公安长江大桥高强度螺栓施工研究

文章介绍了公安跨长江公铁两用特大桥高强度螺栓验收及工艺试验方法,通过试验数据分析了温度变化对高强度螺栓扭矩系数的影响,并阐述了本桥高强度螺栓施拧过程中的控制要点,对同类工程的施工具有启发作用。

大跨重载铁路公铁两用斜拉桥技术创新

湖北公安长江公铁两用特大桥(以下简称“公安长江大桥”)是国内首座跨越长江的重载铁路公铁两用钢桁梁桥梁,全长1080米,由中铁大桥局集团有限公司(以下简称“中铁大桥局”)承建。项目依托公安长江大桥,积极开展科研攻关和自主创新,形成了“大跨度重载铁路公铁两用斜拉桥建造技术”,经过实践检验,该技术实施效果良好,对于同类桥梁的建设,具有较大的推广应用价值。

Study in the design and manufacture process of the elastic cable anchor box in steel box girder of Taizhou Bridge

Taizhou Yangtze River Highway Bridge is a large span suspension bridge with three pylons. The elastic cables are installed to connect the steel tower and the steel box girder. The constraints can increase the safety coefficient of the middle saddle, and improve the stress conditions of the middle pylon and decrease the deflection in the middle of the main girder, as well as the longitudinal displacement of the main girder caused by live loads. The anchorage boxes of the elastic cable are installed in the wind fairing outside the vertical web plate of the box girder. Two anchor boxes form a pair and are arranged parallelly. Eight anchor boxes are installed in the bridge. In this paper, the design scheme and the technical difficulties in manufacturing are briefly discussed with the precision control techniques.