严寒区域大体积混凝土低温施工温控研究

Research on Temperature Control during Low Temperature Construction of Large Volume Concrete in Severe Cold Regions

本文以黑龙江省佳木斯松花江大桥柱墩零号块体为研究对象,研究其内部温度场的演变过程,揭示其内部温度场的演变过程,并进一步验证其在极寒区域内的应用价值。研究发现,在寒冷地区,通过降低水化热、外部保温等方法,可以减少寒冷区域大体积混凝土的里表温差,减小温度下降速度,降低不利裂纹出现的几率,从而明显改善其抗裂性能。

This article takes the column pier zero block of Jiamusi Songhua River Bridge in Heilongjiang Province as the research object,studies the evolution process of its internal temperature field,reveals the evolution process of its internal temperature field,and further verifies its application value in extremely cold regions.Research has found that in cold regions,methods such as reducing hydration heat and external insulation can reduce the temperature difference between the inner and outer surfaces of large volume concrete in cold regions,reduce the rate of temperature drop,and reduce the probability of adverse cracks,thereby significantly improving its crack resistance performance.