高压输电塔优化设计及真型试验验证

Optimization design of the high-voltage transmission tower and full-scale test verification

高压输电线路是重要的生命线工程,在确保安全的前提下提高其经济性具有重要意义。将输电塔的优化过程分为整体外形优化和局部节间优化两种,前者包括塔头型式优化、横担型式优化和根开优化,后者包括横担节间优化、塔身节间优化、塔腿节间优化。以国网通用设计杆塔2E11-SZC2为例进行优化设计,并对优化后的杆塔开展了真型试验。结果表明:优化后输电塔重量减轻3.9 t、减重24.5%,优化效果明显;整体外形优化比局部节间优化效果明显。优化塔通过了各工况100%设计荷载测试,在超载工况下加载至110%设计荷载后丧失承载能力,验证了优化后输电塔的可靠性。

As high-voltage transmission lines are important lifeline projects,it is important to improve its economy while ensuring safety.The optimization process of the transmission tower is divided into general-shape optimization and local-section optimization.The former includes tower head optimization,cross arm optimization and root span optimization,the latter includes cross arm internode optimization,tower body internode optimization and tower leg internode optimization.A common design tower named 2E11-SZC2 is optimized by the proposed method,and full-scale test is conducted to verify its effectiveness.The optimization result shows that the weight of optimized tower reduces by 3.9 t and 24.5%compared with the original design.The effect of general-shape optimization is more obvious than that of local-section optimization.The optimized tower passes 100%design load test in each working condition,and loses bearing capacity after loading to 110%designed load under overloading condition,which verifies the reliability of the optimized transmission tower.