Hoisting method of transmission line guyed tower shaped like Chinese character 'gan'

Abstract

The invention relates to the field of iron tower hoisting, in particular to a hoisting method of a transmission line guyed tower shaped like a Chinese character 'gan'. The hoisting method includes thefollowing steps of S1, ground assembling; S2, hoisting of a tower body and an upper cross arm; S3, unhooking; S4, mounting of a stay wire; S5, hoisting of a lower cross arm; S6, adjusting of the mounting precision of the tower body. According to the structural characteristics of the guyed tower shaped like the Chinese character 'gan', the four parts are assembled respectively on the ground firstly before being hoisted, a split type assembling and erecting method is adopted, the tonnage requirement of a hoisting machine is lowered, damage to plants is reduced, the influences on an ecological system are greatly reduced, and meanwhile the construction cost is also reduced. Ground tower assembling cooperates with tire type hoisting machine tower erecting, most work of iron tower assembling iscompleted on the ground, tower material defects can be found and overcome in the ground assembling process, and construction quality control is superior to that of derrick tower assembling and erecting.

Description

technical field [0001] The invention relates to the field of iron tower hoisting, in particular to a method for hoisting a dry-shaped guyed tower of a power transmission line. Background technique [0002] Dry type guyed tower is a commonly used tower type for dual-circuit high-voltage transmission lines on the same tower. technology and installation process have very high requirements (refer to the attached figure 1 ). [0003] At present, the erection construction of dry-shaped cable towers is mainly to use pole-holding towers in sections, that is, after each group erects a section of iron tower, use temporary stay wires to fix the tower body, and then remove the poles and move the position of the poles upwards to fix the poles again. After the pole, continue to install the iron tower upwards. After the installation is completed, the temporary guy wires are used to fix it again. The temporary guy wires on the lower section of the tower body are removed and the poles are ...

AI Technical Summary

Problems solved by technology

[0003] At present, the erection construction of dry-shaped cable towers is mainly to use pole-holding towers in sections, that is, after each group erects a section of iron tower, use temporary stay wires to fix the tower body, and then remove the poles and move the position of the poles upwards to fix the poles again. After the pole, continue to install the iron tower upwards. After the installation is completed, use the temporary stay wire to fix it again. Remove the temporary stay wire on the lower section of the tower body and move up the pole at the same time. Repeat this process until the iron tower is fully assembled. The construction process is cumbersome and the construction efficiency is low.

[0004] Part of the project also adopts the scheme of 150t tire hoist as an integral tower, that is to say, after the dry type guy wire 0 tower is fully assembled on the ground, use 150t tire hoist and 30t tire hoist to lift the whole tower upright. The 150t tire-type hoist used has relatively high requirements on the hoisting platform area, flatness, and the width of the approach road. The preparatory work is heavy and the vegetation damage area on the construction site is large, and the mechanical cost is high.

[0005] During the hoisting process of the iron tower, steel wire ropes are generally used to directly bind the tower body for the connection with the iron tower. Uneven force on the tower body may easily cause deformation of the iron tower. In addition, the steel wire rope is likely to cause damage to the galvanized layer of the iron tower.

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