通用型反梁式角钢塔电缆终端平台研究

Research on General-purpose Anti-beam Platform of Angle Steel Cable Terminal Tower

[目的]电缆终端塔是电网建设中架空—电缆切换的发展趋势。[方法]基于目前的电缆终端建设现状,提出一种全新的反梁式终端平台结构,主要研究平台结构的优化布置,详细分析结构体系新颖之处,校验平台主要受力构件的强度、刚度及稳定性,分析平台结构对杆塔受力的影响,讨论细节问题。[结果]研究结果表明:在一定跨度范围内采用简化支撑结构的反梁式平台结构,利用终端头及避雷器台座作为主梁,合理布置次梁大小及间距,能够保证平台结构强度及刚度,节约钢材用量,形成平台标准化设计,结合现有的、条件多样的终端塔,通过"终端塔+标准设计平台"的模式,实现"通用型"。[结论]研究成果较多地吸取了广东省范围内的经验,可满足不同地区、不同电压等级、不同塔型呼高等要求。

[Introduction]Cable terminal tower is the development trend of converting the overhead transmission line to electric cable line in power grid construction.[Method]Based on the current status of cable terminal construction,this paper proposed a new anti-beam structure of cable terminal platform,mainly studied the optimal arrangement of the platform structure and analyzes in detail of the new structure.The strength,rigidity and stability of the main force components of the calibration platform were analyzed.The influence of the platform structure on the force of the tower was analyzed,and the details were discussed.[Result]The results show that using a simplified structure of the anti-beam structure using simplified support structure in a range of span and the terminal head and the arrester base on the main beam,the size and spacing of the secondary beams can be properly arranged to ensure the strength and rigidity of the platform structure and save the amount of steel.Form a standardized platform design,and combine the existing terminal towers with diverse conditions can realize“general-purpose”through the“terminal tower+standard design platform”model.[Conclusion]Our data widely summarizes the experiences in Guangdong province,this work provides some guidance for different areas,voltage classes and tower models.