Anti-freezing structure for iron tower and foundation of transmission line in deep-water area of severe cold region

Abstract

The invention discloses an anti-freezing structure for an iron tower and a foundation of a transmission line in a deep-water area of a severe cold region. The bottom periphery of an iron tower and a foundation are back-filled with a gravelly soil layer, the compactness of the gravelly soil layer is larger than or equal to 0.90, the back-filling compacting height is not less than 0.5 m above a frost line, the filling slope ratio of the gravelly soil layer is 1:(2.5-3.0), a sand bed is laid on the gravelly soil layer, and a concrete slab is arranged on the sand bed. The anti-freezing structure is safe and effective in freezing prevention of the iron tower and the foundation, simple and practical in structure, simple and convenient to construct and low in construction cost, and effectively prevents the iron tower and the foundation from damages caused by freezing.

Description

technical field [0001] The invention relates to an anti-freezing structure, in particular to an anti-freezing structure for preventing iron towers and their foundations in deep water areas in severely cold areas. Background technique [0002] The high-voltage transmission lines on a large area of ​​water in severe cold regions freeze over a large area and for a long time in winter, and the part of the tower below the water surface is in a frozen state for a long time. Because the ice thickness of the water surface in severe cold areas is relatively large, generally exceeding 1.0m, it will generate huge ice pressure on the tower and foundation, causing serious deformation and fracture of the main and auxiliary materials of the tower, seriously affecting the safety of line operation. [0003] The traditional method of protection generally adopts strong protection, deicing and other methods. The strong protection method requires a large investment and a long construction perio...

AI Technical Summary

Problems solved by technology

The strong protection method requires a large investment and a long construction period, and the strong protection structure has high requirements on the foundation, and the scope of application is small. Engineering practice shows that the strong protection method is not effective, and sometimes the huge ice pressure even squeezes the strong protection structure and the iron tower together. The deicing method requires a lot of manpower to break and deice the ice. Although it can temporarily solve the threat of freezing the tower material, it requires a lot of manpower for daily maintenance.

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