摘要
依托某双塔双索面梁斜拉桥,基于有限元软件MIDAS/Civil对大体积混凝土承台的水化热温度场进行了仿真模拟,详细研究了水化热温度场及混凝土内外温差等变化规律。并基于有限元研究成果,采取了大体积混凝土配合比优化设计、原材料预冷、预埋水管冷却、优化浇筑顺序及养护等多个温度控制措施。实践证明,上述措施可以有效控制混凝土水化热,提高混凝土施工质量,降低施工成本,从而获得良好的经济及技术效益。
In this paper,based on a double-tower double cable plane cable-stayed bridge,based on the finite element software MIDAS/Civil Engineering,the hydration heat temperature field of the mass concrete pile cap was simulated.The temperature field of the hydration heat and the temperature difference between the inside and outside of the concrete were studied in detail.And so on the law of change.Based on the results of finite element research,a number of temperature control measures,such as optimum design of mass concrete mix,precooling of raw materials,cooling of pre-buried water pipes,optimization of pouring sequence,and maintenance,were adopted.Practice has proved that the above measures can effectively control the heat of concrete hydration,improve the quality of concrete construction,reduce construction costs,and thus obtain good economic and technological benefits.
作者
杨慧
刘军来
YANG hui;LIU Junlai(School of Municipal and Road and Bridge Engineering,Inner Mongolia Technical College of Construction,Huhehot,Inner Mongolia 010000,China;School of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China)
出处
《公路工程》
北大核心
2018年第5期152-156,共5页
Highway Engineering
基金
湖北省交通运输厅科技项目(2014-721-3-13)
关键词
斜拉桥
承台
大体积混凝土
温度场
cable-stayed bridge
platform
mass concrete
temperature field