双掺技术在大秦线框构立交桥冬期施工中的应用

摘要

Based on the winter construction characteristics of Da-Qin line crossing frame overpass,this paper adopted the double row concrete technology,introduced the mechanism of this technology,and analyzed its raw material selection and mixture ratio design method,summarized the specific concrete construction and maintenance measures,the results showed that the double mixing technology ensured the construction pe-riod and increased the engineering quality.%依据大秦线框构立交桥冬期施工特点，采用了混凝土双掺技术，介绍了该技术的作用机理，分析了原材料选择及配合比设计方式，总结了具体的混凝土施工及养护措施，结果表明采用双掺技术既保证了施工工期又提高了工程质量。