Construction method for erecting electric transmission line double-leg angle steel tower by helicopter unit

Abstract

The invention discloses a construction method for erecting an electric transmission line double-leg angle steel tower by a helicopter unit, and relates to the field of electric transmission line irontower construction. When a helicopter unit is used for erecting the double-leg angle steel tower, due to the fact that between-section cross-shaped connecting plates are installed on tower sections, difference exists between the root distance sizes of the lifting tower sections and the in-position tower sections, and being in-position is difficult. The construction method comprises the following steps that (1) the between-section cross-shaped connecting plates and main material cross-shaped connecting plates are installed on the lifting tower sections; (2) inner angle wrapping steel and outerangle wrapping steel of the in-position tower sections are connected with and fixed to inner main materials and outer main materials correspondingly, and then abutting auxiliary sleeve pieces are installed on the inner angle wrapping steel and the inner main materials correspondingly; (3) a helicopter hovers and operates to guide the tower sections to be in position through the abutting auxiliarysleeve pieces of the tower sections; after the tower sections are in position, high-altitude personnel installs a small quantity of bolts on two sides of abutting points of the tower sections, and thehelicopter unhooks and leaves; and (5) remaining bolts are installed in a supplementary mode, and the abutting auxiliary sleeve pieces are detached. According to the construction method for erectingthe electric transmission line double-leg angle steel tower by the helicopter unit, the problem of difficult position taking caused by significant difference of the root distance sizes of the liftingtower sections and the in-position tower sections is solved.

Description

technical field [0001] The invention relates to the construction field of transmission line iron towers, in particular to a construction method for erecting transmission line double-leg angle steel towers by helicopters. Background technique [0002] At present, the application of helicopters to erect towers of overhead transmission lines has become an important mechanized means for the construction of large-scale overhead transmission lines and rapid post-disaster reconstruction. It is necessary to promote the deepening application of helicopters in the construction of overhead transmission lines. In recent years, the State Grid Corporation of China has carried out the exploration and experiment work of helicopter construction in the demonstration project of overhead transmission lines, and has achieved phased results. It has the technical and material basis to promote the deepening application of helicopters. [0003] Helicopter erection of overhead transmission line doubl...

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Problems solved by technology

[0003] Helicopter erection of overhead transmission line double-leg angle steel towers usually adopts the construction method of hoisting the tower section as a whole. However, due to the cross-joint plates between the tower sections, there is a significant difference in the root opening size of the hoisting tower section and the tower section in place, resulting in Difficult to even get in place

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