冷却水温对大体积混凝土温度应力的影响  

Effect of cooling water temperature on temperature stress of mass concrete

作　　者：谭海苗 刘阳 Tan Haimiao;Liu Yang(Nanjing Water Conservancy Planning and Design Institute Co.,LTD.,Nanjing)

机构地区：[1]南京市水利规划设计院股份有限公司,南京

出　　处：《吉林水利》2023年第9期46-49,65,共5页Jilin Water Resources

摘　　要：大体积混凝土在浇筑过程中,水化热所产生的温度应力极易造成温度裂缝,采用水管冷却措施可有效降低温度应力。但使用过低温度的冷却水,容易造成混凝土出现冷击现象而产生裂缝。本文通过研究不同情况下的温度应力变化规律,分析不同冷却水温和不同冷却措施对混凝土温度应力的影响,为合适的冷却水温和冷却措施提供参考。研究结果表明,常规的恒定冷却水温容易造成混凝土的冷击现象,采用小温差、多期缓慢冷却的方式可更好地避免冷击现象的产生。In the process of mass concrete pouring,temperature stress generated by hydration heat is very easy to cause temperature cracks.The use of water pipe cooling measures can effectively reduce the temperature stress.However,the use of too low temperature cooling water is easy to cause the“concrete cold strike”phenomenon and concrete cracks.In order to study the influence of different cooling water temperature and different cooling measures on the temperature stress of concrete,this paper provides a reference for providing appropriate cooling water temperature and cooling measures.The results show that the cold strike of concrete is easily caused by the conventional constant cooling water temperature,and the cold strike phenomenon can be better avoided by using the way of small temperature difference and multi-period slow cooling.

关 键 词：水管冷却 混凝土温度场 温度应力 分散降温 

分 类 号：TU528[建筑科学—建筑技术科学]