大体积混凝土承台水化热数值分析及温控措施研究  

Numerical Analysis of Hydration Heat and Research on Temperature Control Measures for Large Volume Concrete Bearing Platform

作　　者：王树成 Wang Shucheng(China Railway 17th Bureau Group Co.,Ltd.,Taiyuan,Shanxi 030006)

机构地区：[1]中铁十七局集团有限公司,山西太原030006

出　　处：《现代工程科技》2024年第15期1-4,共4页Modern Engineering Technology

摘　　要：为详细研究承台内部设置冷却水管对大体积混凝土结构的降温效果,运用有限元软件建模,分析了桥梁工程大体积混凝土结构由于水化热作用而发生开裂现象的机理。结合永州城南大桥(通车时改名为九嶷大桥)主桥下部结构主墩大体积混凝土承台工程实例,研究分析了设置冷却循环水管具有管冷作用的大体积混凝土温度时程曲线,以及温度梯度沿承台高度方向随时间变化的规律。研究表明,现场实测的温度数据和模拟计算结果吻合性较好,验证了有限元软件分析的可靠性。总结提出了大体积混凝土结构的温控措施,为后续大体积混凝土结构的设计与施工提供了一定的参考。In order to study in detail the cooling effect of setting cooling water pipes inside the pier on large volume concrete structures,finite element software was used to model and analyze the mechanism of cracking in large volume concrete structures of bridge engineering due to hydration heat.Combined with the example of the main pier of the main bridge of Yongzhou Chengnan Bridge(renamed Jiuyi Bridge when it was opened to traffic),the temperature time history curve and temperature gradient of large volume concrete with pipe cooling effect were studied and analyzed along the height direction of the pier.The research showed that the temperature data measured on site were in good agreement with the simulation calculation results,verifying the reliability of finite element software analysis.The temperature control measures of large volume concrete structures were summarized,and this provides a certain reference for the design and construction of large volume concrete structures in the future.

关 键 词：大体积混凝土 管冷作用 数值分析 温控措施 

分 类 号：U445.57[建筑科学—桥梁与隧道工程]