回缩法测量竖向预应力筋的张拉力

Measuring vertical prestressed reinforcement tension with retraction method

结合现有研究成果及目前预应力混凝土箱梁施工现状,介绍了采用回缩法测量竖向预应力筋张拉力的具体操作方法及实际应用,并阐述相关注意事项,指出该方法有利于控制箱梁腹板的主拉应力,防止腹板斜裂缝的出现。

Combining with current research achievement and prestressed concrete box girder construction status, it introduces specific operation methods and actual application of vertical prestressed reinforcement tension with retraction method, describes corresponding attentions, and points out that this method is good for controlling box beam ribbed vault tension and for preventing ribbed vault cracking.