Frozen soil treatment

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Frozen soil treatment

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Hot rod technology protects the Qinghai-Tibet Railway

In the history of the Qinghai-Tibet Railway, the permafrost thawing on the Qinghai-Tibet Plateau in summer and the frost heaving in the cold season have led to unstable roadbeds, which has hindered the construction and operation of the Qinghai-Tibet Railway, representing a major technical problem for the construction of the Qinghai-Tibet Railway. After years of research as well as field verification in the permafrost area of the Qinghai-Tibet Plateau, our patented technology "Low Temperature Hot Rod with Central Temperature Measurement Tube" has solved the major problem of "frozen soil thawing settlement and frost heaving". This technology of ours is designated as the only technical reserve for freezing damage control on the Qinghai-Tibet Railway, making significant contributions to the full and safe operation of the Qinghai-Tibet Railway. We, as the main builder, won the "2020 National Science and Technology Progress Award" for the "Key Technology and Engineering Application of Qinghai-Tibet High-Altitude Permafrost Expressway Construction and Maintenance" project.

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Working principle:

Through the one-way cooling effect of the hot rod, a large amount of cold energy is stored in the underground frozen layer in the cold season, preventing the frozen soil from thawing in the summer, forming a "permafrost layer", keeping the upper limit of freezing stable, and It preventing thawing settlement and deformation of the roadbed during the operation of railways and highways in frozen areas.

Technical applications:

We make full use of the characteristics of hot rods such as high thermal conductivity, excellent isothermal performance, variable heat flow density, diode characteristics in thermal conductivity, and the ability to adjust the shape according to environmental needs. We have widely promoted hot rod technology and innovatively applied it in the field of frozen soil management, including highways, railways, power grids, airports, long-distance energy pipelines, military facilities, civil buildings and other infrastructure.

Hazards of frozen soil:

Multi-year permafrost soil, as well as thermal mudslides and ice picks caused by thawing and frost heaving, deformation of railways and highways

Core reference：