斜拉桥主塔锚固区环向预应力张拉控制技术研究

The Research on Circular Prestressed Tension control technology in the Anchorage Zone of the Cable-stayed bridge's Main Tower

通过对赤石特大桥286.63 m高主塔锚固区环向预应力张拉成果的分析和张拉全过程进行总结,形成研究成果,确定环向预应力的初张应力和由于孔道变形和预应力筋钢绞线受力挤压重排几何变形引起的钢铰线伸长的增量值,指导后续环向预应力张拉施工。

This research production comes with the analysis of the circular prestressed tension in the main towerg anchorage zone of Chishite Bridge which is 286. 63 meters high plus the conclusion of the entire tensioning progress, ascertains the initial tension of the circular prestressed one and the incre- ment led by steel strand stretch which is a consequence of duct deformation and the deformation and the rearrangement of prestressed tendon by force and extrusion. It aims to guide the subsequent construction on Circular Prestressed Tension.