Method for electrified spanning construction of high-voltage power transmission and transformation line

Abstract

The invention discloses a method for electrified spanning construction of a high-voltage power transmission and transformation line. The method comprises the following steps of: (1) preparation for construction: computing the position, the height and the width of a spanning frame; (2) building of the spanning frame: according to the designed spanning frame model, installing an auxiliary lifting pole for suspending pulleys on towers at two sides of a span of a newly-built line, suspending double-layer pulleys on the lifting pole, penetrating the double-layer pulleys by Deenyma ropes to form ropeways which are regarded as carrying ropes of a safety net and suspending the safety net under the carrying ropes through suspending belts and small pulleys; (3) extension of insulation guide ropes; (4) extension of conducting wires and ground wires: extending the conducting wires, the ground wires and installation accessories above the safety net by utilizing the insulation guide ropes; and (5) dismantling of the built spanning frame after the electrified spanning construction is finished. By applying the method disclosed by the invention, the advantages of cost saving in renting the spanning frame, high construction speed, good insulation strength, high reliability, high practicability, high superiority and better social and economic benefits are achieved.

Description

technical field [0001] The present invention relates to the construction technology of power transmission and transformation power lines, in particular to a construction method for live crossing of high-voltage power transmission and transformation lines, especially suitable for crossing roads, railways, rivers, high-voltage power lines, A live crossing construction method for power transmission and transformation power lines whose voltage level can reach 500kV. Background technique [0002] With the development of power grid construction, in power transmission and transformation projects, the construction volume of live crossing is increasing, and the difficulty of crossing is also increasing. At the same time, the requirements for live crossing in national standards and regulations are also getting higher and higher. During the construction of high-voltage power transmission and transformation lines, common highways, railways, rivers, and high-voltage power lines will be c...

AI Technical Summary

Problems solved by technology

The spanning frame erected in the existing spanning construction has various forms such as moso bamboo spanning frame, column type spanning frame (four columns, four columns per phase, or two columns per phase), and the construction of high-voltage power transmission and transformation lines puts forward new safety requirements for erecting the spanning frame. Not only the insulation performance of the live spanning construction must be considered, but also the convenience of transportation and installation, labor intensity, adaptability to the spanned site, labor intensity of erecting and dismantling the spanning frame, and the adaptability of the spanning frame At present, there is no ready-made live spanning construction experience at home and abroad for reference

Images