大挑臂预应力混凝土连续梁的加固设计

Design on Reinforcement of Long Cantilever Pre-stressed Concrete Continuous Girder

对于由于施工造成原因,箱梁顶板混凝土强度未达到设计C50要求的大挑臂预应力混凝土连续梁,通过增加桥面铺装厚度,并增加铺装层钢筋,从构造上加强桥面铺装和箱梁顶板的联结,精心加固后原桥能满足承载能力和使用功能的要求。

The concrete strength of box girder top plate of long cantilever pre-stressed concrete continuous girder does not reach the design requirement of C50 because of construction causes. The original bridge after elaborate reinforcement can satisfy the carrying capacity and using function requirement by increment of deck paving thickness and increment of reinforcing bars in paving layer in order to strengthen the join of deck pavement and box girder top plate.