In fact, these iron bars are too effective. At first, no one expected that their existence was like the patron saint of railways. At the beginning of the construction of Qinghai-Tibet Railway, it faced three worldwide problems: cold, hypoxia and frozen soil. Frozen soil is one of the most difficult problems to solve. In winter, due to the temperature drop, the water freezes, which leads to the ground arching. In summer, the ice turns into water and flows around, which will deform the railway subgrade built on frozen soil and lead to disaster. This technical problem has puzzled scientists and railway builders in China for decades. Now the iron bar you see is an effective solution after many studies and experiments.
This iron bar is actually a patented technology product developed by researchers. It is called a low-temperature hot rod with a temperature measuring tube in the center. As a heat conduction system, it makes full use of the principle of heat conduction, and can bring cold air from the frozen soil layer under the railway track to the surface soil layer in winter to ensure that the soil layer can remain frozen but not soft. In summer, it can transfer the heat contained in the frozen soil to the air. Just like air conditioning, the subgrade can be kept frozen forever through cold and hot exchange. You can say that.
In addition, the hot rod technology has the following advantages: it is not limited by subgrade structure, is not disturbed by noise, has long service life, does not need daily maintenance, realizes real environmental protection, is convenient to install, avoids digging the surface, does not destroy the original ecological landform of no man's land in Hoh Xil, and has low burial cost. Compared with the scheme of replacing roads with bridges, the investment can be saved by more than 654.38+0 billion yuan, and the related technologies are related to Chinese Academy of Sciences.
Using hot rod technology to control frozen soil only reflects a small part of the achievements of the majority of scientific researchers. It is precisely because of these achievements that the Qinghai-Tibet Railway can finally be successfully completed, filling the railway gap in Tibet's comprehensive transportation system, fundamentally improving the transportation conditions in and out of the local area, effectively reducing the transportation costs of materials in and out, providing more convenience for all aspects of Tibet's development, and realizing the docking of the national tourism market, laying the foundation for Tibet to become a world-class tourist destination.
Many seemingly insignificant details in life reflect the wisdom of working people and researchers. This wisdom often comes not from accidental inspiration, but from repeated scrutiny and argumentation, assuming that the optimal solution is obtained through practice. Their hard work has created a comfortable and convenient living environment for everyone, but most of their names are unknown. Therefore, we should always be grateful, respect the workers' efforts, never forget the well diggers and live up to the contributions made by these unsung heroes.