1915恰纳卡莱大桥主缆索股制造关键技术研究

Research on main cable strand crucial fabrication technology of 1915 Canakkale bridge

依托世界第一主跨2023 m悬索桥对超长大规格主缆索股的关键制造技术进行了研究。以控制股内钢丝受力均匀为目标,减小由应力引起的股内钢丝长度差,提高索股制作精度。通过一系列静载、锚固性能试验,优化了超长大规格主缆索股的制作技术和锚固工艺。针对120 t级的超重主缆索股,开发成套吊装运输工装,解决多次海陆转驳带来的运输问题。采用特殊包装材料和水平成圈收放索技术及预成型索股入鞍技术,既为索股提供了有效的防腐措施,又克服了海上作业难题,提高了架设效率。

Based on the world’s first suspension bridge with the longest main span of 2023 m,research for crucial fabrication technology of super long and large specification main cable strand has been proceeded.In order to control uniform stress of steel wire in strand,reduce length difference of steel wire in strand caused by stress,and improve fabrication accuracy of cable strand.Through series of static load and anchoring performance tests,fabrication technology and anchoring process of super long and large main cable strand are optimized.For 120 t overweight main cable strand,complete set of hoisting and transportation tooling was developed to solve transportation problems caused by multiple sea and land transfer.The use of special packaging materials,horizontal loop cable retraction and release technology and preformed cable into saddle technology not only provide effective anti-corrosion measures for cable strand,but also overcome difficulties of offshore operation and improve erection efficiency.