悬浇桥梁合拢时的预应力张拉和应力监控

The pre-stressed tension and stress supervision during cantilever casting bridge's healing

结合宁蚌高速公路马汊河特大桥的悬浇施工,分析了分批张拉合拢钢束及配合应用内置钢弦式混凝土应变仪进行每批张拉时的应力监控方法,结果表明,该方法值得推广。

Combined with cantilever casting construction of Machahe grand bridge in Ning-bang expressway, this paper analyzes, the steel strand separately tensioned and healed, discusses stress monitoring method during branching tension by applying concrete strain gauge with built-in string wire, and the result shows that this method is worthy to popularize.