Reinforcing method for improving net section strength of externally-attached plate type old line iron tower

Abstract

The invention discloses a reinforcing method for improving net section strength of an externally-attached plate type old line iron tower, which comprises the following steps of: determining a part with weak net section area bearing capacity of a main material of the old line iron tower, and then rechecking the bearing capacity of the main material of the old line iron tower under an annual flat working condition; and finally, additionally arranging an externally-attached steel plate at the position where the net sectional area bearing capacity of the old line iron tower main material is weak, and enhancing connection between the externally-attached steel plate and the old line iron tower main material through an auxiliary component. According to the method, the ultimate bearing capacity of the iron tower is improved, the investment cost is saved, the power failure time is shortened, the construction operation difficulty and workload are small, and the feasibility is high.

Description

technical field [0001] This patent relates to a reinforcement method for increasing the net section strength of an old line iron tower with an externally attached plate, which belongs to the field of overhead transmission line engineering. Background technique [0002] The transmission line tower is mostly a structure composed of galvanized angle steel and bolts. After the tower is assembled, its ultimate bearing capacity has been determined. However, with the improvement of design standards and changes in use requirements, the bearing capacity of old towers It is difficult to meet the requirements of the current specifications and new service conditions. At the same time, with the increase of the service life, the angle steel components will gradually corrode, and the bearing capacity of the components will also decrease. Therefore, it is necessary to renovate the iron tower. The conventional transformation of the old line iron tower mainly has The following two methods: on...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a reinforcement method for increasing the net cross-sectional strength of an old line iron tower with an externally attached plate, on the basis of not replacing the original tower foundation, to improve the bearing capacity of the iron tower components, and to eliminate the bearing capacity caused by corrosion. The impact of capacity weakening is to solve the problem that the bearing capacity of old iron towers is difficult to meet the requirements of current specifications and new service conditions, and the bearing capacity of angle steel components of old line iron towers is reduced due to angle steel corrosion

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