摘要
通过对广州国际创新城金光东沉管隧道进行有限元分析,模拟得到了沉管大体积混凝土的最高温度及其出现的位置。将其与现场监测数据对比表明,基于Midas FEA对沉管大体积混凝土进行的有限元分析结果可靠。通过进一步对散热系数入模温度及环境温度进行参数化分析,发现沉管大体积混凝土温度与热交换系数呈负相关,与混凝土的入模温度和环境温度呈正相关。这表明,要保证混凝土的浇筑质量,必须严格控制混凝土的入模温度及养护条件,其中降低混凝土的入模温度效果最为显著。
Through the finite element analysis of the Jinguangdong immersed tunnel of Guangzhou International Innovation City, the maximum temperature of the immersed mass concrete and its location are obtained. Comparing with the on-site monitoring data, it shows that the finite element analysis based on Midas FEA on the immersed mass concrete is reliable. Through further parametric analysis on heat dissipation coefficient placing to mold temperature and ambient temperature, it was found that the temperature of the immersed mass concrete was negatively correlated with the heat exchange coefficient;it was positively correlated with the concrete placing to mold temperature and ambient temperature. This indicates that to ensure the quality of concrete pouring, the concrete placing to mold temperature and curing conditions must be strictly controlled and the effect of reducing the concrete placing to mold temperature is most significant.
作者
丘新溪
丰收
吕建兵
曾昭文
张福权
QIU Xinxi;FENG Shou;LYU Jianbing;ZENG Zhaowen;ZHANG Fuquan(China Railway Tunnel Group Sanchu Co.,Ltd.,Guangzhou 510000,China;College of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)
出处
《路基工程》
2020年第1期125-130,共6页
Subgrade Engineering
关键词
沉管隧道工程
大体积混凝土
有限元分析
参数化分析
热交换系数
immersed tunnel
mass concrete
finite element analysis
parametric analysis
heat exchange coefficient
