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China and Nepal is considering building a 540-kilometer railway through the Himalayas. As we all know, the Qinghai-Tibet Railway is already a miracle of human engineering. Does China really want to bore through the Himalayas? As we all know, the world's longest railway tunnel, the Gotthard Tunnel, is located in the central Swiss Alps, with a total length of 57 kilometers and took 11 years to build. So how long will the Himalayas tunnel take and how much will it cost? Although everything is an assumption at this stage, previous experience is that the cost of building a railway in an area with extremely harsh geological conditions is basically 100 million yuan per kilometer.
As for the Himalayas Tunnel, at least 10 billion RMB is needed. As for the construction period, subject to external conditions, it will take about 10 years. In addition, if the tunnel is built at an altitude of more than 7,000 meters above sea level in the Himalayas, the length can be shortened, but considering that the air is thin and the temperature is too low, it is not suitable for people and vehicles to pass, so it is best to reduce the height of the tunnel to less than 5,000 meters. At the same time, a major difficulty in engineering operations in the alpine zone is lack of oxygen.
When the Qinghai-Tibet Railway was built and the altitude was raised to 4,500 meters, 140,000 people participated in the construction, and there were no cases of death due to alpine hypoxia, but more than 100 people died because of a tire burst. Under high altitude conditions, the pressure difference between the inside and outside of the car tire is too large. It seems that boring through the Himalayas and building a tunnel is not an easy task. Perhaps, the Qinghai-Tibet Railway, the railway laid on top of the snow-capped mountains, will tell us some stories. Why don't we review the construction process of the Qinghai-Tibet Railway and see how Chinese builders drilled through the Kunlun Mountains step by step? OK, let’s get started!