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针对现浇箱梁施工各环节产生结构起拱和下挠影响因素的研究,得出通过采取预设一定反拱度、采取高性能混凝土和高性能浆液、提高桥梁钢筋及预应力体系的安装定位精度以及混凝土和孔道压浆的精细化施工等措施,减少混凝土的收缩徐变,提高混凝土匀质性和整体性能,使箱梁起拱和下挠控制在合理范围内,使桥梁结构的耐久性和使用寿命得到保证。
Aiming at the research on the factors that affect the arch and deflection of the structure during the construction of cast-in-place box girder, it is concluded that the installation of high-performance concrete and high-performance grout should be taken to improve the installation position of the steel bar and prestressing system Precision and fine-grained concrete and hole grouting construction measures to reduce the shrinkage and creep of concrete to improve the uniformity of the concrete and the overall performance of the box arch and the next deflection control within a reasonable range so that the durability of the bridge structure And service life is guaranteed.