探讨公路大桥项目主墩承台混凝土施工技术  

Discussion on Concrete Construction Technology for Main Pier Cap of Highway Bridge Project

作　　者：彭安翔 Peng Anxiang(Hunan Yiyang highway and Bridge Construction Co.,Ltd.,Yiyang 413000,China)

机构地区：[1]湖南益阳公路桥梁建设有限责任公司,湖南益阳413000

出　　处：《科学技术创新》2022年第22期127-130,共4页Scientific and Technological Innovation

摘　　要：在混凝土浇筑过程中,由于水泥的水化作用会产生大量热量,而热量在结构内部积聚后很难消散,导致内外温差较大引起结构裂缝。因此,本文结合某公路大桥项目,选取了具有良好性能的原材料,并充分发挥粉煤灰自身优点,实现混凝土的分层浇筑,在承台施工前、中、后期的全过程中,设置循环水冷却管道,进行保温保湿养护,并根据现场的具体条件,适当延长养护周期等。结果表明,通过对温度进行监控,并采用适当的技术措施,可以科学指导施工工程,达到各项温控指标的要求,有效控制结构表面的温度裂纹。In the process of concrete pouring,due to the hydration of cement,a lot of heat will be generated,which is difficult to dissipate after the heat accumulates in the structure,resulting in large internal and external temperature difference and structural cracks.Therefore,combined with a highway bridge project,this paper selects raw materials with good performance and gives full play to the advantages of fly ash to realize layered pouring of concrete.In the whole process of the cushion cap construction,circulating water cooling pipes are set for thermal and moisture conservation,and the maintenance cycle is appropriately extended according to the specific conditions on site.The results show that by monitoring the temperature and adopting appropriate technical measures,the construction project can be scientifically guided,the requirements of various temperature control indicators can be met,and the temperature cracks on the structural surface can be effectively controlled.

关 键 词：桥梁承台工程 大体积混凝土 温控技术 

分 类 号：U445.559[建筑科学—桥梁与隧道工程]