Transmission line tower is generally divided into five types according to its shape: wine cup type, cat head type, upper font type, dry type and bucket type. According to their uses, they are: tension tower, straight line tower, corner tower, transposition tower (replacing traverse phase position tower, terminal tower and crossing tower, etc...Their structural characteristics are that each type of tower is a space truss structure, and the members are mainly composed of a single equilateral angle steel or a composite angle steel. The materials generally use Q235(A3F )and Q345(16Mn). the connections between the members are made of coarse bolts and shearing connections by bolts. The whole tower consists of angle steel, connecting steel plate and bolts, and individual parts such as tower feet are welded by several steel plates As a combination, hot galvanized corrosion protection, transportation and construction is extremely convenient. For the tower which is below 60 m high, the foot nail is set on one of the main materials of the tower, so as to facilitate the construction workers to climb the tower.
Transmission line towers are mainly subjected to wind load, ice load, line tension, constant load, installation or maintenance of the personnel and tools, as well as breakage, earthquake and other loads. The reasonable combination of these loads under different meteorological conditions should be considered in the design. The constant loads include the weight of towers, wires, fittings, insulators and the angle resultant forces of the insulators, and the unbalance tension along the lines, etc. Breaking Line load is considering the number of broken Lines Different countries have different regulations on simultaneously breaking wire and lightning line, the magnitude of breaking line tension and meteorological conditions of breaking line.
Our transmission line tower is mainly divided into 500KV transmission line tower and 110KV transmission line tower, including straight line tower, tension tower, corner tower, substation structure and other
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