东溪河特大桥钢管拱C60微膨胀自密实混凝土配合比设计数字量化与应用

Digital Quantification and Application of Proportion Design of C60 Microexpansive Self-compacting Concrete for Steel Tube Arch of Donghe Bridge

巫镇高速公路东溪河特大桥钢管拱设计采用微膨胀自密实C60混凝土填充,泵送距离远、跨径长、垂直高差大、施工作业难度大,混凝土性能要求高,文中根据实际情况,通过试验结合数字量化计算配合比与应用,实践证明方法可行,并取得了满意的效果。

The design of steel tube arch of Dongxihe Bridge on Wu-Zhen Expressway is filled with micro-expansion self-compacting C60concrete, which has the advantages of long pumping distance, long span, large vertical height difference, difficult construction operation and high concrete performance requirements. According to the actual situation, this paper combines the experiment with digital quantitative calculation of mix proportion and application, and the practice proves that it is feasible and has achieved satisfactory results.