文明特大桥箱梁竖向预应力钢绞线二次张拉施工技术探讨

Construction Technology of Wenming Super-Large Bridge Box Girder Vertical Prestressing Strand Secondary Tensioning

预应力钢绞线二次张拉技术由于具有很多的优点,越来越多地在悬浇箱梁中得以应用。以文明特大桥主桥连续刚构箱梁竖向预应力钢绞线施工为例,探讨了箱梁竖向预应力钢绞线二次张拉低回缩锚固系统的施工技术,希望能为同类型施工提供有益的参考。

Prestressing strand secondary tensioning technology has many advantages and has been widely used in cantilever beam construction. Taking Wenming super-large bridge continuous rigid frame box vertical prestressing strand construction as an example, this paper discusses the construction technology of box girder vertical prestressing strand secondary tensioning, so as to provide useful reference for similar construction.