角钢塔曲臂K节点变形原因分析及对策研究

Cause Analysis and Countermeasure Research on K joint Deformation of Angle steel Tower

摘要:

酒杯塔和猫头塔在单回交流输电线路中广泛应用，曲臂K节点属于刚度相对薄弱点，文中以某500 kV交流输电线路工程猫头塔曲臂K节点变形统计情况为例，从设计、加工、施工三方面对曲臂K节点变形原因进行了深入分析，提出了合适的结构措施和施工要求，经过某新建工程验证，控制措施效果显著，值得在今后的铁塔设计、施工中借鉴采用。

Abstract:

Cup tower and cathead tower are widely used in single circuit AC transmission lines, but the K-joint of crank arm is a relatively weak point in stiffness. Taking the deformation statistics of the K-joint of crank arm in cathead tower in a 500 kV AC transmission line project for example, the deformation causes of the K-joint of crank arm are analyzed from three aspects of design, processing and construction, and the appropriate structural measures and construction requirements are put forward. Through the verification of a new project, the effect of the control measures is remarkable, which is worthy of reference in the future tower design and construction.