自锚式悬索桥空间索夹施工技术

Construction Technology of Spatial Clamp of Cable Self-anchored Suspension Bridge

南京长江隧道工程江心洲右汊大桥通过索夹放样,索夹安装顶线标记,成功解决了主缆从空缆到成桥横向位移产生的扭转,确保主缆高强钢丝在成桥状态下的结构受力安全。采用自制螺栓拉拔器对索夹螺栓进行预紧,更加精确地控制了索夹螺栓的预紧力,确保索夹对主缆的握紧效果。

By clamp lofting and clamp setting top line marking, Right Branch Main Bridge in Jiangxin Island of Nanjing Yangtze River Tunnel Project successfully solved the torsion problem of the main cable caused by cross displacement from the cable-finished stage to the dead-load state, which ensures the structure safety of main cable＇ s high-strength wire at the dead-load state. We use homemade bolt puller to preload the clamp bolt, which more accurately controls the preload of the clamp bolt, and ensures the clamp＇ s holding effect on the main cable.