基于钢管混凝土原理的500kV构架柱加固设计

Reinforcement Design of the 500kV Truss Column Based on the Principle of Concrete Filled Steel Tube

双河500 kV变电站需要进行增容改造、更换500 kV构架导线,根据现行导线荷载和规范要求对500 kV构架进行复核计算。针对构架柱受力不满足规范要求这一情况,根据钢管混凝土原理采用构架柱内灌混凝土的加固设计方案和高位抛落不振捣法的施工方案。通过复核计算,构架柱内灌混凝土的加固设计方案能够提高构架柱的受力性能,既可满足工程要求,又节省了停电时间。

The Shuanghe 500 kV substation plans to carry out the reconstruction to increase the power capacity.The 500 kV truss is rechecked and calculated according to the current conductor load and specification requirements.Aiming at the situation that the force of the truss column does not meet the requirements of the specification,basing on the principle of concrete-filled steel tube,the filling concrete reinforcement method and construction scheme of high-position drop without vibrating method are proposed.Through rechecking calculations,the filling concrete reinforcement method will significantly improve the mechanical performance of the truss column,which not only meets engineering requirements,but also shorts power outage time.