TITLE:
Application of In-Situ Live-Line Pole Replacement Technology in Iron Tower Construction
AUTHORS:
Kongliang Chen, Tao Zhang, Guoqing Yuan
KEYWORDS:
Tower, Tower Line Shape, Numerical Analysis, Monitoring
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.16 No.1,
March
13,
2026
ABSTRACT: The transmission tower serves as a critical component of the national power transmission system, and together with overhead transmission lines, constitutes a nationwide power grid. However, as an indispensable part of transmission line infrastructure, it is highly susceptible to extreme structural failures such as overturning and collapse induced by external loads or material corrosion, which severely undermine the operational stability and safety of transmission lines. This paper proposes an innovative construction technique for replacing structural members of high-voltage transmission towers. The proposed method ensures the stability of the local member system during the replacement process and guides the construction under the coupled interaction of the tower-line system. A form-finding analysis of the ground wire is performed, deriving a mathematical model that characterizes the profile of transmission lines under combined self-weight and wind load conditions. By applying the equal-strength replacement principle and numerical simulation methods, the feasibility and practicality of in-situ live-line member replacement are verified. This method enables construction and maintenance work by replacing partial structural members without the need for complete tower dismantlement. Monitoring results indicate that the deformation deviations of the tower in all directions are maintained within the allowable safety range. Compared with conventional methods, this technique facilitates rapid in-situ live-line repair, offering remarkable advantages in terms of construction duration and economic efficiency.