Study on Freezing Resistance and Bearing Capacity of Electric Tower Foundation in Frozen Soil Area

This Frozen soil refers to soil or rock containing ice, whose soil temperature is lower than its freezing temperature. Different regions and different geological conditions influence the engineering problems of frozen soil regions. The tower foundation is a very important part of the construction of the transmission line and plays a decisive role in the whole project. Frost heaving mainly refers to the fact that the water in the soil reaches below-freezing temperature and freezes into ice during the freezing process, resulting in volume increase and tangential frost heaving force, resulting in instability of the tower foundation. Thawing and sinking refer to the phenomenon that part of shallow frozen soil melts and sinks when the ambient temperature rises due to the influence of ground temperature or human factors, which may lead to the overall overturning of the tower in serious cases. These two kinds of engineering hazards will directly affect the freezing characteristics, bearing characteristics, and stability of the tower infrastructure. Therefore, given the above problems, this paper studies the freezing-out problem of tower foundations in frozen soil areas, and proposes a scheme for the elastic isolation of the pole base, to reduce the influence of freezing-out by improving the impervious performance of soil structure. This method not only meets the requirements of rapid production, transportation and installation of foundation but also ensures the safety and stability of the foundation structure. And it has the advantages of fast construction speed, high quality, and safety, and low comprehensive cost.