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混凝土和预应力钢筋混凝土桥梁已经成为现代桥梁主要结构型式就混凝土数量而言,一座大型桥梁往往需要灌注十几万立方米甚至几十万立方米混凝土。就混凝土的品种而言,也是多种多样的,有预制的,有现浇的;有高标号的,有低标号的;有低流动性的,有高流动性的;有普通混凝土,有水下混凝土。混凝土施工已是桥梁施工作业量最大,操作最繁重,劳动强度最大,使用机械、人力和耗能最多的施工作业。桥梁工程质量是否得到保证与混凝土施工作业各阶段质量控制有直接关系。不论是搅拌、输送,还是灌注成型,如何正确选择和合理设置各种混凝土施工机械显得十分重
Concrete and Prestressed Reinforced Concrete Bridges Are the Main Types of Modern Bridges In terms of the amount of concrete, a large bridge often requires pouring hundreds of thousands of cubic meters or even hundreds of thousands of cubic meters of concrete. In concrete terms, it is also varied, prefabricated, cast-in-place; with high markings, with low markings; with low flowability, high flowability; with regular concrete, with water Under concrete. Concrete construction has been the largest bridge construction operations, the most heavily operated, labor-intensive, the use of mechanical, human and energy-consuming construction operations. Whether the quality of bridge construction is guaranteed is directly related to the quality control of all stages of concrete construction. Whether it is mixing, conveying, or perfusion molding, how to properly select and set a reasonable variety of concrete construction machinery is very heavy