预应力混凝土连续箱梁桥常见裂缝成因与控制

Causes of the crack commonly appeared in pre-stressed concrete continuous box-girder bridge and its control

针对预应力混凝土连续箱梁桥的常见裂缝类型,从设计和施工两个角度分析了腹板斜裂缝、纵向裂缝以及底板预应力钢束下的混凝土保护层劈裂的产生原因,并提出了设计方面的抗裂措施和施工阶段裂缝控制要点。

In light of the type of common cracks in pre-stressed concrete continuous box-girder bridge, the author analyzes the causes of the oblique crack in steel web, the vertical crack, and the crack in concrete protective coating under the pre-stressed steel bunch of base plate from two angles of design and construction, and proposes crack resistant measures from the angle of design and crack control essentials at the stage of construction