southwest Institute began to “under high-altitude low-temperature, low-pressure and low-oxygen conditions. Study on Major Projects for Construction Technology Study of Extra Long Tunnels .
Hypoxia problem, one solution? For this reason, the construction unit has built an oxygen station exclusively outside the cave. Through a huge pipeline, oxygen can be continuously transferred into the tunnel. However, the actual operation is far from simple. In August this year, members of the research team went to Que'ershan again to investigate and explore. At that time, the situation was such that Zhang Bo, a technician from the Southwestern Institute of Technology, had a deep memory. He said that the Queershan road circling and twisting, driving the car to play 12 points, although the scenery outside the window is beautiful, but with the gradual elevation of elevation, the joy of enjoying the beautiful scenery gradually be breathing difficulties, chest tightness and other discomfort Alternative. “We just have this feeling in the mountains and the tunnel is even worse.†Zhang Bo said that although the oxygen problem in the tunnel has been solved, the new employees still need to adapt to the plateau construction and go to the entrance every few hours. Absorb oxygen outside the clinic. In fact, in order to speed up the construction, some workers directly carry the oxygen bottle into the tunnel to work. “Go in for a while and then come out and take a breath of oxygen. The kind of difficult scene that people have not experienced is hard to imagine.â€
Because of high altitude and in the tunnel, low oxygen concentration can cause chest tightness and difficulty in breathing. Since an oxygen station is built and oxygen is delivered to the tunnel, oxygen concentration may be too high, which can cause oxygen poisoning. Therefore, Real-time monitoring of oxygen concentration. Shenzhen Industrial Mining Network Co., Ltd. provides electrochemical oxygen sensor O2-M2, can effectively solve this problem, the product features:
The range of this product is 0~25%
Linear output
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Service life is 2 years
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