220 kV单回路复合杆塔关键技术研究

  目的]  输电杆塔的设计对工程造价和周边环境都有举足轻重的影响。探究220 kV单回路复合杆塔的设计方法和经济性指标，对输电线路的优化有着积极的意义。  方法]  先通过比选不同杆塔形式、复合横担截面形式和横担布置的方式，得出推荐方案。然后通过ANSYS软件对杆塔进行线性及非线性分析，了解两种分析方式的差异。再查找相关资料，对普通杆塔和复合杆塔的造价进行测算，探索其经济性。  结果]  研究表明:对比猫头塔，酒杯塔和上字型塔，复合横担应用于上字型铁塔中更为合理；圆环型截面具有惯性矩较大，承载力高，加工连接方便等优势；220 kV直线塔在满足安全性的前提下合理选择经济性更好的结构布置形式，建议选择三拉一压布置方案；通过ANSYS的模拟分析，线性分析具有足够的精度，可采取线性分析进行设计；选用复合横担时应对杆塔造价，安装费用，拆迁补偿等相关因素，在工程量上进行技术经济的比较，从而得出较为合理的方案。  结论]  研究成果具有普遍意义，可为今后复合杆塔的设计提供一定的技术支持。

Research on Key Technologies of 220 kV Single Circuit Composite Tower

  Introduction]  The design of transmission pole and tower has a significant impact on the project cost and the surrounding environment. Exploring the design method and economic index of 220 kV single circuit composite tower is of positive significance to the optimization of transmission lines.  Method]  Firstly, the recommended scheme was obtained by comparing different tower forms, composite cross-section forms and cross-section arrangement. Then the linear and non-linear analysis of tower was carried out by ANSYS software to understand the difference between the two analysis methods. Then found out the relevant information, calculated the cost of common and composite pole towers, and explored their economy.  Result]  Compared with Cathead Tower, Wine Cup Tower and Top Pyramid Tower, it is more reasonable to apply composite crossbars in Top Pyramid Tower; ring section has the advantages of larger moment of inertia, higher bearing capacity and convenient processing and connection; 220 kV straight tower can reasonably choose more economical structural layout form on the premise of satisfying safety, and it is recommended to choose three-pull-one-press layout scheme through ANSYS simulation analysis shows that the linear analysis has enough accuracy and can be designed by linear analysis. When selecting composite crossbar, the related factors such as tower cost, installation cost, relocation compensation and so on should be taken into consideration, and the technical and economic comparison on the engineering quantity should be made, so as to obtain a more reasonable scheme.  Conclusion]  The research results are of universal significance and can provide some technical support for the design of composite tower in the future.