河北工业科技2024，Vol.41Issue(6)：443-449,7.DOI:10.7535/hbgykj.2024yx06006
内蒙古地区大体积混凝土挡墙施工温控分析
Temperature control analysis of mass concrete retaining wall construction in Inner Mongolia region
摘要
Abstract
To reduce the early cracking risk in mass concrete retaining walls in windy and arid areas and ensure the overall construction quality,the concrete retaining wall for coal collection operation of a coking plant in Inner Mongolia was taken as an example to carry out a parametic analysis on the parameters(including the installation of cold water piper,the length,height and thickness of retaining wall)by utilizing the finite element method.In this way,the temperature and stress fields after pouring were determined.Furthermore,the on-site temperature monitoring was performed as well.The results indicate that installing cold water pipes can effectively reduce internal temperatures and temperature differentials within the concrete retaining wall.Shrinkage stress increases when the length is less than 30 m,and remains relatively stable when it is greater than 30 m.Besides,when the height exceeds 4 m or the thickness exceeds 1.5 m,the shrinkage stress is close to the tensile strength,and the risk of cracking also increases accordingly.On site temperature monitoring indicates that the maximum temperature drop inside the concrete under the action of the cold water pipe is 6.6℃and the maximum temperature differential on the surface decreases by 4.7℃.The finite element simulation results are consistent with the actual monitoring results.The research results can provide reference for the design of the concrete retaining walls in windy and arid areas.关键词
墙体工程/大体积混凝土/水化热/收缩应力/有限元Key words
wall engineering/mass concrete/hydration heat/shrinkage stress/finite element分类
建筑与水利引用本文复制引用
刘卫然,吴昊天,韩建田,方斌,于海丰,高任清..内蒙古地区大体积混凝土挡墙施工温控分析[J].河北工业科技,2024,41(6):443-449,7.基金项目
河北省自然科学基金(E2021208010) （E2021208010）
中央引导地方科技发展资金项目(236Z5408G) （236Z5408G）
河北省高等学校科学技术研究项目(CXY2024045) （CXY2024045）
