大型地震工程模拟研究设施水下振动台基础大体积混凝土温度控制研究  

Research on Temperature Control of Mass Concrete for Underwater Shaking Table Foundation of Large-scale Earthquake Engineering Simulation Research Facility

作　　者：王进 于海申[2] 周志健[2] 姚文山 魏鹏 WANG Jin;YU Haishen;ZHOU Zhijian;YAO Wenshan;WEI Peng(China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200135,China;North China Branch,China Construction Eighth Engineering Division Co.,Ltd.,Tianjin 300350,China)

机构地区：[1]中国建筑第八工程局有限公司,上海200135 [2]中国建筑第八工程局有限公司华北分公司,天津300350

出　　处：《施工技术（中英文）》2021年第24期1-5,共5页Construction Technology

基　　金：上海市浦江人才计划资助(19PJ1433400)。

摘　　要：在国家大型地震工程模拟研究设施项目中,需研究大体积混凝土浇筑过程中的温度控制方法。基于多物理场耦合模型仿真结果,提出以20K/m的温度梯度作为温控指标,以表层间隔600mm和底层间隔800mm的测点温度差作为温度梯度监控数据。通过优化胶凝材料组分、控制入模温度、泵管包裹热反射材料等方法,将表层、底层温度梯度控制在20K/m以下,应变监测显示减缩效果良好,最大收缩应变仅为150με。Temperature control method in the mass concrete casting needs to be studied in the research of national large-scale earthquake simulation devices. According to the simulation results of multi-physics coupling model, a temperature gradient of 20 K/m is set to be the criterion for temperature control. The measured temperature differences of a surface interval of 600 mm and a bottom interval of 800 mm have been chosen as monitoring data for temperature gradients. Both the surface and the bottom temperature gradients have been controlled below 20 K/m through optimization of binder components and thermal reflected materials and casting temperature control, etc. Monitoring results show that the monitoring data of strain displays obvious shrinkage reduction effect and the maximum value is only 150με.

关 键 词：地震工程 水下振动台 混凝土 温度梯度 耦合 监控 

分 类 号：TU375[建筑科学—结构工程]