Frozen earth foundation for power transmission tower

Abstract

The invention relates to a frozen earth foundation for a power transmission tower. The power transmission tower comprises a vertically-arranged tower body, a tower head transversely arranged at the upper end of the tower body and a power transmission line arranged on the tower head. The frozen earth foundation comprises a triangular frame formed by connecting angle iron principal materials, an angle iron diagonal member and horizontally-arranged evaporation pipes in a cross manner. The power transmission line is provided with an anti-galloping device. The frozen earth foundation is arranged below the frozen earth ground surface, tower leg connecting bases connected with tower legs are arranged at the upper end of the frozen earth foundation, and foundation fixing bases fixing the frozen earth foundation are arranged at the lower end of the frozen earth foundation. According to the frozen earth foundation for the power transmission tower, frozen earth thawing is prevented, the stability of the power transmission tower is enhanced, and production and maintenance cost is reduced.

Description

technical field [0001] The invention relates to low temperature technology processing equipment, in particular to a permafrost foundation for power transmission towers. Background technique [0002] Frozen soil is a kind of soil rock whose temperature is lower than 0℃ and contains ice. According to the length of frozen soil retention time, it is mainly divided into seasonal frozen soil (half to several months) and permafrost (more than one year). my country's Qinghai-Tibet Plateau is the region with the widest distribution of high-altitude and low-latitude permafrost in the world. Not only because of the existence of ice, its properties will undergo complex and fundamental changes compared to thawed soil. Once permafrost is disturbed and thawed for a long time, its bearing capacity will be greatly reduced, which will bring hidden dangers to engineering safety. To prevent the permafrost from thawing, a permafrost foundation for transmission towers is required. [0003] Exis...

AI Technical Summary

Problems solved by technology

[0003] Existing permafrost foundations often use conical column foundations, excavated piles or cast-in-situ piles, which will involve the following problems: ①The pile diameter is large, and the pile foundation is relatively shallow. In summer, the heat from the upper end of the pile foundation and the surrounding surface will be quickly and massively transferred to the frozen soil below through the tower foundation, which will have an important impact on the stability of the frozen soil foundation of the tower foundation

② The structure of the foundation project is complex, and it is difficult to completely compact and restore the original soil layer structure during the construction process

③Complicated structure, high production and maintenance costs

④ The existing prefabricated foundation uses angle steel as the support material, which only has a single supporting force function and cannot protect the permafrost structure

⑤The existing prefabricated foundation only has a single supporting force function, and the stability is poor

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