基于管冷系统的大体积承台水化热抗裂研究  

Study on Hydration Heat Crack Resistance of Large Volume Bearing Platform Based on Pipe Cooling System

作　　者：李一鸣 高新民 张坤[1] 柳适 LI Yiming;GAO Xinmin;ZHANG Kun;LIU Shi(Lanzhou Jiaotong University;Gansu Road and Bridge Third Highway Engineering Co.,Ltd.)

机构地区：[1]兰州交通大学 [2]甘肃路桥第三公路工程有限责任公司

出　　处：《广东建材》2024年第3期72-76,共5页Guangdong Building Materials

基　　金：交通运输行业重点科技项目(2021-ZD2-073);甘肃省科技重点研发计划(21YF11GA011)。

摘　　要：为了研究管冷系统作用下大体积混凝土因水化热引起的开裂问题,以河沟大桥主墩承台为依托,实时采集温度场数据并进行分析,使用Midas FEA软件建立该承台三维有限元模型,分析了管冷系统对承台的冷却效果,研究表明:通过改变冷却水入管口温度和冷却管直径以优化系统设计可以有效减小结构里表温差,防止结构早期开裂。In order to study the cracking problem of mass concrete caused by hydration heat under the action of pipe cooling system,based on the main pier cap of Hegou Bridge,the temperature field data were collected and analyzed in real time.The three-dimensional finite element model of the cap is established by Midas FEA software,and the cooling effect of the pipe cooling system on the bearing platform was analyzed.The research shows that the temperature difference between the inner and outer surfaces of the structure can be effectively reduced by changing the inlet temperature of the cooling water and the diameter of the cooling pipe to optimize the system design,so as to prevent the early cracking of the structure.

关 键 词：大体积混凝土 承台 水化热 早期抗裂 管冷系统优化 

分 类 号：U44[建筑科学—桥梁与隧道工程]