大体积混凝土一期通水冷却时机研究

大体积混凝土一期通水冷却的时间选择是一个影响冷却效果的重要因素，采用水管有限元法和水管冷却等效热传导法进行了研究，并对比分析了环境气温分别为升温过程和降温过程对计算结果的影响。计算结果表明：随着一期开始通水冷却时间的延后，冷却效果更好，停止通水后混凝土的温度更低，但混凝土内部应力趋于不利；当环境气温为升温过程或降温过程时，仍可以得到上述结论；建议大体积混凝土一期通水冷却宜尽早进行。

Study on first stage cooling opportunity of massive concrete

The determination of opportunity for first stage cooling of massive concrete is an important issue influencing the cooling effect,and this issue is investigated by pipe FEM and cooling pipe equivalent heat conduction model.We compare the different results induced by raising environmental temperature and lowing environmental temperature.If the time of first stage cooling is postponed,cooling effect is better,when cooling stops,the massive concrete’s temperature is lower,but the massive concrete’s stress is disadvantage.The above results would be the same whether the environmental temperature is in a rising period or lowing period.The suggestion on first stage cooling of massive concrete as early as possible is recommended.