基于有限元的超大体积混凝土施工温度效应分析及控制措施  

Temperature Effect Analysis and Control Measure of Super Mass Concrete Construction Based on Finite Element Method

作　　者：辜峰 GU Feng(Chengdu Railway Bureau Passenger Station Construction Headquarter,Chengdu 610000,Sichuan,China)

机构地区：[1]成都铁路局客站建设指挥部,四川成都610000

出　　处：《工程技术研究》2024年第16期96-98,共3页Engineering and Technological Research

摘　　要：文章以重庆东站地下结构混凝土底板工程为例,基于数值热传导理论方法和有限元分析,构建了超大体积混凝土施工温度效应分析的有限元模型及方法。基于构建的超大体积混凝土施工温度效应分析有限元模型,探讨了混凝土水灰比、环境温度和冷却水管布设等措施对混凝土中心温度的影响规律,为制订经济合理、切实可行的温度裂缝控制方案提供依据,并与施工过程中的实测温度数据进行对比分析,验证有限元分析方法在超大体积混凝土施工温度裂缝控制方案优选中应用的可行性。为大体积混凝土浇筑施工控制方案的优选提供客观依据,有利于减少大体积混凝土温度裂缝的产生,提升混凝土的抗渗性能,保障结构的安全性和耐久性。Based on the numerical thermal conduction theory and fi nite element analysis,the fi nite element model and method for analyzing the temperature effect of super mass concrete construction are constructed by taking the concrete floor engineering of underground structure of Chongqingdong Railway Station as an example.Based on the fi nite element model for analyzing the temperature effect of super mass concrete construction,the influence law of concrete water-cement ratio,ambient temperature and cooling water pipe layout on the central temperature of concrete is discussed,which provides a basis for formulating economical,reasonable and feasible temperature crack control scheme.The feasibility of the application of fi nite element analysis method in the selective preference of temperature crack control scheme for super mass concrete construction is verifi ed by comparing it with the measured temperature data in the construction process.It provides an objective basis for the selective preference of mass concrete pouring construction control scheme,which is conducive to reducing the generation of temperature cracks in mass concrete,improving the impermeability of concrete,and ensuring the safety and durability of the structure.

关 键 词：超大体积混凝土温度裂缝 有限元分析 温度场 防裂措施 

分 类 号：TV544[水利工程—水利水电工程]