Method for assembling tower by post-assembly rocker arm holding pole technology

Abstract

The invention relates to a method for assembling a tower by post-assembly rocker arm holding pole technology. The method comprises the following steps that: firstly, a main holding pole serving as aninner suspended outer-guy holding pole slice hoists each segment of a tower body; a rocker-arm seat section is arranged above the main holding pole in advance; and after the tower body is hoisted, twosubsidiary rocker arms with preset lengths are symmetrically arranged on the tower body, and are arranged only in an assembly mode without adjusting so as to hoist a top frame and a cross arm of an iron tower. The length and rising argument of the rocker arm are determined according to the center of gravity of a hoisted piece, which means that the length and rising argument of the rocker arm aredetermined according to in-position radius of ground supports and the cross arm; after the two rocker arms are symmetrically arranged, and when a left arm hoists the ground support and the cross arm,the left arm is anchored to a ground anchor by utilizing a right arm hoisting slip rope for balance measure; and after the left ground support and the cross arm are hoisted, the hoisting slip rope isnot removed and served as a balanced anchoring point for hoisting a right side support and the cross arm, and then the hoisting is completed in turn. The method can be widely applied to the hoisting of an extra-high voltage 1000 kV alternating current dual loop and a +/-800 kV direct-current power transmission iron tower which have heave unit weight, large in-position radius and large installationdifficulty and have complex structures, such as long cross arms, ground supports and the like.

Description

Technical field: [0001] The invention relates to a construction method of a power transmission iron tower, in particular to a hoisting method for a large-scale iron tower of a ±800kV DC UHV line constructed for the first time in my country. Background technique: [0002] The construction of transmission towers has the characteristics of small unit quantity, large mobility, and environmental constraints. Therefore, the construction plan and the selected equipment should first consider simplicity, portability, and easy transfer. With the development of UHV 1000kV AC and ±800kV DC transmission lines, the single-piece quantity of engineering iron towers has also increased (4 to 5 times that of conventional towers, especially when the single length of the cross arm is 20 meters and the single weight is more than 8t). , but the characteristics of large mobility and environmental constraints still exist, and conventional construction methods and tools can no longer meet the constru...

AI Technical Summary

Problems solved by technology

With the development of UHV 1000kV AC and ±800kV DC transmission lines, the unit weight of engineering iron towers has also increased (4 to 5 times that of conventional towers, especially the single length of the cross arm i

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